Stackapella Open the app

A free year for every one of your singers

For choirs, singing societies and school music bodies. Bring your members to Stackapella, and they each learn their part by ear, with a guide voice, for a year on us.

Write to Hillel

A plain email to Hillel, who built Stackapella. He answers it himself.

A free year for every member

Tell us roughly how many singers you have, and we make your organization a partner code with that many seats. Each member enters it once in the app for a year of Plus. You see how many seats are used, never who used them.

Choir groups for your directors

Your directors get the year too, and with it a choir group for an adult choir: share songs, give out the parts, and see who has started. They never see anyone's recordings.

Your own songs, part by part

Send us up to 10 pieces your singers learn, your own arrangements or public-domain music. We make each one a private song with every part sung by a guide voice, for your director to share with the group. Nobody outside it can see them.

Changes made for you

If something would make Stackapella work better for your members, a feature, a way of working or a change to a course, tell us and we'll build it at no cost, as long as it keeps members' privacy and safety and keeps the app simple for new singers.

A person to talk to

You write to Hillel, who built Stackapella, and he answers himself. There's a call to get started if you'd like one, and your feedback shapes what we build next.

Your name, only if you want it

If you'd like, we name your organization as a founding partner on this site. If not, nobody hears about it from us.

Good to know. Choir groups are for adults, up to 60 singers each. Members aged 13 to 17 can use the code too, under the same rules as a school class code, and younger children can play the lessons as guests, with no account and no personal details asked. Songs still under someone else's copyright need the publisher's permission first. Stackapella is in English only. We never track your members, sell data or send them marketing email.

What you'll use

Everything it does

Also for

Tell us about your singers.

Write to Hillel with your organization's name and roughly how many singers you have. That's all it takes to start.

Write to Hillel