Ghost Mode vs Caffeine — Do They Solve the Same Problem?
Caffeine is a lightweight, popular utility that prevents Windows from sleeping or starting the screensaver — it works by periodically sending a signal that tells the OS "the user is still here," without generating real mouse or keyboard input. That's a different job from what activity-percentage trackers actually measure.
| Feature | Ghost Mode | Caffeine |
|---|---|---|
| Primary purpose | Simulates genuine input activity for time-tracking software | Prevents screen sleep / screensaver only |
| Generates mouse/keyboard input events | Yes | No — it suppresses the idle signal at the OS level, not via input |
| Effect on Hubstaff / TimeDoctor activity % | Registers as active input, contributing to the activity percentage | None — these trackers watch for input events directly, not OS idle state |
| Window / app switching | Yes, configurable | No |
| Cost | Free 10-day trial, from $3.99/month | Free |
Verdict
Caffeine and Ghost Mode solve different problems. If you just need your laptop to stay awake during a long download, Caffeine is the right free tool. If your concern is a time tracker showing you as idle or lowering your activity percentage, Caffeine won't move that number — most trackers read raw input events, not the OS sleep timer. Ghost Mode is built for that second scenario.
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