# DeerReader vs Sine

The clearest difference is in-app purchases: Sine at none against DeerReader's 1. Sine also leads on update cadence (every 2 weeks vs every 5 weeks) and ratings volume (7 vs 2). DeerReader's advantage is device support (4 vs 2). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. DeerReader sells 1 in-app purchase, starting at $9.99 per year. Sine asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for DeerReader against 4.9 for Sine. Both are backed by a comparable volume of ratings — 2 and 7 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

DeerReader ships an update every 5 weeks, Sine every 2 weeks. Both last shipped on November 5, 2026.

## The numbers

| Metric | DeerReader | Sine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/deerreader-audiobook-player/id6748619971/reviews)** | [4.9 (7 ratings)](https://appshunter.io/ios/app/sine-audiobook-player-mp3m4b/id6763369554/reviews) |
| Number of ratings | 2 | **7** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Paid | **Free** |
| Size | 27 MB | 9 MB |
| Requires iOS | 26.1 | **17.0** |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Cloverfield Technologies LLC](https://appshunter.io/developer/1744210662) | [Dallen Burwell](https://appshunter.io/developer/1895284074) |

## What reviewers say

### DeerReader

[App page](https://appshunter.io/ios/app/deerreader-audiobook-player/id6748619971)

Organize and listen to your digital audiobooks with a beautiful, intelligent player. Features adaptive UI, fast search, and automatic sorting into collections using AI. Enjoy a seamless listening experience with home screen widget access.

**Highlights:** Adaptive player UI matching audiobook cover, Fast, unified search for books and authors, Home screen widget for instant access, AI-powered automatic organization into collections, Intuitive playback controls, Support for large digital libraries

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Support Subscription | $9.99 | per year |


### Sine

[App page](https://appshunter.io/ios/app/sine-audiobook-player-mp3m4b/id6763369554)

This app allows you to import and listen to your own audiobooks in various formats. It offers advanced playback controls, chapter navigation, a sleep timer, and a unique silence skipping feature to save listening time. Your privacy is protected with no accounts or tracking.

**Highlights:** Import MP3, M4B, M4A, FLAC, AAC files, Variable playback speed, Chapter navigation and bookmarks, Sleep timer with fade, Skip Silence feature, 10-band equalizer, CarPlay and widget support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DeerReader free?

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

### Is Sine free?

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

### Which has better reviews, DeerReader or Sine?

DeerReader is rated higher. DeerReader averages 5.0 out of 5 from 2 ratings, while Sine averages 4.9 from 7 ratings.

### Do DeerReader or Sine have ads?

Neither DeerReader nor Sine shows ads.

### Which is updated more often, DeerReader or Sine?

DeerReader ships an update every 5 weeks, and Sine every 2 weeks. Most recently, DeerReader was updated on November 5, 2026 and Sine 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.*