What fingering style is it using? Is it customisable?

The ‘acoustic’ fingering is Baroque, allowing for forked positions and correct pitch on many notes and variations. The holes of the recorder have embedded invisible capacitive sensors and the C, D and thumb holes are doubled to allow sharp notes and octave switch. With the app configuration page you can change between different fingering and scales and even setup your own, also allowing for microtuning fingerings. This will allow other instruments fingering styles like tin whistle, bagpipes, and your own!