Classroom
In the classroom
Kids play their instrument into a phone or a Chromebook, and the browser hears whether the notes are in tune. Every note levels up their school. It is free, with nothing to install and nothing to manage.
How a first class goes
Open your school's page.
Use the finder on the home page; almost every school in the country is already listed.
Project the live board.
The Project button at the top of the school page opens a full-screen board for the projector, and every session lands on it as it is played.
Two kids at the mic.
Each plays for a minute or two while the class watches the school bank the XP. The week's sessions ribbon lands at ten sessions of a minute or more, so a class that keeps taking turns earns it inside one period.
Print the poster.
The poster button next to it opens a one-page sheet with the school's QR code; on the wall, kids scan it and play at home for the school.
What you never have to do
No roster. No logins. No grading. No practice logs to chase. No reports to read.
The whole school levels up together. No student is ever measured or named.
The promises
- Free at school, forever.
- No student-created accounts. A sign-in only ever comes from a family account a parent creates, and it is never required at school.
- Audio never leaves the device. Pitch detection runs in the browser; nothing is recorded or uploaded.
- No ads, no trackers.
- Nothing paid ever changes a school's standing.
The details are on the privacy page.
Questions directors ask
- My students won't use another app.
- There is nothing to install and nothing to sign into. They open a link and play. It works on the Chromebook cart and on a phone.
- I don't have time to manage another thing.
- There is nothing to manage. The school's page updates itself as sessions land, and weeks close Monday morning.
- Is this COPPA-compliant? What about the microphone?
- Blini is child-directed by design: no accounts, no names, no personal information collected. Audio is processed in the browser and never stored. The privacy page has the details.
- How do I know it works?
- Open the demo school, Harmony Middle School, which has twelve weeks of play on its page. Then open your own school's page and play a session yourself.
- What if only one student plays?
- The weekly sessions ribbon starts at ten sessions of a minute or more, and one student can reach that. A school with one kid playing still has a winnable week.
Try it
The demo is Harmony Middle School, twelve weeks of play. It opens in a new tab.