# 集中タイマー vs aiteru?

The clearest difference is ads: aiteru? at none against 集中タイマー's shown. aiteru? also leads on update cadence (daily vs every 9 months). 集中タイマー's advantage is iOS requirement (15.0 vs 17.0). On price, 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.

集中タイマー ships an update every 9 months, aiteru? daily. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | 集中タイマー | aiteru? |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Daily** |
| Size | 28 MB | 36 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kousaka Kirino](https://appshunter.io/developer/1037180476) | [Yasuhiro Maekawa](https://appshunter.io/developer/6790092469) |

## 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


### aiteru?

[App page](https://appshunter.io/ios/app/aiteru/id6790092467)

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

**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 aiteru? free?

aiteru? is free to download, with no in-app purchases.

### Do 集中タイマー or aiteru? have ads?

集中タイマー shows ads; aiteru? does not.

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

集中タイマー ships an update every 9 months, and aiteru? daily. Most recently, 集中タイマー was updated on October 6, 2026 and aiteru? on October 2, 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.*