Hi what is the maximum height that the Spark can actively track an object?

I can just tell you, that 150m over starting altitude it is not working "To high for active track"
My guess is that max 120m/400 feet will be the limit from the app.

Thanks for the inquiry, we will forward this to our R&D engineers for clarifications. Your patience is appreciated.

Depends on tha size of the object. I use 20-30m for tracking single person as a guide. Anything above 30m will have issues with recognising the person. May be someone will have a different experience.