This app was mentioned in 4 comments, with an average of 4.75 upvotes
At last at na-approved na ang app ko sa iOS, ito rin yung link sa Google Play. Rundom ang tawag ko didto, the main goal is to let your friends cheer for you when you're exercising.
I just updated my Rundom app, available na ngayon sa Google Play. Under review pa sa App Store. The idea is that when you're exercising (for example, running or in a marathon), minsan boring or nag-iisa ka lang, at walang nag-cheer sa iyo, the app will let you share your activity to your friends, then your friends upload their messages, then you start the activity through the app, and the messages will start playing.
Hey good for you doing this. If you want more motivation doing this, I have a free app that plays motivational quotes (recorded by other users) to you. If you're running on the treadmill, then the app will play motivational quotes per X minutes. It's called Rundom App, available in iOS and Android
Good luck!