# ブレインスリープクロック vs napper

The clearest difference is price: ブレインスリープクロック at Free against napper's $1.99. ブレインスリープクロック also leads on in-app purchases (none vs 1) and ads (none vs shown). napper's advantage is update cadence (daily vs every 12 months). On device support there is nothing between them.

ブレインスリープクロック is free to download; napper costs $1.99 up front. napper sells 1 one-off in-app purchase. ブレインスリープクロック asks for nothing beyond the download.

ブレインスリープクロック ships an update every 12 months, napper daily. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | ブレインスリープクロック | napper |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Daily** |
| Size | 28 MB | 45 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Brain Sleep](https://appshunter.io/developer/1610963812) | [Mitsuhiro Ogata](https://appshunter.io/developer/1709953221) |

## What reviewers say

### ブレインスリープクロック

[App page](https://appshunter.io/ios/app/id1610963911)

**Features:** macOS Compatibility

**In-app purchases:** none


### napper

[App page](https://appshunter.io/ios/app/napper/id6468482248)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 開発者のエナジードリンク代になります！ | $0.49 | one-time |


## Frequently asked questions

### Is ブレインスリープクロック free?

ブレインスリープクロック is free to download, with no in-app purchases.

### Is napper free?

napper costs $1.99, and also offers in-app purchases.

### Do ブレインスリープクロック or napper have ads?

napper shows ads; ブレインスリープクロック does not.

### Which is updated more often, ブレインスリープクロック or napper?

ブレインスリープクロック ships an update every 12 months, and napper daily. Most recently, ブレインスリープクロック was updated on October 6, 2026 and napper on October 4, 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.*