Stackapella Open the app
Free tools

17 free tools

Free tools for singers and musicians

Tune, keep time, find your voice, your key and your starting note, right in your browser. Free, with no account and nothing to install.

Most used

Tune

Check a pitch or give the group its starting note.

Keep time

Set a tempo, or find the one a song is in.

Know your voice

Your range, your part, and the key that suits you.

Chords & harmony

Move songs to a new key and split chords into parts.

Train your ear

Short drills for hearing intervals and chords.

Check your setup

Make sure your mic and headphones are ready.

Warming up? Warm-ups to sing along with⁠

Free tools by Stackapella

All of these are free, and so is every course.

Stackapella teaches you to sing harmony one part at a time, right in your browser.

Stackapella recording the alto part of Amazing Grace: each note is a bar with its name, and the one being sung says A little low, go up. Stackapella recording the alto part of Amazing Grace: each note is a bar with its name, and the one being sung says A little low, go up. Stackapella recording the alto part of Amazing Grace: each note is a bar with its name, and the one being sung says A little low, go up. Stackapella recording the alto part of Amazing Grace: each note is a bar with its name, and the one being sung says A little low, go up.
  • A guide sings your partHear your line over the others, slow it down, then take your turn.
  • Your notes light upEach note shows where you landed, and a hint when to go up or down.
  • Record every part yourselfStack your takes in time until you're the whole choir.