What Is Blue Light?

Blue light from phone screens is particularly problematic at night because it signals to your brain that it's still daytime, suppressing the sleep hormone melatonin. This is why late-night phone use often leads to poor sleep quality. While blue light filters (like Night Shift on iOS) can help, the most effective solution is simply reducing evening screen time — which is where Minimalist Launcher helps by making your phone less tempting to pick up.