Download MyTrails directly from this site.
MyTrails removed from the Play Store
Since late 2011, Google has removed MyTrails from the Play Store, incorrectly stating that it uploaded users’ “social account info” to my site.
Since then, they have made it a policy to remove apps that have not been updated for two years, in an effort to purge older apps.
I’m no longer interested in jumping through their ever-changing hoops, so MyTrails 2.1.11, linked above, will remain the last version. It still works on even recent versions of Android.
The license application is also no longer in the Store and in-app purchases no longer work, but the Pro license can still be purchased directly.