Day & Night vs Walltone

Day & Night has no write-up on Specifiction yet; its figures are above.

Walltone is a free GPL-3.0 wallpaper and theme manager for Linux. It handles static images, video wallpapers, and animated Wallpaper Engine content, with browsing and downloads from Pexels, Unsplash, Wallhaven, and Wallpaper Engine. Users can assign wallpapers per display, arrange monitor layouts, and adjust scaling. From wallpapers, Walltone generates light and dark Base16 and Material You color schemes; a color picker allows refinements and theme exports for other applications. Tag filters, search, sorting, Boolean filters, and a JavaScript-capable template engine support organization and customization. Video controls include mute and scaling. Wallpaper Engine controls include volume, FPS, audio, parallax, fullscreen pause, and texture clamping. Video or animated wallpapers can be captured as still images for login managers or GRUB. Online sources require API keys, including a Steam Web API key for Wallpaper Engine. Installation is listed through the Arch User Repository, a Nix flake, or source builds. Requirements include Linux, Node.js 18+, and playback and screenshot utilities.