Möbius Sync vs Mindful Tennis
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).
Mindful Tennis
Log tennis sessions, rate key aspects of your game, and track performance trends. Get insights into your strengths and weaknesses to improve your play with intention. Syncs data across devices and works offline.
- Session tracking with background timer
- Rate 8 key aspects of your game
- Optional partner ratings
- Notes and focus points for sessions
- Performance trend visualization
- Win/loss record tracking
- Cloud sync and offline support
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Mindful Tennis is your personal tennis journal and performance tracker — designed for players of all levels who want to improve their game with intention. Whether you're a casual player, a competitive club member, or working with a coach, Mindful Tennis helps you log every session, reflect on your performance, and spot trends that matter. KEY FEATURES Session Tracking Start a session before you play and end it when you're done. A background timer keeps track of your session duration while you focus on the court. An ongoing notification lets you quickly return to end your session. Rate 8 Key Aspects After each session, rate yourself (1–5 stars) across eight core areas of your game: • Forehand • Backhand • Serve • Return • Volley • Slice • Movement • Mindset Optionally invite a partner to rate you too, so you get an outside perspective on your play. Notes & Focus Points Set a focus for each session — what do you want to work on today? Add notes after playing to capture insights, breakthroughs, or things to improve next time. Performance Trends Visualize your overall performance score over time with interactive charts. Filter by time range (1 week, 1 month, 3 months, 6 months, 1 year, or custom) to see short-term and long-term improvement. Drill down into each of the 8 aspects to see how individual parts of your game are evolving. Win/Loss Records Log set scores for each session and track your win/loss record. Filter by opponent and time period to see how you match up against specific players. Session History Browse your full session history in a color-coded list: • Green — Great session (score >= 70) • Amber — Average session (score 40-69) • Red — Needs work (score below 40) Tap any session to review the full detail — ratings, scores, notes, and more. Cloud Sync Your data is always backed up and synced across devices. Sign in and pick up right where you left off, on any of your devices. Works offline too — sessions are saved locally first and synced automatically when you're back online. WHO IS IT FOR? • Recreational players who want a simple way to track what they worked on • Club competitors tracking set scores and opponent records • Coached players keeping detailed session notes for review • Anyone who believes reflection leads to improvement https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Mindful Tennis at 5.0 against Möbius Sync's 3.8. Mindful Tennis also leads on update cadence (every 3 weeks vs every 3 months). Möbius Sync's advantage is ratings volume (141 vs 1) and device support (3 vs 1). On price, ads, in-app purchases and monetization model 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 Mindful Tennis sells 5 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Mindful Tennis holds the better App Store score, 5.0 against 3.8. 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, Mindful Tennis every 3 weeks. The most recent releases landed on October 30, 2026 and October 9, 2026 respectively.
| Parameter | Möbius Sync | Mindful Tennis |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (141 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 54.3% of reviews | — |
| Number of ratings | 141 — better | 1 |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 28 MB | 96 MB |
| Age rating | 4+ | 4+ |
| Developer | Pickup Infinity Limited | Arunabh Priyadarshi |
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
Mindful Tennis
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Möbius Sync
- Unlimited file sync$4.99
Mindful Tennis
- Monthly Premium$0.991 Month
- Weekly Premium$0.997 Days
- Quarterly Premium$2.993 Months
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- Annual Premium$9.991 Year
- Lifetime premium$29.99









