I tested it and it worked perfectly. The TelloFPV app for Android recognized control easily, and as you said, without Octopus: It's a cheaper solution for those who own Android. I recommend.
Yes. It works via BT, and without any octopus. However, you need to set "Android standard game mode" in the ipega 9078 controller by pressing X + ipega button. Of course, this is a configuration for androids. First you have to pair the controller with your phone and then you run TelloFPV app (. The application should detect it by itself and you will see it in the controller settings.