# WHERE'S  NUMBER! vs Arithmetic Train your Brain

The clearest difference is ads: WHERE'S  NUMBER! at none against Arithmetic Train your Brain's shown. Arithmetic Train your Brain's advantage is update cadence (daily vs every 25 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

WHERE'S  NUMBER! ships an update every 25 months, Arithmetic Train your Brain daily. The most recent releases landed on October 13, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | WHERE'S  NUMBER! | Arithmetic Train your Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/arithmetic-train-your-brain/id6451027097/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 25 months | **Daily** |
| Monetization | — | Ad-supported |
| Size | 40 MB | 64 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [mieko kamiya](https://appshunter.io/developer/544279597) | [minoru yamazaki](https://appshunter.io/developer/1449437588) |

## What reviewers say

### WHERE'S  NUMBER!

[App page](https://appshunter.io/ios/app/wheres-number/id1611106033)

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

**In-app purchases:** none


### Arithmetic Train your Brain

[App page](https://appshunter.io/ios/app/arithmetic-train-your-brain/id6451027097)

Engage in daily brain training with arithmetic puzzles. Compete against your past performance to improve your calculation skills and stimulate your mind. Enjoy a progressive difficulty system and track your progress with a calendar feature.

**Highlights:** Daily brain training, Compete with past self, Progressive difficulty levels, Four arithmetic operations, Calendar progress tracking, Unlimited play

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WHERE'S  NUMBER! free?

WHERE'S  NUMBER! is free to download, with no in-app purchases.

### Is Arithmetic Train your Brain free?

Arithmetic Train your Brain is free to download, with no in-app purchases.

### Do WHERE'S  NUMBER! or Arithmetic Train your Brain have ads?

Arithmetic Train your Brain shows ads; WHERE'S  NUMBER! does not.

### Which is updated more often, WHERE'S  NUMBER! or Arithmetic Train your Brain?

WHERE'S  NUMBER! ships an update every 25 months, and Arithmetic Train your Brain daily. Most recently, WHERE'S  NUMBER! was updated on October 13, 2026 and Arithmetic Train your Brain on September 23, 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.*