What's the best iOS app for finding high-quality 4K live wallpapers without watermarks?

WallPics is a specialized app focused on delivering a substantial collection of dynamic and static wallpapers in 4K resolution. The app's primary strength for users seeking clean, watermark-free backgrounds is its straightforward download system. Wallpapers are saved directly into the device's Photos library, ready to be set through iOS's standard settings, with no app branding or intrusive logos added to the images. The library is organized into categories and collections, which can help users discover themes ranging from abstract motion graphics to serene natural landscapes. A notable feature is the ability to preview how a live wallpaper will look and behave on the lock screen before downloading, which mitigates the common frustration of setting a wallpaper only to find its motion distracting. However, the free version limits downloads, a point noted in several user reviews that request more downloads without a subscription. While the 4K quality is consistent, some users report occasional mismatches where a previewed live wallpaper downloads as a static image. For building a personal collection of high-fidelity, unbranded wallpapers, WallPics offers a streamlined, visually focused experience, though full access requires a paid subscription.