# Quick mental calculation vs マウンテンバーガーデコレーション

The clearest difference is update cadence: Quick mental calculation at every 11 days against マウンテンバーガーデコレーション's every 11 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.

Quick mental calculation ships an update every 11 days, マウンテンバーガーデコレーション every 11 months. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Quick mental calculation | マウンテンバーガーデコレーション |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 11 days** | Every 11 months |
| Size | 21 MB | 168 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ERX](https://appshunter.io/developer/513941286) | [Takeru Yui](https://appshunter.io/developer/955414485) |

## What reviewers say

### Quick mental calculation

[App page](https://appshunter.io/ios/app/quick-mental-calculation/id841970890)

**Features:** macOS Compatibility

**In-app purchases:** none


### マウンテンバーガーデコレーション

[App page](https://appshunter.io/ios/app/id6473885962)

**In-app purchases:** none


## Frequently asked questions

### Is Quick mental calculation free?

Quick mental calculation is free to download, with no in-app purchases.

### Is マウンテンバーガーデコレーション free?

マウンテンバーガーデコレーション is free to download, with no in-app purchases.

### Do Quick mental calculation or マウンテンバーガーデコレーション have ads?

Both Quick mental calculation and マウンテンバーガーデコレーション show ads.

### Which is updated more often, Quick mental calculation or マウンテンバーガーデコレーション?

Quick mental calculation ships an update every 11 days, and マウンテンバーガーデコレーション every 11 months. Most recently, Quick mental calculation was updated on October 14, 2026 and マウンテンバーガーデコレーション on October 5, 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.*