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Doomsday Method: Day of Week

Doomsday Method: Day of Week

Name the weekday of any date

3 ratings
4 reviews
🎮 Games
📚 Education
🎈 Casual
🧠 Trivia
Free
In-App Purchases

Details

Released
June 12, 2023
Updated
October 25, 2026

Features

Developer

Leon Grimmeisen
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Doomsday Method: Day of Week screenshot #1 for iPhone
Doomsday Method: Day of Week screenshot #2 for iPhone
Doomsday Method: Day of Week screenshot #3 for iPhone
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Doomsday Method: Day of Week screenshot #5 for iPhone
Doomsday Method: Day of Week screenshot #6 for iPhone
Doomsday Method: Day of Week screenshot #7 for iPhone
🧾$9.99
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About

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.

✓Learn Doomsday Method principles
✓Interactive examples and tips
✓Dedicated training mode
✓Progress tracking and statistics
✓User-friendly interface
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What's New in Doomsday Method

2.2.3

October 25, 2026

Bug fixes and small improvements.

1

Subscriptions & In-App Purchases

$9.99

Doomsday Pro

Doomsday Pro

User reviews

Most RecentHighest RatedLowest Rated

Fast Perfekt

Nach einigen Monaten gemerkt, dass es inzwischen ein großes neues Update gab und ich liebe die ganzen Änderungen + Leaderboards und Tutorials. Nur noch eine kleine Bitte für die Zukunft: Dark Mode 🤓
44894298

Response from developer

Danke für das ausführliche Feedback! Der Bug mit den falschen Datumsberechnungen wurde im neuesten Update behoben. Die Ideen mit dem Datumsformat und dem einstellbaren Zeitraum für den Generator finde ich richtig gut, ich nehme das auf jeden Fall auf die Liste für zukünftige Updates. Probier gerne die neue Version aus und melde dich, wenn dir noch etwas auffällt! Wenn du zufrieden bist, würde ich mich riesig über eine aktualisierte Bewertung freuen, das hilft als kleine App enorm! 🙏

Overall good!

A good trainer. Some dates you get correct, but the statement below says a different day of the week. Small bug I’m sure is an easy fix.

Would love an Apple Watch version too!!!
ZZatchmo1988

Response from developer

Thanks for the review and for catching that! You're right, there was a bug affecting some date calculations. Great news: I just released an update that fixes this issue. Give it a try and let me know if everything checks out now. If you're happy with the fix, I'd really appreciate it if you considered updating your rating, it helps a lot as a small indie app! 🙏

Macht genau was es soll !

Eine sehr einfach und übersichtlich gehaltene App. Wäre noch ganz nett wenn man andere Jahrhunderte reinbringen könnte. Ansonsten eine super Sache..auch die Statistiken sind super übersichtlich 👍🏻
Jjubiel878

Response from developer

Vielen lieben Dank für das positive Feedback! Zur Info, du kannst in den Einstellungen die Schwirigkeit anpassen, was dann auch andere Jahrhunderte freischaltet, viel Spaß damit! :)

Overall great!

Updated review - works great 5 stars!

Would love an Apple Watch version too!!!
ZZatchmo1988

Response from developer

Thanks for the review and for catching that! You're right, there was a bug affecting some date calculations. Great news: I just released an update that fixes this issue. Give it a try and let me know if everything checks out now. If you're happy with the fix, I'd really appreciate it if you considered updating your rating, it helps a lot as a small indie app! 🙏

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FAQ

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.

Is the Doomsday Method app suitable for beginners?

Yes, the app is designed for curious learners and provides a user-friendly interface to make mastering the weekday calculation technique accessible to everyone.

Can I track my progress in the Doomsday Method app?

Absolutely. The app features detailed statistics to track your performance, highlighting areas of strength and suggesting areas for further practice, helping you see your skills improve over time.

What devices does the Doomsday Method app support?

Currently, the Doomsday Method app is supported on iPhone devices.

How often is the Doomsday Method app updated?

The latest version is 1.1, and the app was last updated on April 28, 2026. This indicates a recent update, suggesting ongoing development and support.

Does the Doomsday Method app have ads?

No, the Doomsday Method app is ad-free, providing an uninterrupted learning experience.

What is the age rating for the Doomsday Method app?

The Doomsday Method app has an age rating of 4+, making it suitable for a wide range of users interested in learning.