For US$1.99, the Night Vision Camcorder app does exactly what it says on the label. It enhances sensors so you can better see and record low-light sources.
The marketing for this app, which was developed in Russia, is frankly appalling. It shows numerous young "hotties" in a low-light club atmosphere. Cynicism and misogyny drip from the app screen shots.
Feel free to ignore the skeezy marketing.
For two bucks, what you get is actually a really cool and useful tool that you can use for finding items that have dropped to the floor under your desk or for capturing video and photos without deploying a flash.
The app offers numerous features, including a user-guided amplifier, front and rear camera pickers, LED flash control, zoom and more, making this a solid value -- despite the creep-out.