I increase a counter when I called addSessionLap, and I reset it when the session start. Lap avg hr, has to be computed on your own too.
in a data field, you use onTimerLap(). addLap() is only available in device apps.
onTimerLap() isn't available on some of the older devices, and there's really nothing you can do.
Yes... maybe I have tried with an old device (a 920xt) but I have not performed tests with new devices. Thank you.