A free app for Android, by MAR-official.

With the help of this extension, you may use the Bluetooth Delay addon’s Auto Toggle feature.With this function, the audio delay will automatically adjust to the value you specify each time the Bluetooth headphones are connected. You can modify the setting per device connected to it. You can connect it to any device as long as they are compatible.

It’s easy to download and install to your mobile phone. Just download the app using your favorite browser and click install to install it, don’t forget to allow installation of apps from unknown sources. What’s good about this app is it is free of charge.