Focen runs silently in your menu bar and figures out when you're working. After some activity in your work apps, it starts tracking a session automatically. When you drift to Instagram, YouTube, or a game, it gives you a grace period, then closes the tab and brings you back. If you've been working for 90 minutes straight, it locks your screen for 5 minutes and makes you take a real break. Everything stays on your computer. Just a dot in your menu bar that pays attention so you don't have to.
