Is Polar belt what you currently suggest using with eCoach or some other? I am planning to buy one for eCoach use.
However, to make eCoach a real substitute for a real sports GPS, it still needs work. Some easy-to-implement features I believe.
DISPLAY MODE OPTIONS: PACE/SPEED; If this is already in eCoach, I apologise. I have noticed that in the activity log you can view the pace (min/km), but I am not sure whether it is visible during activity, as I currently only using eCoach as a backup/mapper, as stated earlier.
AUTOPAUSE; when speed drops below predefined or user defined speed or pace (perhaps some predefined values depending on exercise type and possibility for user to input a custom value): pause the exercise and record this part of the exercise as rest time, both time and distance; For example, "Autopause when speed drops below 5km/h" to pause exercise when I am standing in the traffic lights or when I am tying my shoelaces.
SPEED/PACE ALERTS; possibility to set low speed/pace alert and high speed/pace alert independently
AUTO-LAPS; At user defined (custom, or chosen from a list) intervals (either time or distance), log a lap, with distance and time and accumulated time.
TIME/DISTANCE ALERTS, should both be independently toggleable on/off and the limits should again be user defined (custom or chosen from a list).
SPEED AVERAGING: In some conditions GPS receiving is poor, and speed display might become "jumpy", showing very low or very high speeds.
VIRTUAL OPPONENT; Set your virtual opponents' average speed, and during your exercise, see how much you are behind or ahead of the opponent. Either timewise or distancewise.
LOW/HIGH HR ALERTS; Same idea as speed/pace alerts above, basically to define the HR-range in which you want to train and alert if going outside of that
All alerts need to be audible even if using media players on the n900 at the same time.