PCB Gerber Viewer is a free Android application developed by Dangomushi-Oji that allows you to view multilayer PCB board layouts. The program supports Gerber file format, which is commonly used in the PCB industry. With this viewer, you can open multiple Gerber files with the extension "gbr" and view them in a single interface.

The interface of the application is user-friendly and easy to navigate. You can bring a particular layer to the front or make it invisible. The best part is that there are no restrictions on file size, which means you can view any PCB layout regardless of its size. PCB Gerber Viewer is an excellent tool for PCB designers, engineers, and hobbyists who need to view and analyze PCB layouts on the go.