I Built a Smarter 20-20-20 App Because Every Other One Annoyed Me

The 20-20-20 rule is a simple habit recommended by optometrists to reduce eye strain: Every 20 minutes, look at something 20 feet away for 20 seconds. The problem is that most 20-20-20 apps are so annoying that I end up disabling them within a week. They interrupt you mid-thought. They popup during meetings. They remind you even if you just stepped away from your desk. So I built Blink. Instead of blindly firing timers, Blink tries to understand context: in flow? it waits for a natura...