You may download the SwiftPaws app to multiple phones but you can't pair multiple phones at the same time. Chase will pair with the first, strongest signal it detects which may not be the app you're looking at. Be sure to swipe up to completely close all other SwiftPaws apps on all other devices present.
If you also have the optional universal remote be sure that it is turned completely off. And if you're using the remote be sure that all SwiftPaws apps are completely closed by swiping up.
Keep the SwiftPaws controller app within 10 feet of the drive to maintain connection.
When you plug the drive into the wall outlet the blue light on the bottom of the device will bling once per second.
When you open the app and it pairs with the drive, the blue light will blink more slowly - only once every three seconds.