Here is a smart laundry sensor that lets you know when your dryer is done drying your clothes. SmartDry sends alerts when your dryer has stopped. It lets you check in on the status of your clothes on your smartphone or with Alexa. The sensor is compatible with any electric or gas dryer.
SmartDry easily snaps inside any clothes dryer. Since it is cloud connected, it has no range limit. You can connect to it from your iOS or Android device. Costs under $50 at this time.