With Chordify you can play along using a Guitar, Ukulele or Piano.
We have also recently added support for Mandolin! Currently Mandolin is only available on the Chordify website though, not the Android/iOS app.
Please note: At Chordify we're currently mainly focused on extracting chord data from songs—our algorithm is not at a point where it can reliably transcribe individual melody lines. This means we only serve chords – or one hand for piano players.