Möbius Sync vs OneSync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Möbius Sync
Sync files between your iOS devices and other Syncthing-compatible platforms without relying on cloud services. Access files within the app's sandbox or, with a paid upgrade, integrate with other apps' sandboxes and export photos.
- Peer-to-peer file synchronization
- Syncthing engine integration
- Sync with other Syncthing devices
- Access files via iOS Files app
- Paid access to other app sandboxes
- Paid export of iOS Photo Library
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Möbius Sync brings Syncthing to your iPhone or iPad, allowing you to synchronize 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. Synchronized folders can be created: 1. in the Möbius Sync sandbox and files can be added to and retrieved from shared folders via the iOS Files app; or 2. (PAID feature) by accessing other apps' sandboxes. This feature is EXPERIMENTAL and may break other app's functionality; or 3. (PAID featured) iOS Photo Library folders can be exported to other devices send-only. Uses the open-source Syncthing engine internally. Usage within the Möbius Sync sandbox is free up to 20MB. Unlimited file sync, including files in other apps' sanboxes is available for a one-time purchase. NOTE: The functionality unlocked by in-app purchase is identical to that in Möbius Sync Pro (which is purchased up-front).
OneSync
Instantly share files and text between all your devices without needing to sign up. Use QR codes for quick connections and enjoy secure, end-to-end encrypted transfers. Ideal for personal use or quick transfers to friends.
- Instant cross-platform file sharing
- QR code for quick session joining
- Secure end-to-end encryption
- No sign-up required
- Share text and files
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OneSync sends files and text between your phone, tablet and computer in seconds. No account, no cable, no pairing. HOW IT WORKS 1. Start a session on one device. You get a QR code and a short code. 2. On another device or any web browser (onesync-web.setlog.net), scan the QR code or enter the code. 3. Send files and text. Every device in the session receives them. HIGHLIGHTS • Works across your phone, tablet and computer (web) • No sign-up, no login • Share straight from other apps through the share sheet • Join with a QR code, a code or a link • Files and text are deleted from our server after the session ends • Up to 2 devices per session (10 with Pro) FREE AND PRO Free: files up to 200MB each, sessions up to 1 hour, up to 2 devices, supported by ads. Optionally watch an ad in a session to send files up to 1GB each in that session only. OneSync Pro: files up to 5GB each, sessions up to 24 hours, up to 10 devices, no ads. 7-day free trial for new subscribers. A subscription applies to the platform where you buy it. PRIVACY AND SECURITY Transfers use encrypted connections (HTTPS/TLS). OneSync is not end-to-end encrypted, so please do not share highly sensitive files. SUBSCRIPTION INFORMATION OneSync Pro is an auto-renewing subscription, monthly or yearly, with a 7-day free trial for new subscribers. Payment is charged to your Apple ID account at confirmation of purchase (after the trial ends). The subscription renews automatically unless you cancel at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage or cancel any time in Settings > your name > Subscriptions. Any unused part of a free trial is forfeited when you purchase a subscription. The price is shown in the app and the App Store before you subscribe. Terms of Use: https://onesync-web.setlog.net/terms Privacy Policy: https://onesync-web.setlog.net/privacy
Screenshots
Verdict
The clearest difference is rating: Möbius Sync at 3.8 against OneSync's 1.0. Möbius Sync also leads on ads (none vs shown) and ratings volume (141 vs 1). OneSync's advantage is update cadence (every 9 days vs every 3 months) and monetization model (free vs free with in-app purchases). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Möbius Sync sells 1 one-off in-app purchase and OneSync sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Möbius Sync holds the better App Store score, 3.8 against 1.0. That said, the two scores are not equally well evidenced: Möbius Sync has 141 ratings behind it against 1, so its average is the more settled of the two.
Möbius Sync ships an update every 3 months, OneSync every 9 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | Möbius Sync | OneSync |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (141 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 54.3% of reviews | — |
| Number of ratings | 141 — better | 1 |
| Update frequency | Every 3 months | Every 9 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 28 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Pickup Infinity Limited | JUKI JUNG |
Customer experience
Möbius Sync
OneSync
Bugs and requests
Möbius Sync
Reported bugs
16 issues- 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
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- 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+)
Requested features
15 requests- 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
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- 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
OneSync
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Möbius Sync
- Unlimited file sync$4.99
OneSync
- OneSync Pro Monthly7 Days trial$2.991 Month
- OneSync Pro Yearly7 Days trial$19.991 Year







