Text diff that reads minds
A from-scratch Myers engine with character-level highlights, side-by-side and unified layouts, change bars, collapsible regions, and jump-to-change navigation.
macOS · SwiftUI · Liquid Glass
Every difference,
made obvious.
A native Mac app for comparing and merging text, images, and folders, with git built in. Zero dependencies, written entirely in Swift.
v0.1.1 · Apple-notarized · free & open source · requires macOS 26
Signed & notarized
macOS 26 Tahoe
MIT licensed
Zero dependencies
What it does
Six ways to see what changed.
Pixel-perfect image diff
Two-Up, One-Up blink, Split reveal, and a false-color Difference mode where only the changed pixels glow.
Whole-folder compare
Recursive scan tags every file Added, Removed, Modified, or Identical. Drill straight into the right diff.
Git, and a Custom Comparison popover
Open any repository to browse commits and changesets, then compare any reference or commit against your working copy. Save the ones you reach for and reopen them live.
Three-way merge
Base, left, and right with an editable result. Take a side, take both, or hand-edit, with conflicts called out.
Liquid Glass, throughout
Native macOS 26 materials on every toolbar, switcher, and popover. It feels like the system, because it is.
In the wild
Built to be lived in.
Get Differentialis.
Download the notarized .dmg, drag it to Applications, and open. No setup,
no account, no telemetry.
v0.1.1 · Apple Silicon & Intel · macOS 26 Tahoe