Using your phone’s GPS, RunKeeper tracks runners’ time, distance, pace and calories burned. The app shows your running path on a virtual map and stores all your workout data, including from past sessions. Users also have access to a preloaded database of training and running routines and can design custom interval workouts, which they can follow via audio cues from the app that remind runners to pick up their pace. The app also lets runners listen to music while they work out, a strategy that’s been shown to increase running speed and endurance.
RunKeeper gets a vote approval from one of TIME’s own staffers, Liz Grover on our imaging desk, who is currently training for a half-marathon in the fall. Grover uses the app as part of her daily training program and says she syncs her stats to other online accounts so she can share her progress with Facebook and Twitter followers.
Available here for: iPhone and Android