UD Tuner 8.0 ios官方版

UD Tuner is a tool for tuning Turkish/Arabic musical instrument Oud. It can also tune
instruments cumbus, tanbur and lute

*It can listen to instrument sound and measures the sound frequency. So it gives directives for finding the correct tune.

* It can run in two modes with manual string selection and auto string selection

*It can also produce reference sounds when touching the strings on screen

* you can reach 0.01Hz professional sensitivity in a silent room

* it is a paid app, so you just buy the app, it doesn't run in subscription or auto-renewal mode. 
You just pay only once