I am running my first half marathon in May and am using this to help train. The workout schedule provides increasing duration over the time frame.
The few bugs about it are:
1. It doesnt keep track of my history, cant figure out why
2. The voice prompts start with the change in the workout - it would be better if it prompted prior to the change and then countdown 3-2-1 now.
3. There is no voice prompt at the completion of the workout letting you know you are finished.
Other than those bugs, its not a bad app to start your training.
JoulesCCRN about Half Marathon Trainer Pro - Run for American Heart