You will need to connect your tablet to the internet in order to log into the app and retrieve your survey for the first time. After this you can go ahead and collect your data offline. This is because the responses get stored in the app itself, so you won’t lose any of your data if you go out of wi-fi range.
When you are ready to upload responses to The Audience Agency’s server (which in turn, get uploaded to the Audience Finder Data Tools), you will need to connect the tablet to the internet.
If you have a stable internet connection at all times, the app will still work in the same way and you will still need to periodically sync your tablet to upload responses to The Audience Agency’s server.