TN-1G(guitar tuner) It's free!

You can get perfect pitch, it's easy!

TN-1G detect the pitch of notes that picked up by a microphone, and it displays the difference from the fine pitch. It's easy to use, but high-precision high-performance, and supports alternative tuning for more than 50.

Currently, you can tune your guitar, Standard, Half Step Down, Full Step Down, 1&1/2 Steps Down, Drop-D, Double Drop-D, Drop-G, Drop-C, Drop-C&G, Drop-C(another set), Open D, Open E, Open E7, Open Dm, Open Em, Open Em7, Open Dmaj7, Open Dadd9, Open G, Open A, Open A(another set), Open Gm, Open Am, Open Am7, Open G7, Open Gmaj7, G6, Dsus(DADGAD), Open C, C6, Open F, F6, Taro Patch, G Wahine, Leonard's C, C Major(Atta's C), Keola's C, Mauna Loa, Old Mauna Loa, Dmaj7 Wahine, F Wahine and Double Slack F, Modal G(Gsus), Open C, Open C#, Open Cm, C Spanish, and Perfect 4th.

You can change reference pitch-A between 438Hz and 445Hz.

TN-1G has a tuning fork that emits a pitch corresponding to each string.
To make the sound, please tap the image of the tuning fork. By tapping again, you can stop it.

If the meter makes a jerky movement, please try twang harmonics(flageolet tones) on 12th-fret. May result in smooth movement.

TN-1G will support tuning of your guitar until the day you hire an instrumental technician.

Tested devices
Galaxy Nexus(SC-04D) SAMSUNG [Android4.2.2]
Nexus7(2012) ASUS [Android5.1.1]
Nexus7(2013) ASUS [Android6.0.1]
Nexus5X LG [Android6.0.1]

Permissions
RECORD_AUDIO: It is necessary to use the microphone.
BILLING: It is used to process of in-app purchase.
INTERNET: It uses to show ads.
ACCESS_NETWORK_STATE: It uses to show ads.
ACCESS_WIFI_STATE: It uses to show ads.
WRITE_EXTERNAL_STORAGE: It uses to show ads.
ACCESS_COARSE_LOCATION: It uses to show ads.
ACCESS_FINE_LOCATION: It uses to show ads.