What are some alternatives?
When comparing OCM (Open Cache Manager) and Play Munzee, you can also consider the following products
c:geo - c:geo is simple yet powerful unofficial geocaching client for Android devices.
InternetCaching - An internet treasure hunt platform.
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.
Gift Hunt for WordPress - Online treasure hunt on your WordPress site
iCaching - iCaching is the all-in-one Geocache manager for the Mac.
Ingress - Winner of the Grand Prize at the 2015 Japanese Media Arts Festival Ingress transforms the real world into the landscape for a global game of mystery, intrigue, and competition. Our future is at stake.