# Beat Book vs KUU

The clearest difference is in-app purchases: Beat Book at none against KUU's 3. Beat Book also leads on ads (none vs shown) and iOS requirement (12.0 vs 26.0). KUU's advantage is update cadence (every 3 days vs every 10 days). On price and device support there is nothing between them.

Both are free to download. KUU sells 3 in-app purchases, starting at $5.99 per month. Beat Book asks for nothing beyond the download.

Beat Book ships an update every 10 days, KUU every 3 days. The most recent releases landed on November 8, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Beat Book | KUU |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (9 ratings)](https://appshunter.io/ios/app/kuu-overthinking-brain-dump/id6771264775/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 51.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 36 MB | 36 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Ryo Nishimura](https://appshunter.io/developer/1706573326) | [Shunya Yamashita](https://appshunter.io/developer/1841624282) |

## What reviewers say

### Beat Book

[App page](https://appshunter.io/ios/app/beat-book/id6475659750)

**Features:** Vision Pro support

**In-app purchases:** none


### KUU

[App page](https://appshunter.io/ios/app/kuu-overthinking-brain-dump/id6771264775)

This app provides a voice-first method for offloading scattered thoughts, worries, and ideas. It transcribes your spoken words and categorizes them into 'Now', 'Later', 'Park', and 'Let go' sections to help clear your mind.

**Highlights:** Voice-to-text transcription, Thought categorization (Now, Later, Park, Let go), ADHD-friendly design, Private iCloud sync, Menu bar integration for Mac, No raw audio storage

**Features:** Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KUU+ Monthly | $5.99 | per month |
| KUU+ Yearly | $39.99 | per year |
| KUU+ Lifetime | $89.99 | one-time |


## Frequently asked questions

### Is Beat Book free?

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

### Is KUU free?

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

### Do Beat Book or KUU have ads?

KUU shows ads; Beat Book does not.

### Which is updated more often, Beat Book or KUU?

Beat Book ships an update every 10 days, and KUU every 3 days. Most recently, Beat Book was updated on November 8, 2026 and KUU on November 10, 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.*