# Calibre Sync vs Astrysk

The clearest difference is price: Astrysk at Free against Calibre Sync's $4.99. Calibre Sync's advantage is rating (3.9 vs 3.0) and in-app purchases (none vs 4). On review sentiment, update cadence, ads and device support there is nothing between them.

Astrysk is free to download; Calibre Sync costs $4.99 up front. Astrysk sells 4 one-off in-app purchases. Calibre Sync asks for nothing beyond the download.

Calibre Sync holds the better App Store score, 3.9 against 3.0. That said, the two scores are not equally well evidenced: Calibre Sync has 54 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 62% of Calibre Sync's written reviews are positive against 67% of Astrysk's, so the app with the better star average is not the one people write more warmly about.

Calibre Sync ships an update weekly, Astrysk every 8 days. The most recent releases landed on September 24, 2026 and June 24, 2026 respectively.

## The numbers

| Metric | Calibre Sync | Astrysk |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[3.9 (54 ratings)](https://appshunter.io/ios/app/calibre-sync/id1609138078/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/astrysk/id6450632377/reviews) |
| Number of ratings | **54** | 2 |
| Positive reviews | 62.4% of reviews | **66.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Monetization | Paid | **Free** |
| Size | 136 MB | 49 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DUONG THUY PHAM](https://appshunter.io/developer/1795008858) | [Abayomi Ikuru](https://appshunter.io/developer/1500239819) |

## 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


### Astrysk

[App page](https://appshunter.io/ios/app/astrysk/id6450632377)

This open-source application provides a unified remote control for self-hosted services. It currently supports managing Proxmox servers and running Large Language Models via Ollama, with more features planned.

**Highlights:** Unified remote control, Open-source, Self-hosted manager, Proxmox management, Ollama LLM support

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Me A Soda | $0.99 | one-time |
| Buy Me A Coffee | $2.99 | one-time |
| Buy Me A Beverage | $4.99 | one-time |
| Buy Me A Meal | $9.99 | one-time |


## Frequently asked questions

### Is Calibre Sync free?

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

### Is Astrysk free?

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

### Which has better reviews, Calibre Sync or Astrysk?

Calibre Sync is rated higher. Calibre Sync averages 3.9 out of 5 from 54 ratings, while Astrysk averages 3.0 from 2 ratings.

### Do Calibre Sync or Astrysk have ads?

Neither Calibre Sync nor Astrysk shows ads.

### Which is updated more often, Calibre Sync or Astrysk?

Calibre Sync ships an update weekly, and Astrysk every 8 days. Most recently, Calibre Sync was updated on September 24, 2026 and Astrysk on June 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*