Apps like Garmin Catalyst™

Here are some great alternatives to Garmin Catalyst™ by Garmin :
LITPro - GPS Lap Timer
LITPro - GPS Lap Timer
★4.4
RaceChrono
RaceChrono
★4.4
Racing View
Racing View
★4.8
RaceChrono Pro
RaceChrono Pro
★4.6
Vracer GPS Track Day Lap Timer
Vracer GPS Track Day Lap Timer
★3.7
TrackAddict
TrackAddict
★4.6
Bike & Run Tracker - Cadence
Bike & Run Tracker - Cadence
★4.6
SmartRace for Carrera Digital
SmartRace for Carrera Digital
★4.7
Slot Car Trainer Lite
Slot Car Trainer Lite
★3.8
Slot Car Trainer Pro
Slot Car Trainer Pro
★4.4
DashCommand (OBD ELM App)
DashCommand (OBD ELM App)
★3.8
Mega Pack r.485
Mega Pack r.485
★3.2
GPS Logger
GPS Logger
★4.1
GPS Logger Pro
GPS Logger Pro
★4.6
Gear Tracker II
Gear Tracker II
★3.8
KomoGPX
KomoGPX
★4.3