I'm an independent developer who built PuffWise, a CDC-guided inhaler training app after struggling with my own technique. It includes a 4-step breathing timer, real-time air quality and pollen alerts, customizable practice reminders, and 7-day weather forecasts that is all in one place. It's completely free to try with a 14-day trial (no card required), and works on iPhone and iPad. I'd love feedback from anyone who uses an inhaler regularly or has tips on what features would help most. Thanks for letting me share!