Möbius Sync vs NOTE TO TONE
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 storage. Manage multiple folders and remote devices, with options for sandbox or experimental cross-app sandbox syncing.
- File synchronization between iOS and other Syncthing devices
- No cloud service required
- Supports multiple folders and remote devices
- Sync within app sandbox or other app sandboxes (paid)
- Uses open-source Syncthing engine
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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 either: 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. 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).
NOTE TO TONE
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When an idea will not come. When you have been thinking about one thing for too long. Something entirely unrelated — a stranger's conversation overheard — can be what unlocks it. NOTE TO TONE generates words with no connection to anything, to work the stiffness out of an over-focused mind. ■ Random words, to loosen your head What appears is a short phrase that does not quite make sense. "a dry hourglass" — "unravel the heron" — "desperate for the layover" Look at it, and force yourself to find a meaning in it. The moment you try, your head starts looking down a different road. That is the whole point. ■ Words, music, and keeping them The words are random, yet now and then one arrives that somehow shows you a scene — one you want to keep. So you can stock them. And from that word, a piece of music of its own is made, and kept alongside it. The same phrase always makes the same music. ■ The music is built on the spot, by a synthesiser Each phrase is measured along six axes — light, motion, weight, grit, space and warmth — and the music is built to match. Nothing is a recording being picked from a shelf. The sound is made by the engine from our music app ARPJAM Studio, a serious synthesiser that plays itself. That engine is built into NOTE TO TONE in full, so you can hear the music without owning ARPJAM Studio. ■ How to use it - Open the app and a phrase appears - Press SOUND and music is generated for that phrase - Press KEEP to save the phrase and its music; look back from Stocks - Once unlocked, a download button appears. It saves an ARPJAM settings file (a JAM file) to edit in ARPJAM Studio, or to add to a playlist in ARPJAM Player ■ Unlock Free use gives you three phrases and their music each time you open the app. A single purchase unlocks unlimited phrases and JAM file downloads. Nothing recurring. ■ Good for - A brief that will not start - Circling the same thought - Resetting your head before a meeting - Finding a way into a piece of music - Looking at something meaningless before sleep May a good idea find you. --- Credits: PIANO: Salamander Grand Piano V3 — Alexander Holm (CC BY 3.0)
Screenshots
Verdict
The clearest difference is update cadence: NOTE TO TONE at every 2 days against Möbius Sync's every 2 months. Möbius Sync's advantage is iOS requirement (14.1 vs 16.0). On price, ads, in-app purchases and device support 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 NOTE TO TONE sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Möbius Sync ships an update every 2 months, NOTE TO TONE every 2 days. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.
| Parameter | Möbius Sync | NOTE TO TONE |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (140 ratings) — better | — |
| Positive reviews | 55.0% of reviews | — |
| Number of ratings | 140 — better | — |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 23 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Pickup Infinity Limited | Takashi Tsunoda |
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
NOTE TO TONE
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Möbius Sync
- Unlimited file sync$4.99
NOTE TO TONE
- Unlock$0.99









