Green Screener is a clever little new tool that helps you get perfect green screen recordings. Whenever you find yourself without a light meter or waveform monitor, you can use this tool for fast and convenient checking of the lighting of your chroma key background. It shows you exactly how (un)even your green screen is on your smart phone or tablet. This works much faster than any traditional method with your exposure meter: you immediately see what light corrections are required. This comes in very handy when on location and working with a mobile green screen. $9.99 For iOS/Android.