Hello, I have developed an Android app to control Bittle through Bluetooth. I'ts still in Beta phase, but I think it might be useful for some people.
The .apk file can be downloaded from Github: https://github.com/EnriqueMoran/petoiBittleBluetoothController
You can control your Bittle as if you were using the IR remote controller (it has the same buttons but calibrate).
The instructions to use the App can be found in the Github repo (its very easy, just pair Bittle with your phone and control it from the App).
There are a couple of issues I'm still trying to solve (related to connection).
Please notice this is a Beta version and im still improving it, any suggestion is welcome.
Here there are a couple of gifs using the app:
If anyone need help installing the apk file, I will post a guide here.
Yes, there's a fourth robot called customized robot. You can define the keys for Bittle.