YahaLive is a free iPhone app developed by Shen-Wen Yang that allows users to create live wallpapers for their devices. With this app, users can set a live wallpaper that combines their desired image with another image they don't want to show, perfect for those who want to have a personal touch on their device without the risk of embarrassment.

The app offers several functions to create live wallpapers. Users can generate live wallpapers from videos, GIFs, or multiple images. Additionally, there is a video trimming feature that allows users to select a specific portion of a video to use as their live wallpaper.

It is important to note that live wallpapers are only available for iPhone 6s and later models. Furthermore, the 3D Touch feature can only be used to move the lock screen, not the home screen. Lastly, live wallpapers created with YahaLive do not have sound.

To share the live photos generated with YahaLive, users can utilize the "AirDrop" or "Message App" features on their iPhone.

Overall, YahaLive is a user-friendly app that provides a simple and accessible way to create personalized live wallpapers for iPhone users.