Airpods battery app show the battery percentage of your favorite Airpods 1 or 2, airpods pro or airpods pro 2, Airpods Max, beats,..
One of the big plus it get info from the bluetooth only you open it and do not run any services in background what drain the battery, it automatically detect what kind of headphones or airpods you use.
It require location permission because we need this permission android.permission.BLUETOOTH_SCAN and this allow to get bluetooth info.
But the app do not collect or share any info!