What are some alternatives?
When comparing OCM (Open Cache Manager) and iCaching, you can also consider the following products
c:geo - c:geo is simple yet powerful unofficial geocaching client for Android devices.
Geocaching - Geocaching is the premier app for locating geocaches. This app is available for both the Android and iOS platforms, and it makes locating these popular hidden treasures easy and fun.
Cachly - Join the treasure hunt with the essential geocaching partner for iOS
GlobalBucket - Application for sharing the nicest places and the best activities on earth.
Play Munzee - Similiar to Geocaching but requires players scan a QR Codes instead to validate find.
GSAK (Geocaching Swiss Army Knife) - GSAK is the all in one Geocaching and waypoint management tool.