How do you lock the touch screen with an app still runing?

We have just released an iOS app (working for both iPad and iPhone) that allows users to disable touch screen inputs all over the screen when viewing any image. The source of image can be from your photo album, camera, or clipboard (image that you copied from any source such as browser or e-mail, etc.).

This was developed to solve the frustrating problem of accidental touch on screen using an intuitive interface which allows freezing/unfreezing with minimum interaction. You will find it much more user friendly that the "Guided Access" feature of iOS if you are interested in freezing the touch for images. For example no password is required or no areas on the screen need to be defined.

Name of the app is "Still Screen" and the link is below. Please let us know if you have any feedback and suggestion to improve the app. Thanks.

https://itunes.apple.com/us/app/stillscreen/id957150954?ls=1&mt=8

<I may receive some form of compensation, financial or otherwise, from my recommendation or link. Edited by Host>

An app which displays an imported image and nullifies screen input. It has no affect on the app within which you wanted to disable screen input, as that app is no longer running. OK...

The original question was "How do you lock the touch screen with an app still running?"

@tonefox: Yes, You are correct. "Still Screen" app works for disabling touch screen when viewing an image. In iOS all apps are isolated from each other and one cannot affect the other. No stand alone app can provide a universal solution for this question. Only the iOS core functionality can provide such feature and so far the only solution is through "Guided Access".