DarkLens is an Android app developed by Yohan Cassaigne that helps users see in low-light conditions by applying real-time filters to their device's camera. The app increases the exposure of images captured by the camera, making the scene brighter, and applies color gradients to enhance visibility. It's important to note that DarkLens requires some ambient light to function properly and cannot be used in completely dark environments.

In DarkLens, users have the option to choose from a variety of color filters to enhance their viewing experience. The app also allows users to adjust the exposure level to make the scene brighter or darker according to their preferences. Additionally, users can change the aspect ratio, zoom in or out, and capture photos.

DarkLens includes advertisements and offers an in-app purchase called Pro, which provides access to advanced features such as ad removal, video recording, selfie mode, and additional filters.

It's essential to mention that DarkLens is not a true night vision camera or thermal camera. Instead, it utilizes filters and exposure adjustments to improve visibility in low-light conditions.