# Number Memory 25 vs Chart Dojo 100

The clearest difference is price: Chart Dojo 100 at Free against Number Memory 25's $0.99. Chart Dojo 100 also leads on in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.

Chart Dojo 100 is free to download; Number Memory 25 costs $0.99 up front. Number Memory 25 sells 1 one-off in-app purchase. Chart Dojo 100 asks for nothing beyond the download.

Number Memory 25 ships an update every 3 weeks, Chart Dojo 100 fortnightly. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Number Memory 25 | Chart Dojo 100 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/number-memory-25/id6448686063/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Paid | — |
| Size | 3 MB | 11 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [T&T United Inc.](https://appshunter.io/developer/468282934) | [takuya yukimoto](https://appshunter.io/developer/1527628148) |

## What reviewers say

### Number Memory 25

[App page](https://appshunter.io/ios/app/number-memory-25/id6448686063)

This brain training app helps improve memory by challenging users to memorize and recall sequences of numbers. Regular, short practice sessions can enhance visual memory and cognitive skills.

**Highlights:** Memorize and recall number sequences, Visual memory training, Daily 30-second practice, Progressive difficulty, Simple, challenging gameplay

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All | Free | one-time |


### Chart Dojo 100

[App page](https://appshunter.io/ios/app/chart-dojo-100-trading-drill/id6816752140)

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

**In-app purchases:** none


## Frequently asked questions

### Is Number Memory 25 free?

Number Memory 25 costs $0.99, and also offers in-app purchases.

### Is Chart Dojo 100 free?

Chart Dojo 100 is free to download, with no in-app purchases.

### Do Number Memory 25 or Chart Dojo 100 have ads?

Neither Number Memory 25 nor Chart Dojo 100 shows ads.

### Which is updated more often, Number Memory 25 or Chart Dojo 100?

Number Memory 25 ships an update every 3 weeks, and Chart Dojo 100 fortnightly. Most recently, Number Memory 25 was updated on October 24, 2026 and Chart Dojo 100 on October 29, 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.*