Sketch the flow.
Keep the notes.
Side by side.
Tandem puts a fast infinite canvas and a calm notebook in one window. Map a feature, draw the diagram, and write down the tasks and ideas, without switching apps.
Free · No install · Works in your browser
Cut the first-run flow to three screens. Ship behind a flag first.
Do we ask for a team name up front, or later?
Built for the way ideas actually happen.
Half a diagram, half a list. Tandem keeps both in view, so the picture and the plan never drift apart.
Shapes that stay connected
Arrows bind to shapes and follow them around. Click a + handle to grow your flow one step at a time.
Notes that get things done
Checklists, headings, code and highlights, all one / away. Mark a note as a task or an idea and filter in a click.
Two panes, one train of thought
Resize, swap or focus either side. Drag a note onto the canvas to pin it right next to the diagram it explains.
Quick by default
Every tool is one key away, snapping lines up your shapes as you drag, and ⌘K jumps to any board or note.
Sign up once, synced everywhere
One account and you're done. Boards and notes save as you go and show up on every device in real time.
Take it with you
Copy a diagram straight into a doc, export PNG or SVG, and save any note as Markdown.
Your hands never leave the keyboard.
One key per tool. Shortcuts for everything else. Press ? anytime to see them all.
Start your first board.
It takes about ten seconds. We timed it.