Hands down best app for run training. Better than any sport watch! (I use with iPhone, NOT Apple Watch) Audio means no eyeglasses required too.
Heres the great:
With earbud or Bluetooth headphone youve got total control of verbal posting of current pace, distance, average pace, laps, intervals, splits... exactly what ( and only what) you select pre-run. What you want announced will happen by your choice of, say, on demand, or by 1/4 miles, by 5 minutes, by laps.... ANYTHING you choose! Set up several settings named for each type of run you do ( ex.: interval(s), long slow, tempo, race against your previous best, etc) and then just select that activity and go enjoy. Can even set announcements for you to speed up or slow to stay in a specific pace or heart range if you want. Pretty frigin fabulous if you have a 3 button controller on your headphones. iPhone goes in my pocket and I dont touch it again until Im ready to shower. Like a coach whispering in my ear upon request! Super data collection in app and, if desired, posted to calendar, fitness program, or social media. History saved. Every graph I could ever want. Get this app and throw out your Garmin/Ironman watch.