# Möbius Sync vs Synctrain

The clearest difference is rating: Synctrain at 4.9 against Möbius Sync's 3.8. Synctrain also leads on review sentiment (91% vs 55%) and in-app purchases (none vs 1). Möbius Sync's advantage is iOS requirement (14.1 vs 17.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

Synctrain holds the better App Store score, 4.9 against 3.8. Both are backed by a comparable volume of ratings — 140 and 123 respectively. Written reviews point the same way: 55% of Möbius Sync's written reviews are positive against 91% of Synctrain's.

Möbius Sync ships an update every 2 months, Synctrain every 6 weeks. The most recent releases landed on September 20, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Möbius Sync | Synctrain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (140 ratings)](https://appshunter.io/ios/app/mobius-sync/id1539203216/reviews) | **[4.9 (123 ratings)](https://appshunter.io/ios/app/synctrain/id6553985316/reviews)** |
| Number of ratings | **140** | 123 |
| Positive reviews | 55.0% of reviews | **91.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 23 MB | 33 MB |
| Requires iOS | **14.1** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Pickup Infinity Limited](https://appshunter.io/developer/1118833408) | [T-Shaped](https://appshunter.io/developer/1758051723) |

## 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


### Synctrain

[App page](https://appshunter.io/ios/app/synctrain/id6553985316)

Securely synchronize files and folders between your devices. Stream audio and video directly from other devices.  Manage file sharing permissions to control access to your data.

**Highlights:** Secure file synchronization, Full folder synchronization, Specific file selection, Audio and video streaming, Cross-device file mirroring, Customizable sharing permissions

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Intuitive interface
- 🚀 Seamless sync between devices
- 🔓 Open-source and free
- 💡 Integrates with iOS Files app

**What reviewers complain about**

- 🐛 Occasional connection issues
- 🔍 Could use more Apple-like design

**Reported bugs**

- Occasional app crashes
- Sync delays on some devices

**Requested features**

- Direct photo/video sync to remote devices
- Faster initial connection to server


## Frequently asked questions

### Is Möbius Sync free?

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

### Is Synctrain free?

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

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

Synctrain is rated higher. Möbius Sync averages 3.8 out of 5 from 140 ratings, while Synctrain averages 4.9 from 123 ratings.

### Do Möbius Sync or Synctrain have ads?

Neither Möbius Sync nor Synctrain shows ads.

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

Möbius Sync ships an update every 2 months, and Synctrain every 6 weeks. Most recently, Möbius Sync was updated on September 20, 2026 and Synctrain on September 24, 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.*