# Mental Math for Work vs 日常計算

The clearest difference is ads: Mental Math for Work at none against 日常計算's shown. 日常計算's advantage is iOS requirement (15.1 vs 18.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Mental Math for Work sells 2 in-app purchases, starting at $1.99 per month and 日常計算 sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Mental Math for Work ships an update every 9 days, 日常計算 every 2 weeks. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Mental Math for Work | 日常計算 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Size | 15 MB | 57 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shota Morioka](https://appshunter.io/developer/483674380) | [SYSTEM TAMAYA](https://appshunter.io/developer/1847130603) |

## What reviewers say

### Mental Math for Work

[App page](https://appshunter.io/ios/app/mental-math-for-work/id6766879948)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |
| Premium Lifetime | $9.99 | one-time |


### 日常計算

[App page](https://appshunter.io/ios/app/id6785873221)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム月額プラン | $1.99 | per month |
| 広告を削除 | $1.99 | one-time |


## Frequently asked questions

### Is Mental Math for Work free?

Mental Math for Work is free to download, with in-app purchases available.

### Is 日常計算 free?

日常計算 is free to download, with in-app purchases available.

### Do Mental Math for Work or 日常計算 have ads?

日常計算 shows ads; Mental Math for Work does not.

### Which is updated more often, Mental Math for Work or 日常計算?

Mental Math for Work ships an update every 9 days, and 日常計算 every 2 weeks. Most recently, Mental Math for Work was updated on October 14, 2026 and 日常計算 on October 8, 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.*