DoReMi on Guitar [iPhone]

Guitarists, especially jazz and solo guitarists, seem to realize the need to figure out the "Do Re Mi (C, D, E) (P1, M2, M3) on the guitar" at a relatively early stage.
One common reason is the lack of TAB notation in teaching materials and theory books, but there are many other things that are good to figure out.

So what is the state of knowing the do-remi (C,D,E) (P1,M2,M3) on the guitar in the first place?

1, Can read the staff.
2, Can understand a song or phrase in terms of Movable-Do
3, Can understand the notes that make up a chord.

If you can read staff notation, you have access to a vast amount of information. Many music theory materials do not have tab notation. In addition, it is often the case that the music you want to play is only available in staff notation....
If you can figure out the degrees, you will be able to deal with key changes. Low chords can be changed quickly with a capo, but if you are using single lines or high frets, it is not so easy.
You can play any chord you want on any fret, on any string. If you can figure out the notes that make up the chord you like, it's easy to hold it on a different string or transpose it to a different key.

This app allows you to practice "Do Re Mi (C,D,E) (P1,M2,M3) on guitar" in all keys based on the "EADGC" form.
*EADGC forms are five forms developed to efficiently grasp the guitar fretboard. It is a must for intermediate and higher guitarists.

The system also displays your current progress so you can keep track of your strengths and weaknesses.
We have tried to make the exercises as musical as possible. I don't think that non-musical up-and-down exercises of scales or exercises with random do-re-mi questions are very effective.
We have also added a small element of Jazz-Solfege, which is a bridge to the advanced level.

When using this application, please use it in an environment with as little noise as possible. This is because the mechanism is designed to pick up the sound of the guitar and determine if the sound is correct.

Finally, a tip for practicing is to imagine the outgoing note before you play anything on the guitar.
If you imagine it after you play it, you will end up tracing it, so instead, imagine the sound before you play it. Then, once you have a solid image, actually play it to see if it is as you imagined.