SOVS camera app is a very niche product. It’s sole purpose is to help you help someone else take portrait photos of you. You enter your own height and pick a portrait setting from the app library. Then the app will help you set the shoot up, so you can hand the phone to anyone to push the trigger. All they have to do is align the shot with a ghost image that you have set up beforehand, and press the shutter button.
1 USD in the App Store. No in-app purchases. Works on iPhone and iPad.