Well tempered is indispensable to perform baroque music.
In these temperaments, Meantone was more important temperament than others, because of long term use.

With this app, you can investigate a correct numerical pitch value and a correct pitch sound of some temperaments which are Pythagorean, Just Intonation, and especially Meantone.
And you can change a key by flicking music, so that you will understand how each degree's pitch change in each temperament's change.

How to use as follows:

-How to operate music
flicking a music view left or right, changing a key.
flicking a music view up or down, changing a clef.

-How to play
Tap a music view where you want.

-Sustainable of sound and pitch display
Turn on Hold Switch, then sound and pitch display will be sustainable. if you want to stop sound, tap "Off" switch next to Hold Switch.

-About pitch display
In a Hz display, the real frequency is displayed. In a cent display, it displays a cent value against a keynote of current key, or a cent value against pitch A. You can select a standard of cent.

-Setting of tuning, temperament
Turn on info switch then moving to setting view. In Setting View, you can change a tuning and temperaments.

Explanations of each temperaments:
1.Equal temperament
All semitone is 100 cents. Most general temperament on modern music.
2.Pythagorean Wolf:Eb-G#
It's based on perfect fifth pitch. Accumulation gap(wolf fifth) is placed Eb-G#. Wolf fifth means a particular fifth interval that is added Pythagorean Comma to perfect fifth.
3.Pythagorean Wolf:D-A
Wolf fifth are placed D-A. In a key C, Three triad, C-E-G, F-A-C, G-B-D are almost pure.
4.Just Intonation
Twelve degree's pitch aren't fixed. Each degree's pitch depends on a key. And an enharmonic pitch is different. For example, C# and Db are different pitch.
5.1/4 Syntonic Comma
General Meantone temperament. Wolf fifth is placed Eb-G#. The interval of major third are pure.
6.1/5 Syntonic Comma
A kind of meantone. Wolf fifth is placed Eb-G#. The interval of major third is little far from a pure interval.
7.1/6 Syntonic Comma
A kind of meantone. It's common on general baroque music. Wolf fifth is placed Eb-G#.
8.1/7 Syntonic Comma
A kind of meantone. Wolf fifth is placed Eb-G#. Very near to Equal temperament.
9.Werkmeister III
A kind of well tempered.
10.Kirnberger(1766)
A kind of well tempered. D-A is shorter by syntonic comma.
11.Kirnberger(1771)
A kind of well tempered. D-A, A-E are shorter by a half of syntonic comma.
12 Kirnberger(1779)
A kind of well tempered. C-G-D-A-E are same as Meantone 5th.

By the way, the icon of this app is a portrait of Monteverdi, a great baroque composer.