# Doomsday calculator memory — Test your hability to dates

> Learn and practice calculating weekdays for any date using a mathematical method. (iPhone/iPad app by Joao Vianna.)

- Source: https://appshunter.io/ios/app/doomsday-calculator-memory/id6503307628 (this page in markdown: same URL + `.md`)
- Developer: [Joao Vianna](https://appshunter.io/developer/592830914)
- Category: Education, Entertainment
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.6 · 4 MB
- Languages: English
- Released: 2024-05-30
- Data updated: 2026-06-11
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/doomsday-calculator-memory/id6503307628/reviews.md

## What is Doomsday calculator memory?

In 1970, British mathematician John Conway devised a way to quickly calculate the weekday of any given date without the help of calculators, computers, or calendars. This app helps you to practice and memorize.

## Key features

- Practice date calculations
- Memorize weekday method
- Based on John Conway's system
- No external tools needed
- Test your abilities


## Frequently asked questions about Doomsday calculator memory

### What is Doomsday calculator memory?

Doomsday calculator memory is an educational app that helps users practice and memorize John Conway's method for quickly calculating the weekday of any given date without the need for calculators or calendars.

### How does Doomsday calculator memory work?

The app is based on a mathematical system devised by John Conway in 1970. It allows you to test your ability to determine the weekday for any date through practice exercises.

### Is Doomsday calculator memory suitable for children?

Yes, Doomsday calculator memory has an age rating of 4+, making it suitable for younger users interested in learning mathematical concepts and date calculations.

### What devices support Doomsday calculator memory?

Doomsday calculator memory is available for iPhone and iPad devices, offering a flexible learning experience across Apple's mobile platforms.

### How often is Doomsday calculator memory updated?

The app was last updated on March 9, 2025, indicating recent development and potential for ongoing improvements and feature additions.

### What is the user rating for Doomsday calculator memory?

Doomsday calculator memory has a perfect rating of 5.0 stars based on one review, suggesting a highly positive initial user experience.

### Does Doomsday calculator memory have ads?

No, Doomsday calculator memory does not contain advertisements, providing an uninterrupted learning environment for users.

### Can I track my progress in Doomsday calculator memory?

While the app focuses on practicing and memorizing the calculation method, specific progress tracking features are not detailed in the provided information.

## Version history (last 5 releases)

### 2.3 — 2025-03-09

Now you can control speech voices speed on English, Portuguese, German, Italy and Chinese.

### 2.2 — 2025-03-08

Now use can select English, German, Portuguese or simplified Chinese

### 2.1 — 2025-02-23

New configuration for dates and styles.

### 2.0 — 2025-02-20

Now, the user can select the any year on the configuration.

### 1.0 — 2024-05-30

No release notes.

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| --- | --- | --- | --- |
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All apps by Joao Vianna: https://appshunter.io/developer/592830914

## Related topics

[doomsday method](https://appshunter.io/ios/topics/doomsday-method)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*