NeonLock turns your iPhone into a remote lock button for your MacBook. Tap one glowing button — the Mac locks instantly over Bluetooth. Leave the radius, and it locks itself. A direct encrypted link between two devices you own.
brew install --cask sparksss/neonlock/neonlock
Two pieces, one product: the iPhone remote + a tiny menu-bar agent on your Mac.
The button's color is the app's state — amber when idle, cyan when ready, violet while sending, lime when locked.