Bluetooth Battery Watcher is an iOS app that monitors your device's battery level and alerts you when it's time to recharge. This app runs in the background and sends notifications to your phone, so you don't have to worry about constantly checking your battery level. It also comes with a Today widget for quick updates.

Setting up a watcher is a breeze. Just add your device, define when you want to be notified, and tap play. The app is straightforward and even has a 2-minute tutorial to get you started.

You can set up multiple watchers for as many devices as you want. Plus, the app's low battery usage means it won't drain your phone's battery. However, it's important to note that Bluetooth Battery Watcher only supports Bluetooth SMART compatible devices.

Overall, Bluetooth Battery Watcher is a great utility app for those who need to monitor their device's battery level. If you're looking for a simple, easy-to-use app, this one is definitely worth checking out.