Close your MacBook.Keep your AI agents running.
No external monitor, dock, or charger required.
One-line installClick to copy, paste in Terminal
Installs and opens in about 10 seconds. Completely free to try.
Hold Fn.
Close the lid.
Thermal protection
Heat climbs.StillOn knows when to stop.
StillOn reads battery temperature and macOS thermal pressure while the lid is shut. If either climbs too far, it stands down and lets the machine sleep. Keep every running Mac on a hard, open surface. Thermal protection does not make a bag safe.
Agent sessions
Sleeps by itself,when the agent is done.
Start the run, close the lid. StillOn keeps the Mac awake exactly as long as your agents are working - the moment the last one finishes, it lets the machine sleep.
Claude CodeCodexOpenCodeCursor
OpenCodeTask finished. Battery kept.
Why not just pmset?
One app.Or a terminal babysitter.
StillOn15 matched runs
We tested the other apps. StillOn used the least battery.
Five apps. Three samples each. Every other app kept the screen burning power behind a closed lid.
Read the full studyClosed-lid power draw
Lower is better- StillOn1.76 W
- Clamshell2.90 W
- pmset0% brightness2.98 W
- Vorssaint0% brightness2.99 W
- Amphetamine0% brightness3.03 W
- Vorssaint100% brightness9.73 W
- pmset100% brightness9.74 W
- Amphetamine100% brightness9.80 W
One purchase. Yours for good.
Keep Your Mac Working.
Buy the lifetime licence, or keep going on the free trial.
One-line installClick to copy, paste in Terminal
Installs and opens in about 10 seconds. Completely free to try.