Band-Aid has been updated to version 1.5.6 for Windows Phone 8.1 and version 1.5.8 for Windows 10 Universal.
Here's what's new for Windows Phone 8.1:
Support for Microsoft Band 2 (Sorry this wasn't out sooner)
Fixes for Device errors when trying to add band tile
Here's a new-ish app for Windows 10, Band-Aid!
New look but mostly the same feel. It comes with support for the Microsoft Band 2 and adds a new low phone battery alert feature and fewer ads!
There will be a follow up update to bring the same support and feature to Windows Phone 8.1 very soon,