# Möbius Sync — user reviews > 171 indexed App Store user reviews of Möbius Sync by Pickup Infinity Limited, rated 3.80/5 from 140 ratings. - Source: https://appshunter.io/ios/app/mobius-sync/id1539203216/reviews - App overview in markdown: https://appshunter.io/ios/app/mobius-sync/id1539203216.md - Rating breakdown: 5★ 79 · 4★ 16 · 3★ 12 · 2★ 5 · 1★ 28 ## What do users think of Möbius Sync? Overall sentiment: mixed **Pros** - ✅ 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with Obsidian and Logseq - 🛠️ Stable once properly configured - 📂 Supports syncing large file collections **Cons** - 🐛 Outdated internal Syncthing version (1.28 vs 2.x) - 💸 Aggressive paywall at 20MB free limit - 🔌 No true background sync (iOS limitation) - 🚫 Cannot sync iOS Photos app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 **Commonly 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 - Settings reset after app updates - External folder bookmark path cannot be changed - .stfolder sync failures and naming conflicts - Sync hangs at intermediate percentages - Files not appearing in designated folders despite sync confirmation - App crashes and becomes unresponsive - Language preference not saved between sessions - Syncthing disabled errors with no explanation - Quick Sync feature not working reliably - Accessibility issues with VoiceOver - App storage consuming excessive disk space (10GB+) **Most 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 - Widget for continuous background operation - Photo library backup functionality - Family sharing support for purchases - Better UI/UX with custom frontend instead of web interface - Automatic sync without manual app opening - Support for untrusted devices - Folder encryption support - Location-based sync triggers - More frequent Syncthing core updates - Better documentation and setup guides ## Newest reviews (10 of 171) ### 3/5 — 2nd node couldn’t pick external folder *2026-05-10* 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? ### 3/5 — Open external folder doesn't work *2026-04-14, version 1.28.0* Title. Whenever I try to open a folder, and tap "external folder," it just doesn't work. No file explorer is brought up, no folder is created where I want it, etc. ### 3/5 — Projekt eingeschlafen?! *2025-11-04* Da die App seit Monaten nicht aktualisiert wird und Bugs nicht gefixt werden, habe ich eine bessere Alternative gesucht und in Synctrain gefunden. Synctrain erlaubt zudem, die Dateien und Ordner zu selektieren, die synchronisiert werden sollen. Das spart Speicherplatz auf den Mobilgeräten! ### 4/5 — Excellent tool *2025-10-03, version 1.28.0* Decent tool for those who know what they are doing. Share some profit with marvelous authors of Syncthing. ### 4/5 — Works as expected *2025-09-23, version 1.28.0* Great solution for private syncing between your devices albeit a bit cumbersome to configure due to the web interface / open source nature of the UI. ### 4/5 — Syncthing v.2.0.3 *2025-09-03* Работает ли с Syncthing v.2.0.3 ?? ### 2/5 — I really wanted to support this but… *2025-07-16, version 1.28.0* I tested mobius for syncing game save files and it works great. However, since I started using it there is an issue: even though the files I am trying to sync are <15MB, the app always disables syncing claiming that I am over limit with 28MB. Nowhere I see where this extra 13MB comes from, nowhere the purchase pop-up explains this. After restarting the app it always synced anyway, until today when this “workaround” stopped working completely. So it is either a bug, or I missed something or the developers are trying to monetize every single MB of syncthing so badly…I believe it is the former. I hope to get a patch soon or at least an explanation. One reviewer claims a similar issue with insufficient space so it could be related? ### 3/5 — Basics work, but buggy *2025-06-17* The options to sync other apps’ folders or photo collections does not work on iPad. You can still sync from other devices to the Moebius’ folder, if that is what you want from the app. But you cannot backup your photos, for example. ### 3/5 — Not upto date *2025-06-11* We paid for this software which is based on FOSS syncthing. The least we can expect is to keep syncthing upto date here. ### 2/5 — Forgets Purchase if you reinstall the app *2025-05-18, version 1.28.0* Worked great until I had to make space on my iPad for an update. When I reinstalled this app, it asked me to pay them again and wouldn’t ‘restore purchase.’ I’m not paying you twice, sorry. Shame, because it’s been nice to have syncthing with all my other devices. ## Most critical reviews (10 lowest-rated) ### 1/5 — Abandoned *2026-08-13* 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. ### 1/5 — 20mb limit?!! *2026-06-11* Useless ### 1/5 — Not updated since 2024 *2026-05-07* 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!!! ### 1/5 — not updated *2026-04-10, version 1.28.0* latest version with breaking chang ### 1/5 — Old Syncthing Version *2026-03-04* I’ll revise my 1-Star rating when the internal Syncthing version 1.28 is updated to a 2.# release. Right now my iPhone can only see 1 of the 5 devices it’s paired with, and it can’t even sync files with it. The problem is all those devices are running Syncthing v2 and as they’re updated to newer and newer versions my iPhone has more and more trouble connecting with them. I could downgrade all my other devices to 1.28 but just no. ### 1/5 — Приложение больше не обновляется *2026-01-19* Автор забросил приложение. Ишка с syncthing v1.29.2 на гитхабе висит ещё с 5 мая 2025. Уже давно syncthing v2 вышел. Жалею, что купил Pro-версию. **Developer response:** The way iOS reports free space to the app is very conservative, so you may need to decrease the Minimum Free Disk Space value under advanced folder settings. ### 1/5 — Оплата не проходит. Контактов поддержки нет *2025-11-01* Оплата не проходит. Контактов поддержки нет ### 1/5 — Horrible app *2025-09-24, version 1.28.0* Horrible app. Don't download PLEASE!! You will just waste your time like on any other file syncing app/website that only says "you can transfer your files" and doesn't say "only if you pay" ### 1/5 — Greedy forkers *2025-09-08, version 1.28.0* They fork and port a free App from another platforms, and then change the iPhone version to cost, unless using with a ridiculously small amount of data. Greediness seems to have no limits, using others’ code but then demand payments from users. ### 1/5 — Жулики *2025-07-11* Урезали бесплатный софт и просите деньги за полный функционал ## Most praised reviews (10 highest-rated) ### 5/5 — 🤩 *2026-05-06* 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 🥸 ### 5/5 — best app in this category supports from algeria *2026-02-19, version 1.28.0* than you ### 5/5 — Bringt Syncthing auf iOS und iPadOS *2026-02-12* Die App funktioniert prima, um meine Daten mit verschiedenen Macs und PCs auf meinem iPhone und meinem iPad synchron zu halten. Zu Beginn war es für mich ungewohnt, dass Möbius gestartet werden muss, damit die Synchronisierung anläuft. Mittlerweile habe ich mich daran gewöhnt und finde es sogar sinnvoll, damit gezielt die Synchronisierung anstoßen zu können. Es gibt von Syncthing neuere Versionen – hier wäre es schön, wenn der Entwickler die App ebenfalls auf dem aktuellen Stand halten könnte. Ich hoffe, der Entwickler pflegt die App weiter – sie ist echt ihr Geld wert. ### 5/5 — Worth it! *2026-01-12* One of the few apps I’ve happily paid for. Well worth the money to make sync thing work with iOS. I appreciate the pay once model rather than subscription. ### 5/5 — Great app! *2025-12-26* This app is totally worth the few bucks to get the full version. I synchronize tens of thousands of photos (+40gb) in specific photo albums between my phone and my Windows PC. It works and it works fast! You don’t find software that works this well for free so choke up the few bucks and get this app that works amazingly well. ### 5/5 — Problem *2025-09-03* Not working great with obsidian. ### 5/5 — Very useful app *2025-07-27, version 1.28.0* An irreplaceable app for syncing infrequently changes files to be available offline. Please keep it going! ### 5/5 — Works Great w Logseq *2025-07-03, version 1.28.0* I use to sync Logseq on iPhone with a Mac and a Linux machine because iCloud wasn’t an option and it works great (you need to upgrade to the paid version but well worth it). ### 5/5 — Does what it’s designed to do *2025-06-01, version 1.28.0* Thanks for this. I purchased to complete my iPhone, Mac, and Linux syncthing configuration, and to get all my stuff out of the cloud. Unique tool and worth supporting. ### 5/5 — Best way to get Syncthing on iOS *2025-04-21, version 1.28.0* A big thanks to the developer and works well with Obsidian --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*