Cinematical is a free iPhone app developed by REAFO CO. LTD. that allows users to add black bars (letterboxing) and apply filters to their videos. With a simple and intuitive interface, this app makes it easy to give your videos a cinematic touch.

To use Cinematical, all you have to do is follow a few simple steps. First, select the video you want to edit. Then, choose the filter you like from the available options. By default, the app selects the color1 filter. If you prefer, you can also adjust the scale and the horizontal/vertical positions of the black bars to suit your preferences. Once you're satisfied with the changes, simply hit the "Save" button.

Cinematical is a great tool for anyone looking to enhance their videos with a cinematic feel. Whether you're a professional videographer or just a hobbyist, this app provides an easy way to add black bars and apply filters to your videos, giving them a more polished and professional look.