Qsirch vs Möbius Sync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Qsirch
This app enables rapid file discovery on your QNAP NAS. Perform full-text searches across multiple devices and utilize extensive filtering options to pinpoint specific files. Easily share your findings through various communication channels.
- Search multiple NAS devices
- Full-text search for 6000+ file formats
- 30+ filter conditions
- File preview modes
- Create shareable download links
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Qsirch helps you quickly find the files you need. You can perform full-text search to locate files on the QNAP NAS and then further browse and share the files. Free yet powerful, Qsirch is your best search tool. Requirements: - iOS 16 or later versions - QNAP NAS running QTS 4.2 or later versions Major features: - Search for the files on one or multiple NAS devices - Support full-text search for over 6000 file formats - Provide more than 30 kinds of filter conditions, such as date modified, file path, and file metadata - Switch between two file preview modes - Create download links for shared files or folders, allowing you to share files via email, text messages, or instant messengers.
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).
Screenshots
Verdict
The clearest difference is rating: Möbius Sync at 3.8 against Qsirch's 1.8. Möbius Sync also leads on review sentiment (55% vs 15%) and ratings volume (140 vs 6). Qsirch's advantage is in-app purchases (none vs 1). On price, ads 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. Qsirch asks for nothing beyond the download.
Möbius Sync holds the better App Store score, 3.8 against 1.8. That said, the two scores are not equally well evidenced: Möbius Sync has 140 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 15% of Qsirch's written reviews are positive against 55% of Möbius Sync's.
Qsirch ships an update every 5 months, Möbius Sync every 2 months. The most recent releases landed on June 9, 2026 and September 20, 2026 respectively.
| Parameter | Qsirch | Möbius Sync |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (6 ratings) | 3.8 (140 ratings) — better |
| Positive reviews | 15.4% of reviews | 55.0% of reviews — better |
| Number of ratings | 6 | 140 — better |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 14.1 — better |
| Further details — not scored | ||
| Size | 56 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | QNAP Systems, Inc. | Pickup Infinity Limited |
Customer experience
Qsirch
Möbius Sync
Bugs and requests
Qsirch
Not enough reviews yet to summarise bugs or 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
In-app purchases
Qsirch
No in-app purchases
Möbius Sync
- Unlimited file sync$4.99
