Android: If you have multiple Bluetooth speakers in your house, you need to manually switch to different speakers every time you want to play audio somewhere else. Bluetooth Speaker Switch gives you a handy widget to do it instead.
Bluetooth can be finicky if you have multiple devices that you play through. This app makes it simple by showing you a list of your Bluetooth speakers. Just tap the one that you want and audio will switch to that speaker. It's a simple app for a simple task. You can download the free version which includes ads, or upgrade to the paid version (currently $US1 ($1), normally $US2 ($3)) to get a home screen widget and to remove the ads. For the average person it might be overkill, but if you're constantly switching Bluetooth devices, it might be worth tossing a buck or two towards this widget.
Bluetooth Speaker Switch (Free) [Google Play Store ]
Bluetooth Speaker Switch [Google Play Store]