# Calibre Sync vs Unraid Manager

The clearest difference is price: Unraid Manager at Free against Calibre Sync's $4.99. Unraid Manager also leads on rating (4.9 vs 3.9) and review sentiment (83% vs 62%). Calibre Sync's advantage is update cadence (weekly vs monthly) and chart position (#169 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Unraid Manager is free to download; Calibre Sync costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Unraid Manager holds the better App Store score, 4.9 against 3.9. That said, the two scores are not equally well evidenced: Calibre Sync has 55 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 62% of Calibre Sync's written reviews are positive against 83% of Unraid Manager's.

Calibre Sync ships an update weekly, Unraid Manager monthly. The most recent releases landed on October 13, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Calibre Sync | Unraid Manager |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [3.9 (55 ratings)](https://appshunter.io/ios/app/calibre-sync/id1609138078/reviews) | **[4.9 (10 ratings)](https://appshunter.io/ios/app/unraid-manager/id6749525537/reviews)** |
| Number of ratings | **55** | 10 |
| Positive reviews | 62.1% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | Paid | **Free** |
| Best chart rank | **#169** | — |
| Size | 128 MB | 12 MB |
| Requires iOS | **15.0** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DUONG THUY PHAM](https://appshunter.io/developer/1795008858) | [CALLUM JAMES TEESDALE](https://appshunter.io/developer/1830938412) |

## What reviewers say

### Calibre Sync

[App page](https://appshunter.io/ios/app/calibre-sync/id1609138078)

**Currently charting:** #169 Top Paid · Utilities (US App Store)

Access and manage your Calibre ebook libraries from various cloud services or wirelessly connect to your desktop. Browse, search, download, and organize your books on your device. Supports multiple libraries and accounts.

**Highlights:** Access Calibre libraries on cloud services, Wireless connection to Calibre, Supports multiple libraries and accounts, Browse, search, and download books, Organize books with filters and sorting, Send books to Kindle

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Access Calibre library anywhere
- 🚀 Syncs easily and quickly
- 💡 Mirrors Calibre library design
- 💡 Viewable and searchable library
- 💡 Downloadable on demand

**What reviewers complain about**

- 🐛 Popup cannot be removed
- 🐛 Sync issues with Calibre v9
- 🐛 Developer non-responsive
- 🐛 App broken since Calibre v9
- 🐛 Deprecated database columns

**Reported bugs**

- Popup reappears every launch
- Calibre version 9 bricked the app
- Database error
- Stopped working since Calibre update
- Error when changing DB

**Requested features**

- More customizability with viewing options
- Integrated ebook reader
- Mark books as favorites
- Calendar feature for reading
- Use configured mail app


### Unraid Manager

[App page](https://appshunter.io/ios/app/unraid-manager/id6749525537)

Remotely monitor and control your Unraid server from your iPhone or iPad. Manage system status, Docker containers, virtual machines, and file shares with a native iOS app. Receive alerts and connect to multiple servers.

**Highlights:** Server Dashboard, Docker Management, Virtual Machine Control, File Share Browsing, System Health Monitoring, Alert Notifications, Multi-Server Support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calibre Sync free?

Calibre Sync costs $4.99, with no in-app purchases.

### Is Unraid Manager free?

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

### Which has better reviews, Calibre Sync or Unraid Manager?

Unraid Manager is rated higher. Calibre Sync averages 3.9 out of 5 from 55 ratings, while Unraid Manager averages 4.9 from 10 ratings.

### Do Calibre Sync or Unraid Manager have ads?

Neither Calibre Sync nor Unraid Manager shows ads.

### Which is updated more often, Calibre Sync or Unraid Manager?

Calibre Sync ships an update weekly, and Unraid Manager monthly. Most recently, Calibre Sync was updated on October 13, 2026 and Unraid Manager on September 30, 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.*