This is a great upgrade from my previous fitbit. The screen is bigger and the time is a permanent fixture even when you are checking your steps etc. The battery life i great, I charge it less than weekly granted it'[s new. App is the same as the old one. It doesn't register the type of exercise very well ie running walking and aerobic even though it says the heart rate is high it recognises walking. I love the reminders every hour to get moving. Not perfect but perfect for me.