> It would be nice if Android and iOS provided a convenient way to activate Bluetooth temporarily, only when needed. I can't speak about iOS, but if you're wil

> It would be nice if Android and iOS provided a convenient way to activate Bluetooth temporarily, only when needed. I can't speak about iOS, but if you're willing to do a little tweaking there are multiple ways to do this on Android devices. The simplest is probably with "Llama - Location Profiles" though it's no longer actively developed. Disable or edit the default profiles that shift your phone to quiet, etc. and create your own that toggle wifi, Bluetooth, etc based on events or on a widget you create. The Bluetooth toggle action lets you specify on/off/on for X minutes, etc. The only issue I might see there is if a fitness tracker is seen as a connected device as far as Android is concerned. I'll note that mine does not show up on the list of devices. The more maintained option would be doing something similar with Tasker, but I haven't tried it. Tasker can be triggered by NFC using something like "NFC ReTag Pro", and Llama can have a trigger based on an NFC tag as well.