Background Eraser - Auto Cut is an iPhone application designed for cutting pictures and making their backgrounds transparent. This versatile app allows users to create stamps for photomontages and collages by removing unwanted elements from their photos.

The app offers multiple modes to suit different editing needs. In "Auto" mode, similar pixels are erased automatically, simplifying the editing process. The "Extract" mode allows users to accurately select and remove specific objects using blue and red markers.

One standout feature is the "Quick Select" tool, which makes it easy to select part of an object and have the algorithm find the boundary for precise editing. The "Hair Brush" tool is perfect for selecting and editing hair or fur with a smooth and natural-looking result.

For more traditional editing, the app also includes a "Regular Brush" tool that can be adjusted in size, hardness, and opacity.

With the ability to add background photos and change the photo's background, Background Eraser - Auto Cut is a valuable tool for creating composite photos and achieving accurate transparency.