Now supports Untrusted (Encrypted) Devices

Möbius Sync brings Syncthing to your iPhone or iPad, allowing you to synchronise selected files between iOS devices and other devices supported by Syncthing, without the need for any cloud service.

Supports multiple folders and multiple remote devices. Files can be added to and retrieved from shared folders via the Files app.

Uses the open-source Syncthing engine internally.

Usage is free up to 20MB. Unlimited file sync is available for a one-time purchase.

What’s New

Version 1.18.4

Upgraded to Syncthing v1.18.4 core. This includes support for untrusted (encrypted) devices, and as for all Syncthing users: this feature should still be considered beta / testing only.

Also fixed a few bugs. For full details see

Ratings and Reviews

4.4 out of 5
37 Ratings

37 Ratings

Stee-rider ,

Missing a key feature for mobile

This is a pretty solid GUI for Syncthing. I’m still experimenting, but there is one key feature that appears to be missing — *especially* important for mobile devices.

I need the ability to selectively sync. I want to see a listing of everything that’s in a given shared directory, but don’t actually download it to my phone unless I say so.

This is available in Resilio Sync, which is the main app I’m considering other than Syncthing. In Resilio I have a synced folder on my home computer that has almost a Terabyte of stuff. On my phone I can browse all of it, and if I want a particular file I tap to download that file to my phone.

Unless I’m missing a setting somewhere, Mobius and Syncthing doesn’t have anything like this. I either download it to my phone or it’s not linked at all. No in between.

alind84 ,

Overall pretty good - Any chance for an update?

So far has been a decent port of Syncthing. Update schedule is a bit slower if you’re waiting for the latest updates.

Personally I depend on the “Untrusted Client” feature available in the latest version of Syncthing so I can’t use this fully yet. Any chance of an update soon?


Developer Response ,

A build with the latest Syncthing core 1.18.4 including untrusted devices) is now available.

fellowFromMilwaukee ,

Excellent Having Syncthing here

I’ve been hoping for this for awhile and it’s great to see it finally arrive! I look forward to the e2ee later once it becomes more stable. Really appreciate the reasonable price and lack of analytics/trackers.

Background sync isn’t the best. Maybe they could use location to trigger sync as well like Nextcloud does for photo/video background syncing.

Developer Response ,

Thanks for the feedback. We’ll hopefully release E2EE shortly for “testing”. Location based triggering is one of the ideas for improving background sync, but we’re a bit wary of the perceived privacy concerns around the app requesting location access.

App Privacy

The developer, Pickup Infinity Limited, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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