# UnderBooks vs Kuka

The clearest difference is in-app purchases: Kuka at none against UnderBooks's 10. Kuka also leads on ads (none vs shown). UnderBooks's advantage is review sentiment (76% vs 68%). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. UnderBooks sells 10 in-app purchases, starting at $2.99 per 7 days. Kuka asks for nothing beyond the download.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | UnderBooks | Kuka |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (18 ratings)](https://appshunter.io/ios/app/underbooks/id1670343606/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | **76.5% of reviews** | 68.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 84 MB | 60 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Hryhorii Cherkaskyi](https://appshunter.io/developer/1670343608) | [Kuka Limited Liability Company](https://appshunter.io/developer/1746293989) |

## What reviewers say

### UnderBooks

[App page](https://appshunter.io/ios/app/underbooks/id1670343606)

Discover a curated collection of Ukrainian audiobooks featuring classic and contemporary authors. Enjoy professionally narrated literary works and unique illustrations, perfect for busy individuals seeking quality literature on the go.

**Highlights:** Ukrainian audiobooks, Classic and contemporary literature, Professional narration, Original illustrations, Curated literary collection, Offline listening

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UnderBooks Pro 1 Week | $2.99 | per 7 days |
| UnderBooks Pro | $7.99 | per month |
| UnderBooks Pro 6 months | $12.99 | per 6 months |
| UnderBooks Pro Annual | $24.99 | per year |
| UnderBook "Medium" | $2.99 | one-time |
| UnderBook "Big" | $3.99 | one-time |
| UnderBook "Big+" | $5.99 | one-time |
| 1 month subscription | $7.99 | one-time |
| Підписка на 6 місяців | $12.99 | one-time |
| 1 year subscription | $24.99 | one-time |


### Kuka

[App page](https://appshunter.io/ios/app/kuka/id6468996442)

This app provides a corporate e-reading service for companies, offering unlimited access to a vast library of e-books. Employees can read at their own pace, anytime, anywhere, even offline, fostering development and entertainment within teams.

**Highlights:** Thousands of e-books, New releases and classics, Professional, fiction, non-fiction, Unlimited reading access, Offline reading capability, Read at own pace

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

**In-app purchases:** none

**What reviewers like**

- 👍 Excellent design and interface
- 📚 Large selection of books
- ✅ Convenient to use
- 💡 Option to send to e-reader
- ❤️ Ukrainian content appreciated

**What reviewers complain about**

- 🐛 Search not working after update
- 🐛 Font size issues
- 🐛 Bookmarks not saving
- 🐛 Progress not saved
- 🐛 PDF files not opening/displaying correctly

**Reported bugs**

- Search results disappear after appearing
- Cannot save reading progress
- Cannot save bookmarks
- Books not seen as being read after completion
- Fonts change randomly

**Requested features**

- Ability to view all quotes and notes
- Integration with PocketBook
- Option to see what family is reading
- Page-by-page view mode
- Ability to leave reviews on books


## Frequently asked questions

### Is UnderBooks free?

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

### Is Kuka free?

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

### Do UnderBooks or Kuka have ads?

UnderBooks shows ads; Kuka does not.

### Which is updated more often, UnderBooks or Kuka?

UnderBooks ships an update monthly, and Kuka monthly. Most recently, UnderBooks was updated on September 23, 2026 and Kuka on September 19, 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.*