# AudioBookSync vs Tandem Books

The clearest difference is in-app purchases: Tandem Books at none against AudioBookSync's 1. Tandem Books also leads on update cadence (weekly vs every 2 weeks). AudioBookSync's advantage is iOS requirement (18.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. AudioBookSync sells 1 one-off in-app purchase. Tandem Books asks for nothing beyond the download.

AudioBookSync ships an update every 2 weeks, Tandem Books weekly. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | AudioBookSync | Tandem Books |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/tandem-books/id6762330517/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 12 MB | 11 MB |
| Requires iOS | **18.6** | 26.0 |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Hans-Peter Jordi](https://appshunter.io/developer/1879027494) | [Mick Johnson](https://appshunter.io/developer/1893843983) |

## What reviewers say

### AudioBookSync

[App page](https://appshunter.io/ios/app/audiobooksync/id6759492424)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AudioBookSync Pro | $5.99 | one-time |


### Tandem Books

[App page](https://appshunter.io/ios/app/tandem-books/id6762330517)

Seamlessly switch between reading and listening to your books. Import your own DRM-free ebooks and audiobooks, and maintain your exact place as you transition between formats. Enjoy a distraction-free reading experience with customizable text and themes.

**Highlights:** Paired ebook and audiobook playback, Seamless reading/listening transition, Import DRM-free EPUB and M4B/MP3 files, Adjustable text size and spacing, Warm Paper and Night reading themes, No account or subscription required, Privacy-focused, no analytics

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AudioBookSync free?

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

### Is Tandem Books free?

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

### Do AudioBookSync or Tandem Books have ads?

Neither AudioBookSync nor Tandem Books shows ads.

### Which is updated more often, AudioBookSync or Tandem Books?

AudioBookSync ships an update every 2 weeks, and Tandem Books weekly. Most recently, AudioBookSync was updated on October 28, 2026 and Tandem Books on November 5, 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.*