guitartuna is the easiest, fastest and most accurate tuner app in the world! the ultimate tuner for guitar, bass, ukulele and all popular string instruments. guitartuna has been downloaded over 20 million times and is used by beginners and experts! why is it the world’s most popular tuner ever built? • simple and easy to use. works with both electric and acoustic guitars and string instruments using the built-in microphone. no cables needed. • perfect for complete beginners. recommended by guitar teachers. • simple and intuitive. clear visual feedback with signal history. award winning audio technology: • built on the world's most advanced audio recognition algorithm - the same technology powering yousician • professional accuracy for advanced players • auto mode tuner (for super fast t