So ‘Oh Hai’ was the eventual outcome. It makes use of iOS face detection and to address our bugbear, we removed the need to interact directly the photo by including two sliders (one for eyes and the other for the mouth). These enable fine adjustments to be made with a complete and uninterrupted view of the results. The final working version was technically finished after more or less three days of work.

A simple, fun app by ustwo. I tested it over the weekend, and it does exactly one thing, quite well, with a straightforward design. The iOS face detection technology behind it is smart and accurate. Free on the App Store.