Mandolin Tuner EM-1
This mandolin tuner app has very simple user graphics and smooth controls which makes this app really easy to use. There is no training required to start using this mandolin tuning app. And it is free to download and use.
Full description
Alternate mandolin tunings (Piccolo, Sopranino, Tenor, Alto, Octave, Mandola).
Adjustable reference note frequency (A440).
Automatic detection of tuned strings.
Most common chords with fingerings and string tones as quick reference.
Various note naming schemes: English (CDEFGAB), German (CDEFGAH), Latin (DoReMiFa...)