# Work Rhythm vs Yakusoku.

The clearest difference is in-app purchases: Yakusoku. at none against Work Rhythm's 4. Yakusoku. also leads on ads (none vs shown). Work Rhythm's advantage is iOS requirement (13.0 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Work Rhythm sells 4 in-app purchases, starting at $0.99 per month. Yakusoku. asks for nothing beyond the download.

Work Rhythm ships an update every 9 days, Yakusoku. weekly. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Work Rhythm | Yakusoku. |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 106 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Rui Hashimoto](https://appshunter.io/developer/1715704650) | [Shosuke Sato](https://appshunter.io/developer/1709991841) |

## What reviewers say

### Work Rhythm

[App page](https://appshunter.io/ios/app/work-rhythm-bgm-for-focus/id6738783209)

Enhance your work and study sessions with calming background music. This app offers curated playlists, focus timers, and continuous playback to boost productivity and relaxation. Enjoy a user-friendly interface designed for seamless integration into your daily routine.

**Highlights:** Varied playlists for work, study, and relaxation, Focus and break timers, Save favorite tracks, Continuous playback with auto-switching, Background playback support, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Member | $0.99 | per month |
| コーヒー1杯応援 | $0.99 | one-time |
| ランチ応援 | $0.99 | one-time |
| 本気応援パック | $5.99 | one-time |


### Yakusoku.

[App page](https://appshunter.io/ios/app/yakusoku/id6762287005)

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

**In-app purchases:** none


## Frequently asked questions

### Is Work Rhythm free?

Work Rhythm is free to download, with in-app purchases available.

### Is Yakusoku. free?

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

### Do Work Rhythm or Yakusoku. have ads?

Work Rhythm shows ads; Yakusoku. does not.

### Which is updated more often, Work Rhythm or Yakusoku.?

Work Rhythm ships an update every 9 days, and Yakusoku. weekly. Most recently, Work Rhythm was updated on November 4, 2026 and Yakusoku. on November 9, 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.*