Alternative_Tuner app for iPhone and iPad

Alternative_Tuner is an accurate guitar tuner for high performance. It works automatically. Detects the string, the fret and the degree of deviation from the perfect pitch of the note.
There is a list of alternatives tunings where some strings are lowered or tone up with respect to the standard tuning: EADGBE (MI LA RE SOL SI MI) giving the guitar different characters depending on the type of pitch.
When selecting a type of pitch, 6 buttons representing the 6 strings are illuminated. Pressing one of these buttons hear the note corresponding to that string and having a reference sound of the note to reach.
The indicators clearly show whether we raise or lower a string, or if the pitch is correct.

Types of tuning:
Standard
Drop D tuning
D for Flamenco Rondeña
Open D tuning
Open G tuning
Low C tuning
Open C tuning

Usually Alternative_Tuner iOS app used & searched for