Anaglyph Cardboard is a free Android app that allows you to use your Cardboard-VR headset as anaglyph glasses. The app supports all common 3D-glass types, including Red/Blue, Red/Green, Anachrome, Yellow/Blue (ColorCode 3D), Green/Magenta (Trioscopic), and Magenta/Cyan. It also applies color correction on monochromatic filter types to reduce eye strain without sacrificing quality.

With Anaglyph Cardboard, you can watch your favorite 3D movies or play 3D games without having to buy additional glasses. The app is easy to use, and it works seamlessly with your Cardboard-VR headset. Simply select the 3D-glass type you're using, and the app will do the rest.

Overall, Anaglyph Cardboard is a great app for anyone who wants to enjoy 3D content without having to buy multiple pairs of glasses. It's free, easy to use, and supports all common 3D-glass types. Give it a try today!