Do not spend money on this.

I had used a previous version of this app long before iPhones offered to shoot panos using the Camera app. I had some new photos that I wanted to stitch and spent $2 on this new version. The interface is not optimized for the 6S+ and does not offer a way to obtain photos from the Camera Roll. Any pictures must be added to an album in Photos and then navigated to in the app (which is partly miserable due to Apples album organization). Once I finally got the photos selected, the app put way too much perspective in the stitching so the final product looks way off. This was a big disappointment.

Tjo_4 about Auto Stitch Pic-Merge Panorama, v1.6