Yes, the Fiit Tracker is compatible with different training apps, including: 

3,2,1, Run
Beats App
CadenceVR
CycleCoach

Cyclemeter
Elevation Tracker
Ergbuddy

Endomondo
Heartworks
iBioFeedback
iBody
Joggy Coach
Kinetic GPS
KinoMap
Komoot
LiveTraining

Map My Run

Map My Ride
Map My Tracks Pro
Monitor Your Weight
Motivo Cycling
MyFitnessPal

Polar Beat
Rouvy
Running
Runtastic
Strava Running and Cycling GPS

Swift
Training Peaks
Virtual Runner
Walkmeter GPS Pedometer
Wahoo Fitness
Zwift