Vertical Check Camera is a multimedia application developed by Hiroyuki KATOH that provides a convenient solution for checking the alignment of objects. By displaying a virtual vertical grid wall through the iPhone camera, users can easily determine if something is vertical without the need to physically touch the device or the object being checked. This feature sets it apart from other level gauge apps that require physical interaction and limited range.

The app offers the flexibility to rotate the virtual wall for horizontal alignment checks as well. Users can adjust the size of the grid by pinching, capture still images while modifying the grid, and even adjust the focal length for external lens compatibility. Additionally, Vertical Check Camera supports URL scheme integration for seamless use across different apps.