CYCLING PERFORMANCE TIPS
Some of the apps in these blogs may be out of date, but I'll leave the links as they will provide suggestions of what others have found useful.
This article is a quick summary of a few options as of mid 2016.
A reader recommended this site.
My favorite app is RidewithGPS. It helps me find new routes when I am traveling. And as an added benefit I can map out upcoming rides and send links to friends so we don't miss each other when meeting up on the road.
If you have specific suggestions as to apps you find useful, please send them my way and I'll add them to this page.