Can I use Survey Anyplace in offline mode?
Yes, this is a big advantage when the quality of the wifi is not guaranteed or when you can’t connect to a 3G or 4G network. 90% of our features work in offline mode. Collect responses offline throughout the day and the data will automatically be uploaded to the servers when the device connects to the wifi or 3G/4G network later on.
The only features that are not supported in offline mode are the usage of YouTube movies and MP4 files (movies) and the ability to work with the Facebook features as these require an online connection with Facebook.
More information here.