1. Home
  2. 📊 Productivity
  3. Möbius Sync
Möbius Sync

Möbius Sync

File sync with Syncthing

140 ratings
171 reviews
🔧 Utilities
📊 Productivity
Free
In-App Purchases

Details

  • Released
  • Updated
  • November 22, 2020
  • January 27, 2025

Features

Developer

Pickup Infinity Limited
✨Promote your app ✨
Möbius Sync screenshot #1 for iPhone
iphone
ipad
🧾$4.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐171
Reviews↘︎
📝8+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦w/o updates
Updates frequency↘︎
🖼️Get Icon
Icons↘︎

About

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.

✓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
Show original description

What users say

Summarized from real user reviews of Möbius Sync. Based on 140 reviews and a 3.8/5 average, it highlights the 8 positives and 14 negatives reviewers mention most about this Productivity app.

Positive things

  • ✅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
  • 🎯Works well with Obsidian and Logseq
  • 🛠️Stable once properly configured
  • 📂Supports syncing large file collections

Negative things

  • 🐛Outdated internal Syncthing version (1.28 vs 2.x)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
  • 🔧Complex setup and configuration required
  • 📵App stops syncing when closed or locked
  • ❌Limited selective sync capabilities
  • 🐛Frequent 'insufficient space' errors despite available storage
  • 📞Poor developer communication and support
  • ⏱️Infrequent app updates
  • 🎨Unintuitive UI (uses web interface)
  • 🚫No family sharing for in-app purchases
  • 🐛Purchase button non-functional on some devices
See all reviews

What's New in Möbius Sync

1.28.0

January 27, 2025

Incorporates Syncthing 1.28.0 (https://github.com/MobiusSync/MobiusSync/issues/210) Enhancement: Support family sharing (https://github.com/MobiusSync/MobiusSync/issues/208) Enhancement: Photo Collection option: export as read-only (https://github.com/MobiusSync/MobiusSync/issues/182) Bug fix: External folder stops syncing after restore onto new device (https://github.com/MobiusSync/MobiusSync/issues/201) Bug fix: Background crash reported via TestFlight (https://github.com/MobiusSync/MobiusSync/issues/211) Bug fix: External Bookmarks Persist Even When Folders Are Removed (https://github.com/MobiusSync/MobiusSync/issues/188) Bug fix: Vision Pro - camera used for QR Code scanning (https://github.com/MobiusSync/MobiusSync/issues/214)

More
1

In-App Purchases

$4.99

Unlimited file sync

Sync unlimited files with unlimited devices

User reviews

Most RecentHighest RatedLowest Rated

Abandoned

This app is more trouble than its worth. Just please give me a widget that I can press to force a sync without needing to open the app every time.
MSTFSNTMSTFSNT

20mb limit?!!

Useless
rumacuserrumacuser

2nd node couldn’t pick external folder

I installed this for obsidian. I need to pick its folder as external folder from this app. But purchase and restore purchase dialog of this app didn’t function with unknown errors. Is only one device available?
y07123y07123

Not updated since 2024

Mobius is currently on SyncThing v1.28.0 which was released on Oct 2024, leaving several security vulnerabilities open (search for CVEs for this version).

The current version of SyncThing is v2.0.16 as of May 2026 - please update!!!
🍆💦💦💦💦💦💦💦💦💦💦💦💦💦🍆💦💦💦💦💦💦💦💦💦💦💦💦💦

🤩

Ich bin Mega dankbar und happy über die App! Ihr seid die Besten!

Das ist so ein Krampf gewesen bisher, Dateien hin und her zu schieben zwischen Apple und Nicht-Apple-Sytemen, wenn man keine Cloud nutzen will.

Und jetzt synchronisiert sich das! Mit Syncthing! Und auch noch automatisch im Hintergrund! Der Hammer!! Ihr habt bestimmt n hohes Appletier dafür erpresst oder bestochen, damit das möglich wurde 🥸
Show more
- Karmuffel -- Karmuffel -
See 166 more reviews

Developer apps

TWiTfinity
TWiTfinity

Unofficial twit.tv app

🔍 Reference

(7)

Free
Heckle Live Streaming
Heckle Live Streaming

Heckle here... (nicely)

🌐 Social Networking

(86)

Free
In-App PurchasesWith Ads
Möbius Sync Pro
Möbius Sync Pro

File sync with Syncthing

📊 Productivity

(27)

$4.99
See developer apps

User experience

🐞

Reported Bugs

16 issues

Syncthing version incompatibility with v2.x devices

Bug

Device discovery limited to 1 of 5 paired devices

Bug

Insufficient space errors despite available storage

Bug

Purchase dialog rendering issues on older devices

Bug

Purchase not persisting after app reinstall

Bug

Settings reset after app updates

Bug

External folder bookmark path cannot be changed

Bug

.stfolder sync failures and naming conflicts

Bug

Sync hangs at intermediate percentages

Bug

Files not appearing in designated folders despite sync confirmation

Bug

App crashes and becomes unresponsive

Bug

Language preference not saved between sessions

Bug

Syncthing disabled errors with no explanation

Bug

Quick Sync feature not working reliably

Bug

Accessibility issues with VoiceOver

Bug

App storage consuming excessive disk space (10GB+)

Bug
✨

Requested Features

15 requests

Update internal Syncthing to version 2.x or higher

Feature

iOS Photos app sync capability (at least one-way upload)

Feature

True background synchronization

Feature

Selective folder sync to save storage space

Feature

File Provider extension for deeper iOS integration

Feature

Widget for continuous background operation

Feature

Photo library backup functionality

Feature

Family sharing support for purchases

Feature

Better UI/UX with custom frontend instead of web interface

Feature

Automatic sync without manual app opening

Feature

Support for untrusted devices

Feature

Folder encryption support

Feature

Location-based sync triggers

Feature

More frequent Syncthing core updates

Feature

Better documentation and setup guides

Feature

FAQ

What does Möbius Sync do?

Möbius Sync allows you to synchronize selected files between your iPhone or iPad and other devices that support Syncthing. It operates without the need for any cloud service, facilitating direct peer-to-peer file transfers.

What are the key features of Möbius Sync?

Key features include synchronizing files between iOS devices and other Syncthing-supported platforms, supporting multiple folders and remote devices, and the ability to sync within the app's sandbox or, with a paid upgrade, access other apps' sandboxes.

How much does Möbius Sync cost?

Usage within the Möbius Sync sandbox is free for up to 20MB of file synchronization. Unlimited file sync, including syncing files in other apps' sandboxes, is available through a one-time purchase.

What devices is Möbius Sync compatible with?

Möbius Sync is designed for iPhone and iPad devices. It synchronizes with other devices supported by the Syncthing protocol, which includes a wide range of desktop and mobile operating systems.

What are common use cases for Möbius Sync?

Common use cases include keeping documents, photos, or project files consistent across your iPhone, iPad, and computer without relying on cloud storage. It's ideal for users who prioritize privacy and direct control over their data.