# Möbius Sync vs Bibliocapsa

The clearest difference is review sentiment: Bibliocapsa at 100% against Möbius Sync's 55%. Bibliocapsa also leads on rating (5.0 vs 3.8) and in-app purchases (none vs 1). Möbius Sync's advantage is ratings volume (140 vs 1) and iOS requirement (14.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Möbius Sync sells 1 one-off in-app purchase. Bibliocapsa asks for nothing beyond the download.

Bibliocapsa holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Möbius Sync has 140 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 55% of Möbius Sync's written reviews are positive against 100% of Bibliocapsa's.

Möbius Sync ships an update every 2 months, Bibliocapsa fortnightly. The most recent releases landed on October 3, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Möbius Sync | Bibliocapsa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (140 ratings)](https://appshunter.io/ios/app/mobius-sync/id1539203216/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bibliocapsa/id6782098615/reviews)** |
| Number of ratings | **140** | 1 |
| Positive reviews | 55.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 23 MB | 8 MB |
| Requires iOS | **14.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pickup Infinity Limited](https://appshunter.io/developer/1118833408) | [John Worthington](https://appshunter.io/developer/6774717064) |

## What reviewers say

### Möbius Sync

[App page](https://appshunter.io/ios/app/mobius-sync/id1539203216)

Synchronize files between your iOS devices and other Syncthing-supported platforms without relying on cloud storage. Manage multiple folders and remote devices, with options for sandbox or experimental cross-app sandbox syncing.

**Highlights:** File synchronization between iOS and other Syncthing devices, No cloud service required, Supports multiple folders and remote devices, Sync within app sandbox or other app sandboxes (paid), Uses open-source Syncthing engine

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited file sync | $4.99 | one-time |

**What reviewers like**

- ✅ Effective Syncthing implementation for iOS
- 💰 Fair one-time purchase model (no subscription)
- 🔒 Privacy-focused peer-to-peer syncing
- 📱 Good Files app integration
- ⚡ Fast file synchronization when working

**What reviewers complain about**

- 🐛 Outdated internal Syncthing version (1.28 vs 2.x)
- 💸 Aggressive paywall at 20MB free limit
- 🔌 No true background sync (iOS limitation)
- 🚫 Cannot sync iOS Photos app natively
- ⚠️ Inconsistent purchase restoration across devices

**Reported bugs**

- Syncthing version incompatibility with v2.x devices
- Device discovery limited to 1 of 5 paired devices
- Insufficient space errors despite available storage
- Purchase dialog rendering issues on older devices
- Purchase not persisting after app reinstall

**Requested features**

- Update internal Syncthing to version 2.x or higher
- iOS Photos app sync capability (at least one-way upload)
- True background synchronization
- Selective folder sync to save storage space
- File Provider extension for deeper iOS integration


### Bibliocapsa

[App page](https://appshunter.io/ios/app/bibliocapsa/id6782098615)

Organize your physical and digital book collection with this private library app. Easily catalog books by scanning covers or barcodes, track reading progress, and manage your collection with custom shelves and stats. Enjoy a clean interface with customizable themes and icons.

**Highlights:** Catalog books via barcode scan or cover snap, Track physical and digital copies, Organize with custom shelves, Search entire library, View reading statistics, Optional server connection for advanced users

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

**In-app purchases:** none


## Frequently asked questions

### Is Möbius Sync free?

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

### Is Bibliocapsa free?

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

### Which has better reviews, Möbius Sync or Bibliocapsa?

Bibliocapsa is rated higher. Möbius Sync averages 3.8 out of 5 from 140 ratings, while Bibliocapsa averages 5.0 from 1 ratings.

### Do Möbius Sync or Bibliocapsa have ads?

Neither Möbius Sync nor Bibliocapsa shows ads.

### Which is updated more often, Möbius Sync or Bibliocapsa?

Möbius Sync ships an update every 2 months, and Bibliocapsa fortnightly. Most recently, Möbius Sync was updated on October 3, 2026 and Bibliocapsa 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.*