Doomsday calculator memory vs WeekdayWidget
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Doomsday calculator memory
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.
- Practice date calculations
- Memorize weekday method
- Based on John Conway's system
- No external tools needed
- Test your abilities
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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.
WeekdayWidget
Master the 'Human Calendar' trick to mentally calculate the day of the week for any date. This app offers tutorials, guided practice, and training games to help you learn and perfect this skill.
- Learn 'Human Calendar' trick
- Text and video tutorials
- Guided Solve mode
- Training minigames
- Speedrun mode
- Customizable date range
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Want to learn the ‘Human Calendar’ trick and quickly calculate the day of the week for any calendar date in your head? WeekdayWidget is the definitive platform for learning, training, and performing mental weekday calculation. It has never been easier to learn this skill- in addition to the comprehensive text and video tutorials, WeekdayWidget features an exclusive ‘Guided Solve’ mode that walks you step by step through the full process until you’re ready to solve on your own! The app also features: - Sleek user interface with unlockable themes - Training minigames for practicing individual steps in the full process - Speedrun mode based on official Memoriad categories - Text-to-speech functionality to emulate spoken performances - Fully customizable date range from 1600 - 2100 …and more! Whether you’re learning for a mathematics demonstration, training for Mental Olympics competition, or just picking up a neat party trick, WeekdayWidget’s flexibility makes it the ideal platform no matter the use case. ‘Doomsday’ algorithm inventor John Conway was famously able to calculate any weekday in under two seconds… Can you beat that?
Screenshots
Verdict
The clearest difference is ratings volume: WeekdayWidget at 10 against Doomsday calculator memory's 1. WeekdayWidget also leads on iOS requirement (12.0 vs 17.6). On price, rating, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Doomsday calculator memory against 5.0 for WeekdayWidget. That said, the two scores are not equally well evidenced: WeekdayWidget has 10 ratings behind it against 1, so its average is the more settled of the two.
| Parameter | Doomsday calculator memory | WeekdayWidget |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (10 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 10 — better |
| Update frequency | Every 8 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Joao Vianna | Jasper Murphy |
Customer experience
Doomsday calculator memory
WeekdayWidget
In-app purchases
Doomsday calculator memory
No in-app purchases
WeekdayWidget
No in-app purchases
Questions
Is Doomsday calculator memory free?
Is WeekdayWidget free?
Which has better reviews, Doomsday calculator memory or WeekdayWidget?
Do Doomsday calculator memory or WeekdayWidget have ads?
Other comparisons
