Been using Strobe Tuner Pro: Guitar Tuner for a couple months now. It’s basically a music app that uses your phone’s mic to tune your guitar, violin, ukulele, or pretty much any other stringed instrument. Pretty solid app if you’re into music and need an accurate tuner.
Here’s what you do: you just play a note on your instrument and the app will show you exactly how sharp or flat it is. There’s also a cool strobe tuner feature that actually displays the vibrations on your screen – it’s like having a professional-grade tuner right on your phone. And the chromatic tuner is handy for when your instrument is way out of tune and you need some help getting it back in the ballpark.
Look, if you play guitar or any other strings, you’ll probably like this. It’s not perfect – the ads can be annoying if you don’t pay – but overall it does the job. Worth checking out.