Monkey Flash: Focus on one window. Dim everything else.

Monkey Flash helps you stay focused by dimming everything except your active window. Unlike complex productivity apps, Monkey Flash does one thing well—instantly highlight the window you're working on. Perfect for developers, writers, designers, and anyone who wants a distraction-free workspace. • Native macOS app • Lightweight • One-time purchase • No subscription

I’m Jeff, an indie developer from South Korea. Monkey Flash is my first commercial macOS app, and I’m really excited to finally share it with you. I built it because I wanted a simpler way to stay focused while working. Existing focus apps often felt too feature-heavy or too expensive, so I created something lightweight that does one thing really well: dim everything except the active window. Monkey Flash is designed to feel native to macOS, stay out of your way, and help you focus with a single shortcut. This is just the beginning. I’m already working on new features, and I’d genuinely love to hear your feedback, suggestions, or feature requests. Thanks so much for checking it out—I hope you enjoy using it! 🙌

honestly the dimming effect kicks in instantly which is kind of nice, no fiddling with settings. been using it while writing and it's basically doing what f.lux tried to do for focus