Record your intonation while playing or practising scales. Then after you have finished look at the results on the screen.
A series of graphs will be presented showing each pitch detected by the app and how far off perfect intonation it was played. The graph shows the proportion of time each intonation was played. Sharp notes are coloured red, and flat notes blue. Ideally each graph should show a green spike exactly in the centre.
A second tab shows the raw data readings displayed on a musical staff so you can see which notes in the melody were played with poor intonation by the colour displayed.
This app does of course tell you nothing that your ears shouldn't have heard while playing, but gives visual feedback to help narrow down why your intonation wasn't sounding as perfect as it should.
Tuning is equal-tempered,with an adjustable (A=440HZ) reference frequency.
