Hey @Nicolas_Szczepaniak yes as shown in the tutorial link above i used bubble as the backend.
For performance if you’re talking about speed then it will all depend on how you structure your bubble database and how you write your api workflows. But from my little experience the speed is as expected. In your case where you’re thinking offline capabilities then things should be faster as you will not be always requesting data from the backend anyway.
In terms of security again it all depends on you. Bubble can be as secure it can be. You can use the data privacy setting in bubble and also set your api workflows to require authentication.
Regarding scheduling backend workflows, yes you can definitely do that. Actually anything you can do in bubble you can do - you’re simply replacing the bubble front-end with AppGyver.
For push notifications currently the limitation is from AppGyver’s as there are no actions for getting the device and registering a device for push notification. But once this is done you can use any of the different push notifications plugins in bubble for sending the push notifications.
Hope this helps. Let me know if you have any more questions.