Mouthbreather

Mouthbreather is a native application for macOS and Windows built to help you build the habit of healthy nasal breathing and break the cycle of chronic mouth breathing for good. Most people don't even realize they're mouth breathing until someone points it out—and by then, the habit is deeply ingrained. Mouthbreather runs quietly in the background, using local AI to detect when you're mouth breathing and sending gentle reminders to correct it in the moment. It tracks your progress over time so you can actually see improvement, and because everything is processed locally on your device, your data never leaves your machine. No cloud uploads, no privacy trade-offs—just a calm, effective tool helping you breathe better every day.