Does what it says, but a bit shaky.

This app is great if your hands tend to move a bit while filming. On an iPhone 5, however, fast motion can cause an odd vibrating shakiness in the recording.

So long as you dont plan on dramatic movements, it should be okay.

Very intuitive, and a pleasure to use. I have some friends who struggle with Vertical Video Syndrome.

This is made for them.

Omar Khafagy about Horizon Camera, v1.0