Comparison

VollstR/Kasse vs BookPlayer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

VollstR/Kasse

Features
Read full description

This is your application for specialized publications with added value. Get easily accustomed to the electronic table of contents and the fast and intelligent search in all publications. The work desk function helps you search within an entire publication. Add bookmarks and your own annotations in any desired passage, in the form of texts, images, photos or audio comments. This app offers thus a valuable library of online publications with high performance additional features – all this in an attractive design.

About

BookPlayer

This app provides a dedicated listening experience for audiobooks in M4B, M4A, MP3, and FLAC formats. It offers robust import, management, and playback features, including chapter navigation, variable playback speed, and cloud sync for seamless listening across devices.

Highlights
  • Import audiobooks via AirDrop, Files, iTunes, servers, and zip files
  • Manage library with progress tracking, sorting, and playlists
  • Advanced playback controls including speed, rewind, and volume boost
  • Chapter navigation and lock screen controls
  • Cloud sync for cross-device listening
  • CarPlay and Apple Watch companion app support
Features
Read full description

A wonderful player for your M4B/M4A/MP3/FLAC based audiobooks. Import – Using AirDrop from your Mac or iOS device – From Files and other apps on your device – Via File Sharing in iTunes on your Mac or PC – From your own AudibookShelf or Jellyfin server – Zip files with your folders and books Manage – Maintain and see progress of your books – Mark books as finished – Drag & Drop to sort your library – Create playlists – Automatically play items in turn – Play the first unfinished file by tapping on the playlist artwork – Move files to playlists from the library or import them directly – Edit your book details (title, author, artwork) – Connect to your Hardcover.app account, and track your library progress Listen – Control audio playback from the lock screen, control center or from the companion app on the Apple Watch – Play and navigate books with Chapters – Jump to start of the current book – Change playback speed – Smart rewind – Volume Boost – Support for remote events from headset buttons and the lock screen – Sleep timer with adjustable duration – CarPlay support – VoiceOver support – Dolby Atmos support – Dark mode for night owls – Continue listening across your devices with Cloud Sync, including stand alone playback on your Apple Watch Supported M4B/M4A/MP3 BookPlayer is licensed under GNU General Public License v3.0. The source code and a list of all its contributors can be found on the GitHub page of this project at www.github.com/TortugaPower/BookPlayer You can see our Privacy policy and terms of use in the following links: – https://github.com/TortugaPower/BookPlayer/blob/main/PRIVACY_POLICY.md – https://github.com/TortugaPower/BookPlayer/blob/main/TERMS_CONDITIONS.md For help and ways to contribute to the project see the support section in the Settings screen of BookPlayer or visit www.bookplayer.app If you enjoy BookPlayer, we would be glad if you consider writing a review.

Screenshots

VollstR/Kasse4 screens
BookPlayer4 screens

Verdict

The call

The clearest difference is in-app purchases: VollstR/Kasse at none against BookPlayer's 15. VollstR/Kasse also leads on iOS requirement (16.0 vs 26.0). BookPlayer's advantage is update cadence (every 9 days vs every 5 months) and chart position (#78 vs unranked). On price, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. BookPlayer sells 11 in-app purchases, starting at $1.99 per month. VollstR/Kasse asks for nothing beyond the download.

UpkeepUpdate frequency

VollstR/Kasse ships an update every 5 months, BookPlayer every 9 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 7 level
VollstR/Kasse versus BookPlayer: the parameters behind the verdict, then further details
ParameterVollstR/KasseBookPlayer
PriceFreeFree
Rating—4.8 (20K ratings) — better
Positive reviews—82.6% of reviews
Number of ratings—20K — better
Update frequencyEvery 5 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
Best chart rank—#78 — better
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS16.0 — better26.0
Further details — not scored
Size18 MB81 MB
Age rating4+4+
DeveloperVerlag W. Reckinger GmbH & Co. KGGianni Carlo

Bugs and requests

VollstR/Kasse

Not enough reviews yet to summarise bugs or requests.

BookPlayer

Reported bugs

3 issues
  • Playback issues with certain audio formats
  • Importing problems with large audiobook libraries
  • Crashes when deleting books

Requested features

6 requests
  • Bookmark management
  • Percentage completion tracking
  • Improved multi-file book handling
  • Customizable sleep timer
  • iCloud/cloud sync between devices
Show 1 more
  • Siri/Shortcuts integration

In-app purchases

None

VollstR/Kasse

No in-app purchases

11 purchases

BookPlayer

Subscriptions7
  • Support Monthly (1 Month)$1.991 Month
  • Support Monthly (1 Month)$2.991 Month
  • Support Monthly (1 Month)$3.991 Month
Show 4 more
  • Pro Monthly (1 Month)$4.991 Month
  • Support Monthly (1 Month)$6.991 Month
  • Support Monthly (1 Month)$9.991 Month
  • Pro Yearly (1 Year)$49.991 Year
One-time4
  • Kind tip$2.99
  • Kind Tip$2.99
  • Excellent Tip2 variants$4.99
Show 1 more
  • Incredible Tip2 variants$9.99

Questions

Is VollstR/Kasse free?
VollstR/Kasse is free to download, with no in-app purchases.
Is BookPlayer free?
BookPlayer is free to download, with in-app purchases available.
Do VollstR/Kasse or BookPlayer have ads?
Neither VollstR/Kasse nor BookPlayer shows ads.
Which is updated more often, VollstR/Kasse or BookPlayer?
VollstR/Kasse ships an update every 5 months, and BookPlayer every 9 days. Most recently, VollstR/Kasse was updated on October 24, 2026 and BookPlayer on October 31, 2026.

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