The PandwaRF uses a cloud connection to check for FW updates, provide anonymous statistic data about crashes, ANR etc. This is default Android/Google behaviour.
But you can still use your PandwaRF without being connected, it will work. However you won’t receive any FW update and will not be able to use the “Post data to API” feature (cf. github.com/ComThings/PandwaRF/wiki/Android-RX-Data-Post-Rest-API).
And we will not be able to spy on you and make money by selling your personal data to evil third parties. No, we are kidding.