Coverage? Lite is essentially a free iOS trial of Coverage? – it allows you to use the full app with standard definition overlayable maps for a few sessions to check it out, before forcing you to pick a single carrier to continue for free.
Or, you can upgrade to the full versions in-app. Coverage? was originally launched long before in-app purchases were a feature, and originally we had LTE Finder as our free demo version – which Coverage? Lite replaces.
Coverage? for Android starts out as a free trial, with in app upgrades to the full versions.