An app I’ve had for a couple years that I find super useful and motivating is the Runkeeper app. In warmer weather I often use it to track my miles as I run so I only have to bring my iPhone along on my run. In winter months the phone battery won’t last, so I rely on my Garmin. Despite not using the app all winter to track my actual runs, I still use it to log my activities after each run. Tracking my weekly, monthly, and yearly miles is very motivating to me.
This winter my motivation has been all over the place so this has really helped me. Knowing I will get to enter my miles into Runkeeper after a run has motivated me to complete runs I might have other wise skipped. I also find myself wanting to run further than the month before or complete more activities than the month before. After entering each run it automatically calculates my progress towards the yearly goal I made for myself (to run 1500 miles). Seeing that percentage increase and the bar grow keeps me wanting to run my miles.
I also love the graphics and home screen. Looking over data from past years is encouraging, too. If you don’t have the app or don’t use it often consider using it to track your future runs and measure your progress!