Every iPhone needs a few good doomsday method apps. We benchmark 250+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
Master the art of calculating weekdays for any date with this comprehensive educational app. Learn a proven technique, practice with interactive exercises, and track your progress to sharpen your mental arithmetic skills.
Discover historical events, holidays, and astronomical data for any given day. This app provides daily insights into history, sunrise/sunset times, moon phases, and planetary alignments without requiring an internet connection.
What We Love
👍 Interesting historical information
🔍 Links to Wikipedia for more details
🗓️ Displays sunrise/sunset times and day/week numbers
🗓️ Covers events from ancient times to present day
Room to Improve
🕰️ Events only go up to 2015, app may no longer be supported
📅 Can only view current day, no ability to browse past/future dates
🌍 Focuses heavily on negative/tragic events, could use more positive content
Practice and memorize a method for quickly calculating the weekday of any given date. This app is based on John Conway's 1970 mathematical system, allowing you to test your abilities without external tools.
What are the best doomsday method apps for iPhone?
Doomsday Method | Mental Game tops our doomsday method apps ranking as of August 2026, with a 4.5-star average from 2 App Store ratings, and it's free to download.
Are there free doomsday method apps for iPhone?
Yes — 20 of the top doomsday method apps we rank are free to download, including Doomsday Method | Mental Game and Calendarium - About this Day.
Does Doomsday Method | Mental Game have ads or in-app purchases?
Doomsday Method | Mental Game has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
How many doomsday method apps are on the App Store?
We track 250+ doomsday method apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
What is the Doomsday Method app?
The Doomsday Method app teaches you John Horton Conway's technique for calculating the weekday of any given date. It offers learning resources, practice modes, and progress tracking to help you master this skill.
How does the Doomsday Method app work?
The app guides you through understanding the Doomsday Method's principles with engaging slides and interactive examples. You can then practice calculations in the training mode and monitor your improvement.