# numoku vs Doomsday Method | Mental Game

The clearest difference is rating: numoku at 5.0 against Doomsday Method | Mental Game's 4.7. numoku also leads on ratings volume (26 vs 3) and device support (3 vs 1). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

numoku holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: numoku has 26 ratings behind it against 3, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

numoku ships an update every 2 months, Doomsday Method | Mental Game monthly. The most recent releases landed on September 30, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | numoku | Doomsday Method | Mental Game |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (26 ratings)](https://appshunter.io/ios/app/numoku/id1249691609/reviews)** | [4.7 (3 ratings)](https://appshunter.io/ios/app/doomsday-method-mental-game/id6447447000/reviews) |
| Number of ratings | **26** | 3 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free | Free |
| Size | 18 MB | 10 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [tk2 labs](https://appshunter.io/developer/1249691608) | [Leon Grimmeisen](https://appshunter.io/developer/1654025400) |

## What reviewers say

### numoku

[App page](https://appshunter.io/ios/app/numoku/id1249691609)

A fast-paced math game challenging players to find equations within a time limit. Earn points for creativity and complexity while practicing arithmetic and algebraic principles. Play solo, with friends, or against AI opponents.

**Highlights:** Equation discovery, Time-based challenges, Bonus points for creativity, Multiplayer modes, AI practice opponent, Arithmetic and algebra practice

**Features:** macOS Compatibility

**In-app purchases:** none


### Doomsday Method | Mental Game

[App page](https://appshunter.io/ios/app/doomsday-method-mental-game/id6447447000)

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.

**Highlights:** Learn Doomsday Method principles, Interactive examples and tips, Dedicated training mode, Progress tracking and statistics, User-friendly interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is numoku free?

numoku is free to download, with no in-app purchases.

### Is Doomsday Method | Mental Game free?

Doomsday Method | Mental Game is free to download, with no in-app purchases.

### Which has better reviews, numoku or Doomsday Method | Mental Game?

numoku is rated higher. numoku averages 5.0 out of 5 from 26 ratings, while Doomsday Method | Mental Game averages 4.7 from 3 ratings.

### Do numoku or Doomsday Method | Mental Game have ads?

Neither numoku nor Doomsday Method | Mental Game shows ads.

### Which is updated more often, numoku or Doomsday Method | Mental Game?

numoku ships an update every 2 months, and Doomsday Method | Mental Game monthly. Most recently, numoku was updated on September 30, 2026 and Doomsday Method | Mental Game on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*