Используйте приложение APKPure
Историческую версию Guitar Tuner 2018 можно получить на Android
Если вы beginer для гитары, это приложение для вашего, это очень легко для тюнера
Very easy for new version 2018, guitar, bass, ukulele, electric or accountic guitar, violin etc.
Chromatic Guitar Tuner is a fast, accurate and easy-to-use app offering pro level of tuning precision!
The app features different tuning modes, a list of standard and alternative guitar and ukulele tunings, complete with extra tools for beginners and pros.
It’s totally free!