Do I have to run with my phone when I use the ALPHA 2?

ALPHA 2 has offline storage, which means you can run without your smartphone and sync your workout data to the Mio GO app later. If you'd like to use your smartphone GPS for more accurate speed and distance data, you can bring your phone with you and connect the ALPHA heart rate to Mio GO, or a third-party app such as Strava, Wahoo Fitness, MapMyRun, RunKeeper, etc.