ColorTrax v1.76 released to the public on the Google Play Store, still free and no ads:

version 1.76:
– NEW: Remote Link Mode v2, race audio and data to nearby devices
– REVISED: fixed chart data spinners on OS 6+
– REVISED: Manual mode touch changes
– BETA: Scrapbook burst/multi-picture mode
– BETA: Color-Cluster detection (helps reject false detections)

Also, v1.80 released to beta, which includes new remote link dialog which allows selecting which racers to hear.

suggestions and feedback welcome!
thanks,
protocol