Every time Under Armour buys an app it completely stops growing or improving the app. Any fitness app developers out there need to know that selling to Under Armour means the end of your app.

Would you end your app for 500 million?

> Endomondo seemed to stop evolving around the time it was acquired by Under Armour.

I've noticed the same. Among my issues with it is that the accuracy of distance traveled has been way off for more than two years. Some releases it tracks optimistically high, other releases it tracks consistently low. This has been persistent over multiple phones and multiple Android releases. I've compared it to Google maps, mapmyrun, and my car odometer and it's always off.

I'm strongly tempted to write my own "anti-social fitness app" that just collects data and exports it.

That's pretty much what Google MyTracks was. Of course, it's been discontinued.

They hadn't released anything new for a long time when that happened either. There doesn't seem to be any pressure to innovate in the fitness tracker space.