# Mental arithmetic quiz vs 旅行日记

The clearest difference is update cadence: Mental arithmetic quiz at every 8 days against 旅行日记's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Mental arithmetic quiz ships an update every 8 days, 旅行日记 every 7 months. The most recent releases landed on May 17, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Mental arithmetic quiz | 旅行日记 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 7 months |
| Size | 38 MB | 59 MB |
| Requires iOS | 12.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LiRen Sun](https://appshunter.io/developer/1649265349) | [Lei Sin Sun](https://appshunter.io/developer/1642858673) |

## What reviewers say

### Mental arithmetic quiz

[App page](https://appshunter.io/ios/app/mental-arithmetic-quiz/id6443785734)

**Features:** macOS Compatibility

**In-app purchases:** none


### 旅行日记

[App page](https://appshunter.io/ios/app/id6445844417)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mental arithmetic quiz free?

Mental arithmetic quiz is free to download, with no in-app purchases.

### Is 旅行日记 free?

旅行日记 is free to download, with no in-app purchases.

### Do Mental arithmetic quiz or 旅行日记 have ads?

Neither Mental arithmetic quiz nor 旅行日记 shows ads.

### Which is updated more often, Mental arithmetic quiz or 旅行日记?

Mental arithmetic quiz ships an update every 8 days, and 旅行日记 every 7 months. Most recently, Mental arithmetic quiz was updated on May 17, 2026 and 旅行日记 on September 16, 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.*