Undulib vs Booken
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Undulib
This app is a dedicated audio player designed for audiobook and audio drama enthusiasts. It allows users to easily separate their collections and offers advanced playback features like chapter support, dual progress indicators, and a sleep timer.
- Separates audiobooks from audio dramas
- Supports embedded chapters
- Supports multi-track books
- Dual progress indicators (total and chapter)
- Remembers playback position
- Sleep timer
- Supports DRM for Audible and iTunes books
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The audiobook player for audiodrama enthusiast. Keep your audiobook's separated from your audio drama collection. It's as easy as adding #audiodrama to the comments in iTunes. Supports embedded chapters and multi-track books. Two progress indicators, one for the total length and another for chapter length. Remembers playback position Includes a sleep timer Uses iTunes to manage your media and obeys sort metadata such as "Sort Title" Supports Audible and iTunes books with DRM (iOS 8 does not support DRM chapters) Works with external headset or car stereo controls If you're not interested in audiodramas Undulib is also an excellent audiobook player. Listen Smarter. Listen with Undulib!
Booken
This app provides a simple and efficient way to listen to your audiobook files. It offers features for importing, managing, and tracking your listening progress, with playback controls accessible from your phone and Apple Watch.
- Import own audiobook files
- Track listening progress
- Mark books as finished
- Lock screen playback controls
- Apple Watch companion app
- Variable scrubbing speed
- Adjustable playback speed
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A lightweight and easy to use player for your audiobook files. Manage your files - Import your own files straight into the app - Manage and see the progress of the books you've listened to - Mark books as finished Listening features - Control playback directly from the lock screen/control center or from the Apple Watch companion app - Easily navigate books with variable scrubbing speed and chapter selection - Change playback speed Listen from your watch - Easily download your favorite books to your watch when you need to listen without your phone - Navigate local files on your watch with chapter selection and custom skip duration - Keep your progress synced between your phone and watch with both automatic and manual syncing options
Screenshots
Verdict
The clearest difference is monetization model: Booken at free against Undulib's paid. Undulib's advantage is rating (4.5 vs 4.0) and ratings volume (29 vs 2). On price, review sentiment, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Undulib holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Undulib has 29 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 83% of Undulib's written reviews are positive against 80% of Booken's.
Undulib ships an update monthly, Booken every 2 months. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.
| Parameter | Undulib | Booken |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (29 ratings) — better | 4.0 (2 ratings) |
| Positive reviews | 83.3% of reviews — better | 80.0% of reviews |
| Number of ratings | 29 — better | 2 |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 26 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Charles Butler | Riley Brookins |
Customer experience
Undulib
Booken
In-app purchases
Undulib
No in-app purchases
Booken
No in-app purchases
