iOS - solution checker   Turn this feature on, filter for caches that have the Geocaching.com solution checker, then check your solution on the waypoints screen:   Open the waypoints screen of a cache that has the Geocaching.com solution checker. Tap the pencil icon to edit the posted coordinates under Existing Waypoints. Enter your coordinates and tap “Check solution”. You have ten tries per ten minutes. If you have entered the correct solution, you c