Hi Product Hunt! I built Margin because the edges of my MacBook trackpad were doing absolutely nothing.

Rest one finger on an edge for a second, then slide. The edge turns into a tactile slider, and what it controls dynamically adapts to whatever app is front and center:

Zoom, scrub, switch tabs, and undo across apps by hooking straight into native menus—no configuration required.
Pre-built control maps for 50+ apps and 13 web tools, including Final Cut Pro, Zoom, YouTube, and Google Meet.
Deep integration for tools like Blender, complete with live numeric readouts and a haptic tick on every keyframe.
Quick gestures like sliding the top edge to skip tracks, with the current song title piped into your menu bar.

Standard two-finger macOS gestures and regular cursor tracking stay completely untouched. Everything processes locally on-device with zero network trackers, accounts, or telemetry.

Every feature is completely free through November. Moving forward, core volume scrubbing and track skipping remain free forever, while advanced app profiles will be part of Pro at $12/year.

One quick heads-up: this is an early build and isn't Apple-notarized just yet, so Gatekeeper will ask you to click "Open Anyway" on the first launch (instructions are right on the download page).\

I'd love to hear your feedback—what apps or custom actions should I wire up next?