Magpie Tuner is a fast and accurate app for tuning the pitch, and is a good helper for you to debug your musical instrument.
It has the following features:
1It can quickly and accurately calibrate your various musical instruments, such as guitar, ukulele, erhu, etc., as well as various wind instruments and folk instruments.
2. Cent offset indication: The pointer indicates the current pitch offset of the quasi-tone, which is simple and intuitive, and is convenient for users to check the calibration status;
3. Note name display: including note name, note name offset direction indication, note offset, and transposition mode.
4. Score fluctuation curve: combined with signal changes, it is possible to observe the state of the equipment within a certain range, and to see the stability of the sound signal emitted by the strings very intuitively;
5. Metronome: Set any time, and change the beat of the metronome or click the beat speed you want

Subscription service: Unlimited access to all content after subscription. The specific price varies depending on the country where the user is located. The system will charge through the iTunes account. The user must manually turn off the automatic renewal function at least 24 hours before the end of the current subscription period, otherwise the system will automatically renew the service. The next month’s fee will be deducted from the user’s account 24 hours before the end of the current subscription period. Users can manage the subscription service by themselves, and manually turn off the automatic renewal function in the iTunes account settings options. After the user pays for the subscription service, the remaining free trial days will be automatically cleared.

User Agreement: https://docs.qq.com/doc/DVlFTRFB2VlVWRmF6
Privacy Policy: https://docs.qq.com/doc/DVk5IVHFzb2NxaHpS