# RemNum 〜 数字を暗記するだけのアプリ vs Chess Puzzles

The clearest difference is in-app purchases: RemNum 〜 数字を暗記するだけのアプリ at none against Chess Puzzles's 3. RemNum 〜 数字を暗記するだけのアプリ also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Chess Puzzles sells 3 in-app purchases, starting at $4.99 per 7 days. RemNum 〜 数字を暗記するだけのアプリ asks for nothing beyond the download.

RemNum 〜 数字を暗記するだけのアプリ ships an update every 3 weeks, Chess Puzzles every 2 weeks. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | RemNum 〜 数字を暗記するだけのアプリ | Chess Puzzles |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 48 MB | 5 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [yoshitomo ishii](https://appshunter.io/developer/1495140436) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### RemNum 〜 数字を暗記するだけのアプリ

[App page](https://appshunter.io/ios/app/remnum/id6504561429)

**Features:** macOS Compatibility

**In-app purchases:** none


### Chess Puzzles

[App page](https://appshunter.io/ios/app/chess-puzzles-daily-tactics/id6771032011)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fork & Pin Drills · Weekly | $4.99 | per 7 days |
| Endgame Mastery · Yearly | $24.99 | per year |
| Checkmate Trainer - Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is RemNum 〜 数字を暗記するだけのアプリ free?

RemNum 〜 数字を暗記するだけのアプリ is free to download, with no in-app purchases.

### Is Chess Puzzles free?

Chess Puzzles is free to download, with in-app purchases available.

### Do RemNum 〜 数字を暗記するだけのアプリ or Chess Puzzles have ads?

Neither RemNum 〜 数字を暗記するだけのアプリ nor Chess Puzzles shows ads.

### Which is updated more often, RemNum 〜 数字を暗記するだけのアプリ or Chess Puzzles?

RemNum 〜 数字を暗記するだけのアプリ ships an update every 3 weeks, and Chess Puzzles every 2 weeks. Most recently, RemNum 〜 数字を暗記するだけのアプリ was updated on October 21, 2026 and Chess Puzzles on October 13, 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.*