This ultra simple "app" simply starts Strava and begins recording a ride/run using its NFC intents.
I find it to be very useful and I record more rides because of how fast and easy it is to do once its just a single tap.
•NFC intents are a new feature for Strava and they still may have some kinks. I've experienced some issues with them such as ride recording loops(stop recording and it starts up again right after). I've notified Strava of this and I'm sure it will be fixed soon.