Nolio retrieves the raw data from your watch. Brand apps, on the other hand, apply their own processing before displaying a number. That's where most of the differences you may notice on the same workout come from.

Nolio offers a smoothing setting that softens the curves, useful when the raw data is too jagged. It's also what can create a difference with what your app displays.

Drag the slider to get comparable curves:

On watches without a barometer, Garmin, Suunto or Strava correct the elevation gain from the GPS track, using their own algorithms. Nolio, which starts from the raw data, may show a very different result.

You can run an altitude recalculation by clicking Elevation gain:

Suunto only sends us raw heart rate values. In the Suunto App, processing is applied to them that we don't have access to.

Nolio applies its own processing to get close to it, but the curves and average HR often remain different. We hope Suunto will one day send us the already processed data.

Garmin sends us resting HR values continuously throughout the night and day, but never the one it chooses to display in Garmin Connect.

Nolio keeps the lowest of the values received. That explains the difference with your app.