Keep track of how many days until events in the future or how long it's been since an event in the past such as last time since you changed the air filters, got an oil change, got a haircut, etc. You can now also see the average of how long it's been in between instances of past occurrences. Keep track of how long it is until important events. Keep track of how long it's been since you last spoke to or visited a family member or friend.