# Calibre Sync vs Simple Dict Mobile Pro

The clearest difference is rating: Calibre Sync at 3.9 against Simple Dict Mobile Pro's 1.0. Calibre Sync also leads on update cadence (weekly vs every 5 weeks) and ratings volume (55 vs 1). Simple Dict Mobile Pro's advantage is price ($0.49 vs $4.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

Calibre Sync costs $4.99 and Simple Dict Mobile Pro $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

Calibre Sync holds the better App Store score, 3.9 against 1.0. That said, the two scores are not equally well evidenced: Calibre Sync has 55 ratings behind it against 1, so its average is the more settled of the two.

Calibre Sync ships an update weekly, Simple Dict Mobile Pro every 5 weeks. Both last shipped on October 27, 2026.

## The numbers

| Metric | Calibre Sync | Simple Dict Mobile Pro |
| --- | --- | --- |
| Price | $4.99 | **$0.49** |
| Rating | **[3.9 (55 ratings)](https://appshunter.io/ios/app/calibre-sync/id1609138078/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/simple-dict-mobile-pro/id6563146585/reviews) |
| Number of ratings | **55** | 1 |
| Positive reviews | 62.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 5 weeks |
| Monetization | Paid | Paid |
| Size | 128 MB | 36 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DUONG THUY PHAM](https://appshunter.io/developer/1795008858) | [培基 王](https://appshunter.io/developer/1579619014) |

## What reviewers say

### Calibre Sync

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

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


### Simple Dict Mobile Pro

[App page](https://appshunter.io/ios/app/simple-dict-mobile-pro/id6563146585)

This app provides a fast and efficient offline dictionary experience, supporting various formats like zim, mdx, and dsl. It offers multiple search methods and a 'reading area' to save and track your lookups.

**Highlights:** Offline dictionary functionality, Supports zim, mdx, dsl formats, Keyword, regex, and fuzzy search, Reading area for saved entries, Lightweight and high-performance indexing

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

**In-app purchases:** none


## Frequently asked questions

### Is Calibre Sync free?

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

### Is Simple Dict Mobile Pro free?

Simple Dict Mobile Pro costs $0.49, with no in-app purchases.

### Which has better reviews, Calibre Sync or Simple Dict Mobile Pro?

Calibre Sync is rated higher. Calibre Sync averages 3.9 out of 5 from 55 ratings, while Simple Dict Mobile Pro averages 1.0 from 1 ratings.

### Do Calibre Sync or Simple Dict Mobile Pro have ads?

Neither Calibre Sync nor Simple Dict Mobile Pro shows ads.

### Which is updated more often, Calibre Sync or Simple Dict Mobile Pro?

Calibre Sync ships an update weekly, and Simple Dict Mobile Pro every 5 weeks. Most recently, Calibre Sync was updated on October 27, 2026 and Simple Dict Mobile Pro on October 27, 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.*