Converting a panorama pic taken with my mobile phone to a 360 image

 Just learnt that: 

1. I can convert a pano(rama) pic I've taken with my mobile phone to a 360 image using the Thinglink link: https://www.thinglink.com/pano-to-360

2. When viewed using a 360 image viewer app (such as Ricoh Theta), I can view the panorama pic in a full circle. But then of course because the original pic was not taken with a 360 camera, the top and bottom parts of this 360 image will be just blurred shades.