In the setup of Alby Hub (which is not in any App Store actually) you will get prompted to open a channel (which is the core concept and requirement of lightning) and are needed to receive and send payments. Lightning channels from service providers (there are 4 supported) cost money.

We know this is a new and still complicated concept and we try to make it usable... any feedback is greatly welcomed.

You must have clicked on "Confirm Payment"...

No need to use all those swear words, feel free and go to use other services!

We're happy to help and explain things and also look into your case if you send details to support.