Neat app
Good clear graphics. Sensible editing so you can enter your own fingerings. More useful for a new bassonist than an experienced one perhaps. Good as a reminder of the less common notes which is easily accessible whilst playing. I would like it to show trill fingerings (tricky I know). This would make it much more useful. Moving up or down the stave requires fine finger control - an option to + or - a semitone would get over this.