# Spine vs Sutra

The clearest difference is rating: Spine at 4.8 against Sutra's 4.3. Spine also leads on in-app purchases (none vs 4) and review sentiment (86% vs 73%). Sutra's advantage is iOS requirement (17.0 vs 26.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Sutra sells 4 one-off in-app purchases. Spine asks for nothing beyond the download.

Spine holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 30 and 17 respectively. Written reviews point the same way: 86% of Spine's written reviews are positive against 73% of Sutra's.

Spine ships an update every 4 days, Sutra weekly. Both last shipped on October 25, 2026.

## The numbers

| Metric | Spine | Sutra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (30 ratings)](https://appshunter.io/ios/app/spine-audiobook-player/id6764636615/reviews)** | [4.3 (17 ratings)](https://appshunter.io/ios/app/sutra-ebook-and-comic-reader/id6780096864/reviews) |
| Number of ratings | **30** | 17 |
| Positive reviews | **85.7% of reviews** | 73.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | Free | Free |
| Size | 15 MB | 42 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Accelyze Inc.](https://appshunter.io/developer/1895859588) | [Koustav Dasgupta](https://appshunter.io/developer/6772577121) |

## What reviewers say

### Spine

[App page](https://appshunter.io/ios/app/spine-audiobook-player/id6764636615)

This app enhances audiobook listening with features like listener levels, daily streaks, and shareable year-end recaps. It offers a beautiful, integrated player and syncs with Hardcover, all while keeping your data private on-device.

**Highlights:** Integrated audiobook player, Listener levels and daily streaks, Hardcover sync, On-device AI summaries, Shareable year-in-review recap, Lock screen and widget controls

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

**In-app purchases:** none


### Sutra

[App page](https://appshunter.io/ios/app/sutra-ebook-and-comic-reader/id6780096864)

Access your entire book collection from various sources in one beautiful app. Enjoy a customizable reading experience with synced progress, bookmarks, and highlights across devices. Organize your library with series info, search, and collections.

**Highlights:** Connect Kavita, Calibre, and OPDS servers, EPUB and PDF reading with page-curl effect, Rich typography and reading themes, iCloud sync for progress, bookmarks, and highlights, Offline downloads, Highlighting and search functionality, Series grouping and collections

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $1.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |
| Sutra Pro | $6.99 | one-time |


## Frequently asked questions

### Is Spine free?

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

### Is Sutra free?

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

### Which has better reviews, Spine or Sutra?

Spine is rated higher. Spine averages 4.8 out of 5 from 30 ratings, while Sutra averages 4.3 from 17 ratings.

### Do Spine or Sutra have ads?

Neither Spine nor Sutra shows ads.

### Which is updated more often, Spine or Sutra?

Spine ships an update every 4 days, and Sutra weekly. Most recently, Spine was updated on October 25, 2026 and Sutra on October 25, 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.*