Maya Calendar vs HolyDates
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Maya Calendar
Explore the ancient Maya calendar and its connection to the Gregorian calendar. Calculate dates, discover personality traits based on your Maya birthday, and learn about Maya history and time cycles. This app works offline, making it perfect for travel and study.
- Maya and Gregorian date conversion
- Maya birthday calculation and personality insights
- Maya historical events
- Explanation of Maya time cycles
- Offline functionality
- Personalized birthday reminders
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A great resource for those who want to go back and forth between Maya and Christian Calendar dates. No internet connection needed, so it can be in your pocket as you travel through Maya ruins and use it to calculate the Gregorian calendar dates from Maya long counts on monuments. Maya Calendar gives you the Maya calendar date for today or any date in history – past, present, and future. Convert dates back and forth between the Maya and Gregorian calendars, learn about the various Maya cycles of time, and gain a better understanding of why December 21, 2012 A.D. is an important Maya date. In addition, this app can calculate your birthday in the Maya sacred calendar and learn what it says about your personality traits and destiny. Maya Calendar offers these great features: – The Home Page displays the current day in the Maya Calendar, both in hieroglyphs and in modern text formats. – “This Day in Maya History” cites a major event in Maya history for almost every day of the year. – The “Maya Calendars” section provides a detailed explanation of each of the major Maya calendrical cycles, a discussion of the calendar correlation debate, and the thinking behind the possible end date of 2012 A.D. – The “Calculator” allows you to convert any Gregorian date into its Maya calendar equivalent. – The “Long Count” feature allows you to convert any Maya Long Count date into its Gregorian calendar equivalent. – The “Birthdays” feature allows you to calculate and store the Maya birthdays of everyone you know. Once calculated, the app provides a host of information about that individual: personality traits; animal, color, and directional associations; and events in Maya history that occurred on the same date as their birth. – The “Known Birthdays” feature lists and saves the names of everyone whose Maya birthday you have recorded and notifies you when their birthday comes around. – “What to Do Today” lists the activities that modern Maya calendar priests recommend for any given day. Maya Calendar, created by Dr. Ed Barnhart, is an invaluable tool for students investigating Maya inscriptions, and for anyone fascinated with the workings of the Maya calendar.
HolyDates
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Version 1.10 No Advertisements, No In-App Purchases Did you ever need to look-up when Easter Sunday or Passover will be this year? Even though many of the religious holydays occur on the same date of the Hebrew calendar every year you may not know the corresponding date on the Gregorian calendar. HolyDates provides a quick answer to these questions. HolyDates uses algorithms provided by Jean Meeus in his book, “Astronomical Algorithms” second edition. His methods have become a sort-of standard for these sorts of computations. The information and functionality provided by HolyDates is divided onto several screens. The Main Screen: The day and date for eleven holy days are shown on the main screen. • Passover • Easter • Unleavened Bread (aka .Matzo) – seven days in length • First Fruits (two methods for determining this date) • Shavuot (two methods for determining this date) • Pentecost • Rosh Hashanah (aka Yom Teruach, Feast of Trumpets, New Year Day) • Yom Kippur (aka Day of Atonement) • Sukkot (aka Feast of Booths, Feast of Weeks, Feast of Tabernacles) The Julian Day Number Screen: Julian Day Numbers are used by astronomers to keep track of dates or perform date-related computations. HolyDates provides a separate screen for converting between the two systems. You can: • convert Gregorian Dates to Julian Day Number • convert Julian Day Numbers to Gregorian Dates The Information Screen: This is the HolyDates help file that provides additional background information. The origin of the modern calendar system and how HolyDates works are discussed.
Screenshots
Verdict
The clearest difference is price: Maya Calendar at Free against HolyDates's $0.99. Maya Calendar also leads on update cadence (every 3 months vs every 34 months). HolyDates's advantage is in-app purchases (none vs 1) and device support (5 vs 3). On ads and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Maya Calendar is free to download; HolyDates costs $0.99 up front. Maya Calendar sells 1 one-off in-app purchase. HolyDates asks for nothing beyond the download.
Maya Calendar ships an update every 3 months, HolyDates every 34 months. The most recent releases landed on August 27, 2026 and September 18, 2026 respectively.
| Parameter | Maya Calendar | HolyDates |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 3.2 (13 ratings) — better | — |
| Positive reviews | 56.5% of reviews | — |
| Number of ratings | 13 — better | — |
| Update frequency | Every 3 months — better | Every 34 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac, Apple TV — better |
| Requires iOS | 13.0 | 12.4 — better |
| Further details — not scored | ||
| Size | 29 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Edwin Barnhart | Tom Stankey |
In-app purchases
Maya Calendar
- Happy Maya Calendar Birthday!$1.99
HolyDates
No in-app purchases





