Unfortunately, Mac and iPhone users have been neglected to this day. This is based on the fact that the app account (the app store) at Apple costs a certain amount "annually". Of course, this doesn't pay off for a free app! But now this is also possible for Mac and iPhone users!
Of course there will also be various downloads and specialist knowledge on the scale, etc.!
An app with a print function and more stringed instruments is still in the works!