Hi, unfortunately the picture in the app cannot be rotated. Or I haven't figured it out yet.

I also think it's a shame that the BC2 only has a magnet on the underside. But if I understand you correctly, you want to rotate the photo or video taken by the BC2 upside down by 180 degrees on the iPhone in the photo app. This is already possible. The following steps are required:
1. open the photo/video in the photo app
2. click on Edit at the top right
3. click on Crop at the bottom
4. then click on the square with the anti-clockwise arrow at the top left, then the image/video rotates 90 degrees each time
5. when finished, click on the tick at the top right and save.

Kurt's alternative below is of course also possible.

i have the same problem, the picture can't be rotated. but i can live with it

I use the Kanera on the wall. One solution would be to stick a magnet on the opposite side of the camera. You can buy them at Jumbo ect.