Free percussion timing-grid app

Build, project, and share exact timing-grid exercises.

The right grid. Right now.

Grid Board gives percussion teachers and students a large, playable classroom view for verified sixteenth-note and triplet timing grids—without redrawing the board or digging through a packet.

Open Grid Board → Read the operating guide

No download. No install. No account. Free forever.

Grid Board showing a 2-note sixteenth grid in four-bar form with the check on, four measures of cells across the projector view, and the tempo at 96 BPM. — A 2-note sixteenth grid in four-bar form, check on — the whole rep on one board.

Four bar Check and pattern loop

Measure 1 CK CK CK CK

Measure 2 A A A A

Measure 3 CK CK CK CK

Measure 4 A A A A

Check Pattern Playing Four-bar form: the check and the pattern alternate, so the room hears the reference immediately before every rep of the exercise.

See it in action

The real board, on the projector

A 2-note sixteenth grid in four-bar form, alternating check measures and pattern measures across four rows. — **Four-bar form**The check and the pattern alternate, so the section hears the full subdivision against the rep.

The complete 4–2–1 form on the board, with the 4s, 2s, and 1s sections stacked and every variation cycled in turn. — **The complete 4–2–1**Every variation cycled through 4s, 2s, and 1s — the whole climb in one view.

The board mid-playback, with the live highlight on the cell currently sounding and the remaining cells dimmed. — **Live highlighting**Playback walks the grid cell by cell, with an audio click for reference.

What you can build

Built for the band hall projector

Sixteenth-note and triplet grids

Choose the grid family, then how many positions are played: one, two, or three attacks per beat on sixteenths, one or two on triplets.

Variation, written rate, and check

Pick the variation and pattern order, write the grid as quarters, eighths, or full subdivision, and turn the Check on for a full-subdivision reference.

Four-bar and complete 4–2–1 forms

Run a four-bar rep or the full 4–2–1 climb, with live highlighting and an audio click reference as the form plays.

Board-only mode

Hide the setup panel for a clean projector view. If native fullscreen is unavailable, a board-focused fallback takes its place.

Links that reopen the exact exercise

Copy link reproduces the grid, played positions, variation, pattern order, written rate, check setting, form, and tempo — no account or cloud record required.

Teacher presets, saved in the browser

Save a rep you use often under a name, then load, rename, delete, or copy its link in one press. A preset and a link are the same rep described two ways.

Practice on Tempo Ladder

Open a slow–fast–slow climb to the board's tempo, named for the grid, so the section can work the same rep up to speed.

Help that works on school devices

Report a problem and Request a feature open a visible message with app, build, page, and browser details, plus Copy details for a managed device with no email app set up.

Classroom trust points

Nothing to sign into, nothing collected

No account, no recordsNo install, no student profile, and no classroom record. Grid Board runs client-side.
Presets stay where you saved themThey live in that browser, not an account. Links are how a rep moves between devices.
Accessible operationKeyboard operation, visible focus, and reduced-motion support throughout.
Forever freeResponsive projector, tablet, phone, and board-only layouts — free and account-free.

How it fits the app family

Grid Board holds the grid; Tempo Ladder holds the tempo

Grid Board presents and cycles timing grids — it is not an assessment tool. Tempo Ladder organizes tempo; it does not render or store the grid. Only the exercise name and tempo intent pass between them.

Grid Board

Projector-first timing grids, forms, presets, and shareable exercises.

You are here

Tempo Ladder

A slow–fast–slow climb to a target tempo. Grid Board can open one named for the rep on the board.

Open Tempo Ladder →

Pulse Pocket Metronome

A metronome that shows the rhythm — subdivisions, patterns, counting, and sticking.

See Pulse Pocket →

Put the grid on the board

Open Grid Board — free, no account, nothing to install. Need a walkthrough? The guide covers every control, form, preset, and share link.

Open Grid Board → Read the operating guide Explore All Apps