Wherigo® vs Hecate

Play Wherigo™ cartridges on your iPhone! Wherigo™ cartridges are GPS-enabled adventures in the real world. Use GPS technology to guide you to physical locations and interact with virtual objects and characters. Download cartridges for free from the official Wherigo™ web site right from the app and play at your leisure. Note that cartridges are retained for as long as you need them and do not expire. Time estimates given on the web site and in the cartridge description are for expected playing time. 1) With newer devices, you can download cartridges with your computer and drag and drop to the Wherigo app folder in iTunes. 2) You can also drag and drop .gws files to upload with your browser if you have trouble uploading from the app. 3) Be sure to select "PocketPC" as the device when downloading cartridges for best results, although any device should work.

Hecate is a map of the real world you have personally discovered. 
Start a walk and watch streets, neighbourhoods, and cities emerge as you move. Explore your current city, see how much of it you’ve uncovered, and keep your discoveries private and synced across your devices. 
Hecate uses background location only during an active walk, so your route can continue to be recorded while your screen is locked. Finish the walk at any time to stop tracking. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/