SIGMA LINK vs XOSS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SIGMA LINK
Easily transfer training data from compatible devices to your smartphone. View personal bests, statistics, and completed tracks. Sync all your training data, workouts, and sport profiles with cloud integration for constant access.
- Transfer training units
- View training statistics
- Track personal bests
- Manage device settings
- Sync with SIGMA CLOUD
- Access workouts and sport profiles
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The SIGMA LINK App is your supplement to the DATA CENTER and the fastest and easiest way to access your training data. With SIGMA LINK, you can transfer all your training units from a compatible SIGMA product to your smartphone. In addition to this, device settings can be made directly in the app. Besides the individual trainings, the app also shows you personal best performances, training statistics as well as completed tracks. With the SIGMA CLOUD integration, you can sync all your training data, workouts, sport profiles and tracks now with the new LINK App. So your data is available on your iPhone all the time. Enjoy the new SIGMA LINK App! NOTE: Apple doesn't support NFC. If you want to show your data from another bike computer, please use our SIGMA CLOUD to sync your data.
XOSS
Record and analyze your outdoor sports activities with detailed metrics like speed, cadence, and heart rate. Plan routes, sync data from various bike computers, and share your progress with friends. Offers advanced data analysis with charts and GPS tracking.
- Syncs with bike computers
- Records workout data
- Advanced data analysis
- GPS tracking on map
- Route planning
- Syncs with Strava/TrainingPeaks
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XOSS is an "ALL IN ONE" application specialised in cycling and other outdoor activities. With XOSS you can do: - Data syncing from verified bike computers. Including: XOSS, CooSpo, CYCPLUS, etc.. - Workouts recording with all the data you need for free: Speed, Cadence, Power, Heart-rate, Elevation, Calories, Distance, Time, etc... - Advanced data analyzing with charts and graphics. GPS track on map, Elevation, Speed, Cadence, Heartrate Charts, Training zone analysis(Heart-rate, Power), and much more is coming! - Sync with other apps like STRAVA, TRAININGPEAKS. - Share with your friends by connecting to Strava and Training Peaks or share your workouts to social media. - Route planning before your journey. - XOSS uses Health Kit to export your activities into the Health app and to read heart rate. Follow us on FB and IG: xoss.co. More information is available at https://www.xoss.co
Screenshots
Verdict
The clearest difference is review sentiment: XOSS at 52% against SIGMA LINK's 9%. XOSS also leads on rating (4.4 vs 1.5) and ratings volume (395 vs 8). SIGMA LINK's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 18). 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. Neither carries in-app purchases, so what you see is what you pay.
XOSS holds the better App Store score, 4.4 against 1.5. That said, the two scores are not equally well evidenced: XOSS has 395 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 9% of SIGMA LINK's written reviews are positive against 52% of XOSS's.
SIGMA LINK ships an update every 4 months, XOSS every 6 weeks. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.
| Parameter | SIGMA LINK | XOSS |
|---|---|---|
| Price | Free | Free |
| Rating | 1.5 (8 ratings) | 4.4 (395 ratings) — better |
| Positive reviews | 9.0% of reviews | 52.2% of reviews — better |
| Number of ratings | 8 | 395 — better |
| Update frequency | Every 4 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 18 |
| Further details — not scored | ||
| Size | 76 MB | 110 MB |
| Age rating | 4+ | 4+ |
| Developer | SIGMA-ELEKTRO GmbH | XOSS HONG KONG CO., LIMITED |
Customer experience
SIGMA LINK
XOSS
Bugs and requests
SIGMA LINK
Not enough reviews yet to summarise bugs or requests.
XOSS
Reported bugs
4 issues- App crashes after recent updates
- Unable to update device firmware on iOS
- Sensor connectivity problems
- Incorrect distance/speed measurements
Requested features
4 requests- Add more detailed metrics (e.g. elevation, power)
- Improve route editing and privacy controls
- Introduce automatic sync options
- Provide more comprehensive data export capabilities
In-app purchases
SIGMA LINK
No in-app purchases
XOSS
No in-app purchases
