If you have lost your Polytron AC remote controller, don't worry, Remote for Polytron AC by Pysquare can help you. This Android application allows you to control your Polytron AC with an IR transmitter from your mobile phone. However, it's important to note that not all devices are supported, and your device must have the IR Blaster hardware.

The app is free to use and can be found in the Utilities & Tools category of the Google Play Store. Once installed, the Polytron AC Remote works just like your original remote controller. It's a great solution for those who have lost their remote or simply want to use their mobile phone to control their air conditioner.