Why we built a native block editor
One writing surface for words, diagrams, and the edits between them.
Product and engineering
Building Phrase
Inside our native block editor.
Writing interactions, rich notes, and the engineering behind them.
A faster way to rearrange notes on iPhone
Swipe to select one block. Sweep to gather a group. Drag to move it.
Math, diagrams, and sources in one native note
Keep the calculation, its explanation, and the source together.
Building a native block editor with Swift and CoreText
How we connect UITextInput, NSTextInputClient, and text layout to keep editing responsive as notes grow.
Editing text across block boundaries
One text range, one replacement, with the rest of the note intact.
Save Twitter links with the reason you kept them
A recognizable source, with your own thinking beside it.
One geometry for text, selection, and native input
One shaped layout behind the words, their selection, and the next character.
Getting IME composition right in a native editor
How we handle marked text, candidate changes, and the moment a phrase is accepted.
Native math and Mermaid diagrams in a Swift editor
Two renderers, one editable document, and the geometry between them.
Making small edits fast in a 10,000-block document
Our layout approach, measured results, and a small edit in a long note.
How we built a native block editor for 10,000 blocks
A document that stays whole, with layout and native views focused on the passage you're editing.