Stitch button works. 'Creating panorama' seems to work. but Affinity Photo crashed multiple times when 'Render panorama' was almost done. Jpeg photos have to be opened from iCloud, not Photos. Using iPad Pro 9.7". i paid $21 for this app (non-US App store). It crashes frequently in rendering panoramas. After four tries, I finally succeeded in stitching ten files together to render one panorama photo.