Cool idea.

So like Guitario, but with an actual guitar instead or a virtual one.

yes i've been looking for this kind of feature.
Fretboard trainer: that asks player to play a certain notes randomly, or within the scale (using scale degrees).

I don’t thing yousician finds this upgrade important as these posts are really old. My next option is to find an note to guitar app and vice versa.

Great idea - it would be good to eventually play from written music rather than tab, and this would be a great way of starting to learn. Maybe include a couple of e excises in each section - perhaps learning the individual notes that go to make up the chord you are learning would be a start. Also, in the details screen you could have the notes named. Anything that would help to use our new-found skills in the "real world"!

I like this idea with also a scale option.

Nice idea, ask for a note on string and let the player find it. I would also combine it with scales. That is, only notes within a certain scale.