Möbius Sync vs Resumable Recorder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Möbius Sync
Synchronize files between your iOS devices and other Syncthing-supported platforms without relying on cloud services. Access files within the app's sandbox or, with a paid upgrade, integrate with other apps' sandboxes and the iOS Photo Library.
- Peer-to-peer file synchronization
- Syncs with Syncthing-supported devices
- Access files via iOS Files app
- Paid access to other app sandboxes
- Paid export of iOS Photo Library
- Supports multiple folders and devices
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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).
Resumable Recorder
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Resumable Recorder is a private voice recorder for ideas, meetings and lectures that don't fit into one take. STOP NOW, RESUME LATER Stop a recording and come back to it whenever you're ready. Each time you resume, Resumable adds a new part to the same memo. Playback runs through the whole memo, with no separate files to stitch together. BUILT NOT TO LOSE AUDIO Resumable saves your recording as it goes. If the app is interrupted or closed unexpectedly, it recovers the audio recorded up to that moment the next time you open it. CONTROL IT FROM THE LOCK SCREEN A Live Activity shows your recording on the Lock Screen and in the Dynamic Island. Pause, stop or drop a bookmark without unlocking. Your bookmark count updates as you tap. To resume, tap Resume and the app opens and continues the same memo. BOOKMARKS AND NOTES Mark important moments while recording or listening, add a short note, and jump straight back to them later. Bookmarks appear on the memo's waveform. ON-DEVICE TRANSCRIPTS Turn any memo into text right on your iPhone. Tap a word in the transcript to jump to that moment in the audio. Your audio is never uploaded for transcription. ORGANIZE AND FIND Sort memos into folders. Search across memo titles, transcripts, bookmark notes and folder names. LISTEN YOUR WAY See each memo's waveform, skip back or ahead 15 seconds, and play at 1×, 1.5× or 2× speed. SHARE WHAT YOU NEED Share a memo as an audio file, or share its transcript as text or as a .txt file. PRIVATE BY DESIGN No account. No analytics. No ads. No tracking. Your recordings, transcripts and notes stay on your iPhone. Deleted memos go to Recently Deleted for 30 days, so you can restore them if you change your mind. Requires iPhone with iOS 17 or later. Transcription uses Apple's on-device speech recognition; on iOS 26, your iPhone may download Apple's speech model the first time you transcribe.
Screenshots
Verdict
The clearest difference is price: Möbius Sync at Free against Resumable Recorder's $3.99. Möbius Sync also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). Resumable Recorder's advantage is in-app purchases (none vs 1). On ads 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
Möbius Sync is free to download; Resumable Recorder costs $3.99 up front. Möbius Sync sells 1 one-off in-app purchase. Resumable Recorder asks for nothing beyond the download.
| Parameter | Möbius Sync | Resumable Recorder |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 3.8 (142 ratings) — better | — |
| Positive reviews | 54.3% of reviews | — |
| Number of ratings | 142 — better | — |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 35 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Pickup Infinity Limited | MicroComp LLC |
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
Resumable Recorder
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Möbius Sync
- Unlimited file sync$4.99
Resumable Recorder
No in-app purchases









