Some Bluetooth devices will only pair in app. The popular Square readers are an example. There are commercial products that way. In addition to Square readers, we (my work) have devices for order picking and retail technology that work that way.
This is blessing and curse. It can ease device management and control tampering. People who don't follow directions or posses middle school reading skills will think items are broken. Some more get weird ideas on the privacy topic.
By coincidence, I just sent software updates to a bunch of iPads and iPhones to see if that's why the past week or so has had some issues with these sorts of devices but I suspect human behavior is root cause.
__________________
ƃuoɹʍ llɐ ʇno əɯɐɔ ʇɐɥʇ
|