Add mention of Synctrain and Möbius Sync (third-party iOS apps) on Downloads page

[bauchdj]

On the Downloads page, there’s a note under Android pointing users to third-party apps (Syncthing-Fork and Syncthing-Lite), clarifying that they are not official Syncthing releases.

At the moment, there is no equivalent mention for iOS or macOS apps, even though there are active third-party options in the community:

• Synctrain (iOS + macOS) – native client built with SwiftUI, supports selective sync, background syncing, and streaming.
• Möbius Sync (iOS) – sandboxed sync via the iOS Files app.

Since many new users check the Downloads page first, it might be helpful to add a “third-party apps” note for iOS/macOS, modeled after the Android section, e.g.:

### iOS

For iOS, please see the third-party apps [Synctrain](https://apps.apple.com/us/app/synctrain/id6553985316) and [Möbius Sync](https://apps.apple.com/us/app/m%C3%B6bius-sync/id1539203216). Note that they are not official Syncthing releases.

I'll open a PR and edit the downloads.md if you approve.

https://github.com/syncthing/website/blob/main/content%2Fdownloads.md

[calmh]

We should link to Synctrain assuming @pixelspark feels it's ready for it. I see no need to boost Möbius.

[bauchdj]

We should link to Synctrain assuming @pixelspark feels it's ready for it. I see no need to boost Möbius.

Sounds good. I'll wait for @pixelspark to comment. I understand. I'd only include Möbius because they contributed something where there was nothing.

[pixelspark]

Linking to Synctrain is fine with me, I think it is fairly stable, and is now entering a period of more gradual and stable improvement after the v2 upgrade (well until @calmh decides to shake up the internals once again and I have to accomodate :-))

The only slight hesitation for me would be the possible increase in support requests (I currently direct these to the discussions page on GitHub and am by no means planning to answer all these questions myself, but luckily the community is picking up some of that already).

As for mentioning Mobius, I am mostly neutral about this. I am not fully aware of your history with them. Their app seems to address needs some users have and are still not fulfilled by Synctrain (i.e. full access to all Syncthing features). Also their initial efforts were helpful for me in getting Synctrain up and running (and those bits were made available in their fork of Syncthing). I agree however the project should not promote commercial apps.

As a final remark: Synctrain is also available for macOS. I think syncthing-macos deserves a mention as well, that's basically Mobius for macOS but open source (actually they asked me yesterday if they could integrate Synctrain's onboarding screen so maybe they will have nicer native UI in the future too :-))

[tomasz1986]

I think syncthing-macos deserves a mention as well

This one is listed at the very top of https://syncthing.net/downloads together with two Windows-only solutions. I guess the question remains what should be recommended on the main Downloads page (and also where – at the top vs at the bottom 😅), and what should go to https://docs.syncthing.net/users/contrib only.

syncthing-macos is developed under the Syncthing project itself, making it the official release for macOS, which makes it obvious why it should be recommended on the main page, however the two Windows recommendations are third party. One of them (SyncTrayzor) has always been there though, and the other one (Windows Setup) was put there in place of SyncTrayzor, which had been abandoned. Now, SyncTrayzor is back in its v2 form, but removing Windows Setup for this reason doesn't seem fair…

[bauchdj]

## iOS

For iOS, please see the third party apps <a target="_blank" href="https://apps.apple.com/us/app/synctrain/id6553985316">Synctrain</a>. Note that it is not an official Syncthing release.

^^^ Add this to the bottom downloads.md after Android section

For context, I am new to Syncthing. It took a few mins to discover Synctrain because the #1 Google result for Syncthing iOS is still Möbius or an old forum mentioning Möbius. I'm sure a lot of people like me would appreciate having Synctrain listed as the unofficial open-source solution. The same way it is listed for Android.