Does the app work without internet?
Location spoofing, saved places, history and voice input work fully offline. Internet is needed only for the map, searching for new addresses and sync.
Saved places are stored on the device, so you can turn on spoofing at the right point without a connection. Speech recognition is local too — it works in airplane mode.
Without internet you cannot load new map tiles or find an address you have not searched for before: these are external services. Changes made offline sync automatically when the connection returns.