# 音耳せん vs Big Timer

The clearest difference is in-app purchases: 音耳せん at none against Big Timer's 1. 音耳せん also leads on iOS requirement (13.0 vs 18.6). Big Timer's advantage is update cadence (every 6 days vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Big Timer sells 1 one-off in-app purchase. 音耳せん asks for nothing beyond the download.

音耳せん ships an update every 5 weeks, Big Timer every 6 days. The most recent releases landed on September 27, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 音耳せん | Big Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Every 6 days** |
| Size | 29 MB | 16 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [koji kamogawa](https://appshunter.io/developer/1488210713) | [Tsukutena](https://appshunter.io/developer/6786964253) |

## What reviewers say

### 音耳せん

[App page](https://appshunter.io/ios/app/id1496478545)

**Features:** macOS Compatibility

**In-app purchases:** none


### Big Timer

[App page](https://appshunter.io/ios/app/big-timer-countdown-and-repeat/id6786964251)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $3.99 | one-time |


## Frequently asked questions

### Is 音耳せん free?

音耳せん is free to download, with no in-app purchases.

### Is Big Timer free?

Big Timer is free to download, with in-app purchases available.

### Do 音耳せん or Big Timer have ads?

Both 音耳せん and Big Timer show ads.

### Which is updated more often, 音耳せん or Big Timer?

音耳せん ships an update every 5 weeks, and Big Timer every 6 days. Most recently, 音耳せん was updated on September 27, 2026 and Big Timer on September 21, 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.*