Application now provides easy, advanced and hard trainings. Voice and images are guiding you through whole training. With some luck they will set to to correct training wave and you will need no app to train. FBB's balkba will be all you need.
That is why the application is extendable by custom trainings and even FBB crew may add new in some time. You can select voice, shrink or prolong training or its parts. You can also view training in book-like format
Application supports CZ and EN language (without limitations to custom trainings) and except mobile app it provides also PC client ( https://github.com/judovana/FlashBalknaSwing ), which have colourful console - true X less - text version for hackers and mad men.
Here is also hard work made on editor of trainings (not finished, if you wont custom training now, you must pack XMLfiles and images (and even sounds if you wish!) together. Example is at https://github.com/judovana/FlashBalknaTestPlugin )
This app may request network permissions. Those are for plugin uploading and nothing else. Feel free to revoke them.