# 集中タイマー vs KEEPER

The clearest difference is price: 集中タイマー at Free against KEEPER's $0.99. KEEPER's advantage is ads (none vs shown) and update cadence (every 4 days vs every 9 months). On in-app purchases, device support and iOS requirement there is nothing between them.

集中タイマー is free to download; KEEPER costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

集中タイマー ships an update every 9 months, KEEPER every 4 days. Both last shipped on October 6, 2026.

## The numbers

| Metric | 集中タイマー | KEEPER |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 4 days** |
| Size | 28 MB | 14 MB |
| Requires iOS | 15.0 | **14.4** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kousaka Kirino](https://appshunter.io/developer/1037180476) | [hideo nakamura](https://appshunter.io/developer/1242808811) |

## What reviewers say

### 集中タイマー

[App page](https://appshunter.io/ios/app/id6446185573)

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

**In-app purchases:** none


### KEEPER

[App page](https://appshunter.io/ios/app/keeper-time-management-tool/id6502432858)

**In-app purchases:** none


## Frequently asked questions

### Is 集中タイマー free?

集中タイマー is free to download, with no in-app purchases.

### Is KEEPER free?

KEEPER costs $0.99, with no in-app purchases.

### Do 集中タイマー or KEEPER have ads?

集中タイマー shows ads; KEEPER does not.

### Which is updated more often, 集中タイマー or KEEPER?

集中タイマー ships an update every 9 months, and KEEPER every 4 days. Most recently, 集中タイマー was updated on October 6, 2026 and KEEPER on October 6, 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.*