The tuner can be used for tuning of many types of musical instruments which include Flue Pipe, Reed Pipe, Accordion, Great Highland Bagpipe, Pipe Organ, Brass Instrument, Hammered Dulcimer, Hammered Dulcimer402, Guitar, Chinese Zither, Ukulele, Harp, Pipa, Bowed String, Violin, Viola, Cello.
You can use all functions within 30 days of first download, and after 30 days you can tuning several notes for free if you don't purchase any instrument type in-app.

Main characteristics:
The detection accuracy is better than 0.1 cents.
It can automatically recognize the pitch of each key or string.

App limitations:
Within 30 days of the first start-up of this App, you can use all of the functions (*). After this deadline, the use of functions will be limited. These limitations include that you can only tune several tones for each instrument type, you cann’t choose other temperament and tuning type, and you cann’t modify the note pitch.
When a type of instrument is purchased in-app, all restrictions on the type of instrument will be lifted.\
* Make sure iCloud is available for this App.