Black wallpaper is an android app that offers a collection of black and white pictures and dark images that can be used as wallpapers or shared with friends through various social media platforms. The app has a clean design and does not require an internet connection to function properly, except for sharing images. Users can easily save the dark pics and set them as their home wallpaper or lock screen background. The app also features full-screen mode and HD black background, AMOLED Wallpapers, among others. However, the app contains ads, which is the only way the developers can earn money from their free app.

The black wallpaper app requires certain permissions to function properly, such as SET_WALLPAPER, which allows the app to set images as wallpaper, WRITE_EXTERNAL_STORAGE, which allows the app to save pics to the user's SD Card, and INTERNET and ACCESS_NETWORK_STATE, which are needed for sharing images. Users should be aware of these permissions before installing the app.

In conclusion, the black wallpaper app is a great option for those looking for black and white pictures and dark images to use as wallpapers. The app is easy to use, has a clean design, and offers various features such as full-screen mode and HD black background. However, users should be aware of the ads and permissions required by the app. Overall, the app provides a good user experience and is worth trying out.