question about glow app

Tracey • Ttc since September 2013, hoping for another miracle baby!

Does anyone know if it auto calculates your cycle, or does it go off of the information you input? I have 3 different apps and all 3 are showing different dates that flow will start. I've input my cycles back to January.

It would also be awesome if you could click on the notification and it take you to the post that someone has replied to.