EULA

Vaishnava Calendar for Android End­ User License Agreement ("Agreement")

Vaishnava Calendar for Android Terms & Conditions
Last updated: (15.04.2017)

Please read this End User License Agreement ("Agreement") carefully before clicking "Continue" or "I Agree" buttons, downloading or using Vaishnava Calendar for Android Application ("Application"). By clicking "Continue" or "I Agree" buttons, downloading or using the Application, you are agreeing to be bound by the terms and conditions of this Agreement between you and the Application Developer (“Developer”). If you do not agree to the terms of this Agreement, do not click on "Continue" or "I Agree" buttons and do not download or use the Application. Developer reserves the right to modify this Agreement at any time without notice.

I. License

Vaishnava Calendar Developer grants you a revocable, non­exclusive, non­transferable, limited license to download, install and use the Application solely for your personal, non­commercial purposes strictly in accordance with the terms of this Agreement.

II. Restrictions on Use

You shall use the Application strictly in accordance with the terms of the Related Agreements and shall not:
(a) decompile, reverse engineer, disassemble, attempt to derive the source code of, or decrypt the Application;
(b) make any modification, adaptation, improvement, enhancement, translation or derivative work from the Application;
(c) violate any applicable laws, rules or regulations in connection with Your access or use of the Application;
(d) use the Application for any revenue generating endeavor, commercial enterprise, or other purpose for which it is not designed or intended.

III. Intellectual Property Rights

You acknowledge and agree that the Application and all copyrights, patents and other intellectual property rights associated therewith are, and shall remain, the property of Developer, its affiliates, partners, suppliers or licensors. Furthermore, You acknowledge and agree that the source and object code of the Applications and the format, directories, queries, algorithms, structure and organization of the Application are the intellectual property and proprietary and confidential information of the Developer and its affiliates, its partners, licensors and suppliers.
You are not granted any intellectual property rights in or to the Application by implication, estoppel or other legal theory, and all rights in and to the Application not expressly granted in this License are hereby reserved and retained by the Developer, its affiliates, partners, suppliers or licensors.

IV. Infringement Acknowledgement

You and Developer acknowledge and agree that, in the event of a third party claim that the Application or Your possession or use of the Application infringes any third party’s copyrights or intellectual property rights, You (and not Developer) will be responsible for the investigation, defense, settlement and discharge of any such claim of intellectual property infringement. You will, however, promptly notify Developer in writing of such a claim.

V. Submissions to the Vaishnava Calendar Package Distribution Server and Vaishnava Calendar Collaboration Services

Vaishnava Calendar Application may offer Collaboration features that allow you to submit Vaishnava Calendar Packages and other materials (including links to third-party content) on areas of the Vaishnava Calendar Application accessible and viewable by the public. You agree that any use by you of such features, including any materials submitted by you, shall be your sole responsibility, shall not infringe or violate the rights of any other party or violate any laws, contribute to or encourage infringing or otherwise unlawful conduct, or otherwise be obscene, objectionable, or in poor taste. You also agree that you have obtained all necessary rights and licenses.
In the event of a third party claim that the Application is used to access or distribute their copyrighted content, You (and not Developer) will be responsible for the investigation, defense, settlement and discharge of any such claim of copyright infringement. You will, however, promptly notify Developer in writing of such a claim.
You agree to provide accurate and complete information in connection with your submission of any materials on the Vaishnava Calendar Application. You hereby grant the Developer a worldwide, royalty-free, nonexclusive license to use such materials as part of the Vaishnava Calendar Collaboration Services, without any compensation or obligation to you. The Developer reserves the right to not post or publish any materials, and to remove or edit any material, at any time in its sole discretion without notice or liability.
The Developer has the right, but not the obligation, to monitor any materials submitted by you or otherwise available as part of the Vaishnava Calendar Collaboration Services, to investigate any reported or apparent violation of this Agreement, and to take any action that the Developer in its sole discretion deems appropriate.

VI. Use of Vaishnava Calendar Additional Features

You agree that the Vaishnava Calendar Application include security technology that can limit your use of the Vaishnava Calendar Additional Features that, whether or not Application features are limited by security technology, you shall use Application in compliance with the applicable usage rules (“Usage Rules”) established by Developer, and that any other use of the Vaishnava Calendar Application may constitute a copyright infringement. Any security technology is an inseparable part of the Vaishnava Calendar Application. Developer reserves the right to modify the Usage Rules at any time. You agree not to violate, circumvent, reverse-engineer, decompile, disassemble, or otherwise tamper with any of the security technology related to such Usage Rules for any reason or to attempt or assist another person to do so. Usage Rules may be controlled and monitored by Developer for compliance purposes, and Developer reserves the right to enforce the Usage Rules without notice to you. You agree not to modify the software in any manner or form, or to use modified versions of the software, for any purposes including obtaining unauthorized access to the Vaishnava Calendar Additional Features. Violations of system or network security may result in civil or criminal liability.

VII. Disclaimer of Warranties

YOU ACKNOWLEDGE AND AGREE THAT THE APPLICATION IS PROVIDED ON AN “AS IS’ AND “AS AVAILABLE” BASIS, AND THAT YOUR USE OF OR RELIANCE UPON THE APPLICATION AND ANY THIRD PARTY CONTENT AND SERVICES ACCESSED THEREBY IS AT YOUR SOLE RISK AND DISCRETION. DEVELOPER AND ITS AFFILIATES, PARTNERS, SUPPLIERS AND LICENSORS HEREBY DISCLAIM ANY AND ALL REPRSENTATIONS, WARRANTIES AND GUARANTIES REGARDING THE APPLICATION AND THIRD PARTY CONTENT AND SERVICES, WHETHER EXPRESS, IMPLIED OR STATUTORY, AND INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. FURTHERMORE, DEVELOPER AND ITS AFFILIATES, PARTNERS, SUPPLIERS AND LICENSORS MAKE NO WARRANTY THAT (I) THE APPLICATION OR THIRD PARTY CONTENT AND SERVICES WILL MEET YOUR REQUIREMENTS; (II) THE APPLICATION OR THIRD PARTY CONTENT AND SERVICES WILL BE UNINTERRUPED, ACCURATE, RELIABLE, TIMELY, SECURE OR ERROR-FREE; (III) THE QUALITY OF ANY PRODUCTS, SERVICES, INFORMATION OR OTHER MATERIAL ACCESSED OR OBTAINED BY YOU THROUGH THE APPLICATION WILL BE AS REPRESENTED OR MEET YOUR EXPECTATIONS; OR (IV) ANY ERRORS IN THE APPLICATION OR THIRD PARTY CONENT AND SERVICES WILL BE CORRECTED. NO ADVICE OR INFORMATION, WHETHER ORAL OR WRITTEN, OBTAINED BY YOU FROM DEVELOPER OR THE APPLICATION SHALL CREATE ANY REPRESENTATION, WARRANTY OR GUARANTY. FURTHERMORE, YOU ACKNOWLEDGE THAT DEVELOPER HAVE NO OBLIGATION TO CORRECT ANY ERRORS OR OTHERWISE SUPPORT OR MAINTAIN THE APPLICATION.

VIII. Limitation of Liability

UNDER NO CIRCUMSTANCES SHALL DEVELOPER OR ITS AFFILIATES, PARTNERS, SUPPLIERS OR LICENSORS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL OR EXEMPLARY DAMAGES ARISING OUT OF OR IN CONNECTION WITH YOUR ACCESS OR USE OF OR INABILITY TO ACCESS OR USE THE APPLICATION AND ANY THIRD PARTY CONTENT AND SERVICES, WHETHER OR NOT THE DAMAGES WERE FORESEEABLE AND WHETHER OR NOT DEVELOPER WAS ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Privacy Policy

Privacy Policy of Vaishnava Calendar for Android

This Application collects some Personal Data from its Users.

I. Types of Data collected

Among the types of Personal Data that this Application collects, by itself or through third parties, there are: Cookies and Usage Data.
Other Personal Data collected may be described in other sections of this privacy policy or by dedicated explanation text contextually with the Data collection.
The Personal Data may be freely provided by the User, or collected automatically when using this Application.
Any use of Cookies - or of other tracking tools - by this Application or by the owners of third party services used by this Application, unless stated otherwise, serves to identify Users and remember their preferences, for the sole purpose of providing the service required by the User.
Failure to provide certain Personal Data may make it impossible for this Application to provide its services.
Users are responsible for any Personal Data of third parties obtained, published or shared through this Application and confirm that they have the third party's consent to provide the Data to the Owner.

II. Mode and place of processing the Data

Methods of processing

The Data Controller processes the Data of Users in a proper manner and shall take appropriate security measures to prevent unauthorized access, disclosure, modification, or unauthorized destruction of the Data.
The Data processing is carried out using computers and/or IT enabled tools, following organizational procedures and modes strictly related to the purposes indicated. In addition to the Data Controller, in some cases, the Data may be accessible to certain types of persons in charge, involved with the operation of the site (administration, sales, marketing, legal, system administration) or external parties (such as third party technical service providers, mail carriers, hosting providers, IT companies, communications agencies) appointed, if necessary, as Data Processors by the Owner. The updated list of these parties may be requested from the Data Controller at any time.

Place

The Data is processed at the Data Controller's operating offices and in any other places where the parties involved with the processing are located. For further information, please contact the Data Controller.

Retention time

The Data is kept for the time necessary to provide the service requested by the User, or stated by the purposes outlined in this document, and the User can always request that the Data Controller suspend or remove the data.

III. The use of the collected Data

The Data concerning the User is collected to allow the Owner to provide its services, as well as for the following purposes: Analytics.
The Personal Data used for each purpose is outlined in the specific sections of this document.

IV. Detailed information on the processing of Personal Data

Personal Data is collected for the following purposes and using the following services:

Analytics
The services contained in this section enable the Owner to monitor and analyze web traffic and can be used to keep track of User behavior.
Google Analytics (Google Inc.)
Google Analytics is a web analysis service provided by Google Inc. (“Google”). Google utilizes the Data collected to track and examine the use of this Application, to prepare reports on its activities and share them with other Google services. Google may use the Data collected to contextualize and personalize the ads of its own advertising network.
Personal Data collected: Cookies and Usage Data.
Place of processing: US
Google Privacy Policy

V. Additional information about Data collection and processing

Legal action

The User's Personal Data may be used for legal purposes by the Data Controller, in Court or in the stages leading to possible legal action arising from improper use of this Application or the related services.
The User declares to be aware that the Data Controller may be required to reveal personal data upon request of public authorities.

Additional information about User's Personal Data

In addition to the information contained in this privacy policy, this Application may provide the User with additional and contextual information concerning particular services or the collection and processing of Personal Data upon request.

System logs and maintenance

For operation and maintenance purposes, this Application and any third party services may collect files that record interaction with this Application (System logs) or use for this purpose other Personal Data (such as IP Address).

Information not contained in this policy

More details concerning the collection or processing of Personal Data may be requested from the Data Controller at any time. Please see the contact information at the end of this document.

The rights of Users

Users have the right, at any time, to know whether their Personal Data has been stored and can consult the Data Controller to learn about their contents and origin, to verify their accuracy or to ask for them to be supplemented, cancelled, updated or corrected, or for their transformation into anonymous format or to block any data held in violation of the law, as well as to oppose their treatment for any and all legitimate reasons. Requests should be sent to the Data Controller at the contact information set out above.

This Application does not support “Do Not Track” requests.

To determine whether any of the third party services it uses honor the “Do Not Track” requests, please read their privacy policies.

Changes to this privacy policy

The Data Controller reserves the right to make changes to this privacy policy at any time by giving notice to its Users on this page. It is strongly recommended to check this page often, referring to the date of the last modification listed at the bottom. If a User objects to any of the changes to the Policy, the User must cease using this Application and can request that the Data Controller remove the Personal Data. Unless stated otherwise, the then-current privacy policy applies to all Personal Data the Data Controller has about Users.

Information about this privacy policy

The Data Controller is responsible for this privacy policy, prepared starting from the modules provided by Google, Inc. and hosted on Google's servers.

VI. Further information about Personal Data

Further rights of the Users

We don't sell or rent Users' Data to any third parties for any purpose. The only uses of Data are those highlighted in this policy. Users are the only owner of their Data and can request modification or deletion at any time.

VII. Contact information

Data owner

Abhay Charan das

Owner contact email:

abhay.charan.d@gmail.com

VIII. Definitions and legal references

Personal Data (or Data)

Any information regarding a natural person, a legal person, an institution or an association, which is, or can be, identified, even indirectly, by reference to any other information, including a personal identification number.

Usage Data

Information collected automatically from this Application (or third party services employed in this Application), which can include: the IP addresses or domain names of the computers utilized by the Users who use this Application, the URI addresses (Uniform Resource Identifier), the time of the request, the method utilized to submit the request to the server, the size of the file received in response, the numerical code indicating the status of the server's answer (successful outcome, error, etc.), the country of origin, the features of the browser and the operating system utilized by the User, the various time details per visit (e.g., the time spent on each page within the Application) and the details about the path followed within the Application with special reference to the sequence of pages visited, and other parameters about the device operating system and/or the User's IT environment.

User

The individual using this Application, which must coincide with or be authorized by the Data Subject, to whom the Personal Data refers.

Data Subject

The legal or natural person to whom the Personal Data refers.

Data Processor (or Data Supervisor)

The natural person, legal person, public administration or any other body, association or organization authorized by the Data Controller to process the Personal Data in compliance with this privacy policy.

Data Controller (or Owner)

The natural person, legal person, public administration or any other body, association or organization with the right, also jointly with another Data Controller, to make decisions regarding the purposes, and the methods of processing of Personal Data and the means used, including the security measures concerning the operation and use of this Application. The Data Controller, unless otherwise specified, is the Owner of this Application.

This Application

The hardware or software tool by which the Personal Data of the User is collected.

Legal information

Notice to European Users: this privacy statement has been prepared in fulfillment of the obligations under Art. 10 of EC Directive n. 95/46/EC, and under the provisions of Directive 2002/58/EC, as revised by Directive 2009/136/EC, on the subject of Cookies.
This privacy policy relates solely to this Application (Vaishnava Calendar for Android).

Latest update: March 26, 2017

Review of Vaishnava Calendar for Android

Table of content

• 1. Installation
• 2. Month view
• 3. Day view
• 4. Top and bottom bars
• 5. Settings
• 6. Change layout
• 7. Find and Go to Event
• 8. Go to Date
• Reference № 1
• Reference № 2
• Reference № 3
• Reference № 4

Month view - main screen

Day view

This article introduces Vaishnava Calendar - Android application which calculates most popular Vaishnava events and shows them in Gregorian month view (see Reference № 1). Ekadashi fastings are also included because the predecessor of this app is 'Ekadashi Reminder' (see Reference № 2).
Additional benefits are:

• the number of supported Vaishnava events is 146
• there is a story/description for each event
• sends notification about today's events
• supports Daylight Saving Time (Summer Time)
• supports English, Ukrainian, Russian and Portuguese
• has time machine for years 2010-2026 AD
• doesn't have unwanted popups, spam and ads
• has very small size and consumes minimum of resources
• doesn't require Internet connection
• doesn't retrieve or store any identifying information
• doesn't collect anonymous usage data
• has very simple and user-friendly interface:

1. Installation

Ok, let's start and install the application from Google Play: http://play.google.com/store/apps/details?id=com.acd.calendar
After opening for the first time it asks questions for configuring:

• Current location
• using Summer Time (DST)
• showing events in Month view
• notifying events
• algorithm of calculations

The section 5. Settings describes these in details.
Then 'Help screen' is appeared and shows the main controls:

• Menu 1
• Menu 2
• Refresh
• Swipe left - swipe right

After tapping on any place of the screen the 'Help screen' disappears and the 'Main screen' is opened.

2. Month view

Top and bottom parts are described later in the section 4. Top and bottom bars.
In the center of the Month view there is swipe area which can be scrolled left or right with a finger. Scrolling left to right leads to displaying previous month. Scrolling right to left leads to displaying next month. This way it is possible to get information about all months in one Gaurabda/ChandraVarsha: from one Gaura Purnima to the next Gaura Purnima. Switching Gaurabda/ChandraVarsha in the past or in the future is done by using 'Go to Date' (or 'Time machine' which is described in the section 8. Go to Date).
Month view consists of days, which are numerated from 1 to the last day of the current month. Days from previous or next months are inactive and shown lightened. Each day can contain such icons:

• Purnima or Amavasya
• Vaishnava holiday

If there are more than 2 holidays in some day then they are shown in such way:

• Ekadashi icon is always shown the first.
• If the day doesn't have Ekadashi then the icon of 1st group event (RED) is shown.
• Similarly, if the day doesn't have RED event then the icon of 2nd group event (GREEN) is shown.
• And similarly - with 3rd group events (BLUE).

Second and other events are shown in the bottom as circles with appropriate color.
Current day is painted orange. This coloured day is also called 'selected'.

3. Day view

After tapping on a day in Month view the Day view is opened.
Top and bottom parts are described later in the section 4. Top and bottom bars.
In the center of the Day view there is swipe area which can be scrolled left or right with a finger. Scrolling left to right leads to displaying previous day. Scrolling right to left leads to displaying next day. This way it is possible to get information about all days in one month: from the first day to the last day. Switching months (past or future) is possible by some ways, e.g. 1) return to Month view 2) change month 2) go to Day view again. Or it is possible to use 'Go to Date' (or 'Time machine' which is described in the section 8. Go to Date).
Day view contains information about selected day:

• Panchanga/Panjika: Tithi (with end time), Paksha, Nakshatra, Yoga, Karana and Vaara
• Gaurabda and year
• Gaudiya Vaishnava masa and Purnimanta masa
• phase of Moon
• Brahma Muhurta
• Sunrise and Sunset
• Moonrise and Moonset
• for Ekadashi vrata day additionally: the time when fasting begins and the period of breaking the fast
• for Vaishnava holiday additionally: info about fasting

Each Vaishnava event has the text with story (or description). After tapping on the event in Day view the new fullscreen window with the story text is opened:

It needs to tap any place (except top color line) to exit from full screen mode.
NOTE: After tapping top color line the 'Share' dialog is appeared. This allows to share this story with others.

4. Top and bottom bars

Top bar

In the Month view the bar on the top displays current month and Gregorian year, e.g. August 2016.
In the Day view the bar on the top displays current Gregorian day, e.g. 25 August 2016, Thursday. NOTE: the format of this string is configured in 'Settings'.
The top bar also has 2 important elements - 2 menus which drop out after tapping on Lotus-Tilak icon (Menu 1 on the left side) and on the vertical menu - 3 vertical dots (Menu 2 on the right side).
'Menu 1' consists of 4 elements:

• 'Share' - this one allows to share/send the information about current (selected) event. Also it is possible to share installation/support links in social networks, including Facebook
• 'Help screen' - shows hints about the location of some control elements on the Month view
• 'Acknowledgments' page says 'Big thanks' to everybody who has taken part in application development and support
• 'About' - shows application version and developer's email address

'Menu 2' consists of 2 elements:

• 'Settings' - this will be described in the section 5. Settings in details
• 'Language' - let's change language. NOTE: after selecting the language it needs to exit from app and then start it again to apply changes

Bottom bar

The bar on the bottom consists of 4 most usable buttons:

• Find and Go to Event
• Go to Date
• Change Layout
• Settings

5. Settings

This menu configures all static parameters of the application:

1. Current location
   NOTE: Built-in database of 4,000 cities is in English, so, it needs to input only Latin letters!
   Start with entering Latin letters of a City name. After entering at least 2 letters the window with available Cities is appeared (all these Cities will contain entered letters). It is possible to scroll top-bottom to show more Cities available. After it please choose your City from a list. When the full name of your City appears in the input field please tap 'Accept' to apply or 'Cancel' - to reject.
   It is also possible to view a list of available cities by entering 2-letters Language Code only, e.g.
   
   • 'in' - is 2-letters code of India
   • 'us' - is 2-letters code of USA
   and so on. It is always possible to add new City to database by emailing to Abhay Charan prabhu directly (Reference № 1). Full list of Language Codes is available http://www.loc.gov/standards/iso639-2/php/code_list.php
   NOTE: It is planned to get rid of using Language Code and move to using Country Code instead.


2. Daylight saving time
   Currently 3 preferences are available for using Summer Time (DST):
   • Europe
   • USA
   • Australia
   It is possible to add more preferences by request (contacts are in Reference № 1).
   After setting DST option on this screen the value of 'Time zone' will be shown below. Also it is recommended to check current clock value (from smartphone chip) with the last string on this screen (which is calculated by application) named 'Local Time'. If everything has been set correctly then both values will be equal.


3. Show events
   All events are divided on groups:
   • Main holidays
   • Appearance/disappearance
   • Extra holidays
   • Plus holidays
   NOTE: Last group isn't used now and reserved for future use (for user's events).
   This setting allows to switch on/off the show of these groups on the Month view.


4. Notify events
   Read details about grouping events from previous option.
   This setting allows to switch on/off the notification of events for each group.
   The application generates notifications and fires them in the system status bar. These notifications are fired in the day of event (because it is not reminder app, so, there are no options to choose 'Notify in 1 day' or 'Notify in 2 days'...). All notifications are checked and fired at approximately 10 minutes after the midnight.


5. The algorithm of calculations
   This option was designed mainly for ISKCON devotees, who currently use 2 different algorithms for calculating the start time of events. Both of them has been implemented, so, the application states full support for ISKCON (Reference № 3, Reference № 4):
   - using Shri Mayapur city - stated by A.C. Bhaktivedanta Swami Prabhupada and widely used until 1990 AD
   - using the 'Current location' - an alternative algorithm proposed in 1990 AD and also used now.
   

6. Change layout

The idea behind this feature is very simple - some devotees prefer Horizontal layout, some - Vertical layout:

Horizontal layout

Vertical layout

To change layout it needs to tap 'Change layout' button in the bottom bar of Month View. After this action an additional menu is appeared on the top with new options. Tap 'Change layout' option and check whether you are happy with new layout.
To change the first displayed day of the week it needs to tap appropriate option on the right of 'Change layout' option. NOTE: It is possible to set any day as the first displayed in the week - from Sunday till Saturday.

7. Find and Go to Event

This feature allows to see all available holidays in the application. Just tap 'Find and Go to Event' button in the bottom bar of any View and the menu is appeared:

Selecting appropriate group of events it is possible to see all of them as a list in the next window. After selecting one event, e.g. 'Ratha Yatra', from the list the app shows this event. It looks like the operation 'Go to Ratha Yatra' has just been performed.
NOTE: In the window with the list of events a function 'Search' is also available and waiting for the input.

8. Go to Date

'Time machine' is built-in mechanism for switching year/Gaurabda in period of 2010-2026 AD (or Gaurabda 524-540) in the past or in the future.
The control 'Go to Date' can be used to travel to an arbitrary point in time and get information about an event for that moment.
E.g. after tapping 'Go to Date' and setting the date in 2 years, then the application recalculates everything by setting that future date to now and doing this date selected. It looks like travelling in future time.
To return to current moment it needs to tap on 'Refresh' control or close application.
Note: the application doesn't save a time or info between sessions. Every time the app is launched (or 'Refresh'-ed) it takes current time from system clock and makes calculations again.

Thanks for reading this, hope it was useful, Hare Krishna!
Your servant
Abhaya Prada devi dasi

Reference № 1

More details about the application and contacts:
- project Home page: http://www.facebook.com/vc108
- install application from Google Play: http://play.google.com/store/apps/details?id=com.acd.calendar
- YouTube class: Working with Vaishnava Calendar
- add new cities to database, feature requests and so on: Abhay Charan prabhu "abhay.charan.d@gmail.com"

Reference № 2

Ekadashi Reminder project Home page is http://www.facebook.com/EkadashiReminder
Google Play page is http://play.google.com/store/apps/details?id=com.acd.ekadashi
This app calculates Vaishnava (or Bhagavata) Ekadashi which are Suddha (or pure): an observance is based on the rule that Dashami or the tenth day during a lunar fortnight should have ended before Arunodaya (96 minutes period before sunrise on the Ekadashi or the 11th day in a lunar fortnight).
Note: Smarta Ekadashis are not supported (available in any Hindu calendar).

Reference № 3

Calculations of Vaishnava events are based on 'Shri Navadwipa Panjika' by Shrila Bhaktisiddhanta Saraswati Thakura, who cultivates Shri Harinam Kirtan worldwide. 'Shri Navadwipa Panjika' was designed according to Vaisnava Smriti - 'Shri Hari-bhakti-vilasa' (by Sanatana Gosvami). This book can be easily found in Internet in English translation by Manoj Mitra, e.g. in the page https://www.facebook.com/notes/ekadashi-reminder-for-android/sri-navadwip-panjika/1140923125931329

Reference № 4

The calculations were checked against Gcal for Windows Version 11
NOTE: GCal (for 'Gaurabda Calendar') is a full-featured calendar calculation program for Gaudiya Vaishnavas. Downloaded from www.KrishnaDays.com. Developed by Gopalapriya prabhu of ISKCON Bratislava, Slovakia.
The results of the check are available on project's Home page.