It would be an improvement to have two warning beeps (e.g. 1 minute and next 10 seconds before the start)
Almost perfect. Would welcome to have an option to set up own start time independent of the phone time.
Nice It would be nicer if there were more start intervals available (ie. 15, 30, 45, 60, 90, 120 seconds) and even a 10 second warning beep.
v4.2.1 New layout for Time zero. User interface supports Android Material Design.
v4.2: Time zero: Timing relative to a zero time point.
v4.1: Starting window: Start Clock shows green 5 sec before and 5 sec after the start signal (configurable).
v4.0: GPS time synchronisation.