Tempo turns your Mac wallpaper into a live weather display. Rain drops, snow flakes, fog, clouds, sun movement, stars — all computed from MET Norway weather data in real-time. Menu bar app, macOS 14+. Free: live weather. Pro ($9.99): simulated weather (Christmas snow, rain anytime), screen saver mode, fine tuning. GPU-accelerated. Apple Silicon native. One-time purchase.
