# MIT App vs しまった？ 鍵・電気の消し忘れ防止

The clearest difference is in-app purchases: しまった？ 鍵・電気の消し忘れ防止 at none against MIT App's 2. MIT App's advantage is ads (none vs shown) and update cadence (every 9 days vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. MIT App sells 2 one-off in-app purchases. しまった？ 鍵・電気の消し忘れ防止 asks for nothing beyond the download.

MIT App ships an update every 9 days, しまった？ 鍵・電気の消し忘れ防止 every 5 months. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | MIT App | しまった？ 鍵・電気の消し忘れ防止 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 5 months |
| Size | 59 MB | 8 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [fromKK](https://appshunter.io/developer/445216892) | [Takumi Nakamura](https://appshunter.io/developer/1847153717) |

## What reviewers say

### MIT App

[App page](https://appshunter.io/ios/app/mit-app/id6758517404)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Development | $0.99 | one-time |
| Forgive Past Days | $0.99 | one-time |


### しまった？ 鍵・電気の消し忘れ防止

[App page](https://appshunter.io/ios/app/id6767480624)

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

**In-app purchases:** none


## Frequently asked questions

### Is MIT App free?

MIT App is free to download, with in-app purchases available.

### Is しまった？ 鍵・電気の消し忘れ防止 free?

しまった？ 鍵・電気の消し忘れ防止 is free to download, with no in-app purchases.

### Do MIT App or しまった？ 鍵・電気の消し忘れ防止 have ads?

しまった？ 鍵・電気の消し忘れ防止 shows ads; MIT App does not.

### Which is updated more often, MIT App or しまった？ 鍵・電気の消し忘れ防止?

MIT App ships an update every 9 days, and しまった？ 鍵・電気の消し忘れ防止 every 5 months. Most recently, MIT App was updated on October 11, 2026 and しまった？ 鍵・電気の消し忘れ防止 on October 24, 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.*