John’s Background Switcher vs Palace

John’s Background Switcher changes a Windows or Mac desktop background on a schedule, using individual photos or assembled montages and collages. Its image sources include local photos and services such as Flickr, SmugMug, Unsplash, Pixabay, Dropbox, OneDrive, Vladstudio, Immich, and Media RSS feeds, though availability varies by platform. Windows also lists Pexels, Last.fm, and Wallhaven. On Mac, it can manage multiple monitors, showing the same or different images on each, or using a single monitor. Mac switching intervals range from every 10 seconds to 7 days, with grayscale, sepia, and desaturation effects. Windows support starts at Windows 10 and requires Microsoft.NET 4.8; the setup wizard can install that dependency. The maker says settings and authentication tokens are stored locally, photo services are contacted directly, and cached photo results are kept for no more than two days. Windows is free at free. Mac direct costs 7.99 USD once, and Mac App Store costs 8.99 USD once.

Palace is a personal media manager and wallpaper engine for organizing and displaying wallpapers and other media. You can sort items into categories, albums, and favorites, then search by name or tag. Display choices include fill, fit, center, tile, stretch, or spanning multiple monitors, with adjustable background colors and effects. Automatic rotation can run sequentially or in shuffle mode, at intervals from five seconds to several hours, and can target individual displays. Palace supports GIFs, video files such as MP4 and WebM, GLSL shaders, and locally stored images; desktop video wallpapers require MPV. Online sources use public JSON files and must provide direct public media URLs, not private or password-protected files. Local media works offline, and ordinary use does not require an account. Palace says wallpapers, preferences, and settings stay on the device and personal images are not uploaded or accessed. The web hub supports browsing community sources, downloading wallpapers, and submitting source URLs. A Palace lifetime license costs $4 as a one-time purchase; Google Play costs $7.99, paid once for Android only.