Plask

Plask (Swedish for "splash") turns your Apple Watch into a tiny aquatic theatre. Pixel-art rubber ducks paddle around while you bathe or swim. On a watch with a depth sensor (Apple Watch Ultra, any generation, or Apple Watch Series 10 and later) the scene reacts to your real depth: ducks dive when you do, with your live depth, max depth and water temperature at the bottom of the screen. The water's temperature shows up in the scene itself. Cold enough and the surface ices over, scarves come out and breath fogs in the air; hot enough and it steams, bubbles and everyone lounges. Ordinary bathing water looks exactly as it always has — the reactions are saved for an ice hole or a hot tub. On watches with a depth sensor, Plask can even open on its own the moment you get in the water. Enable it under Settings > General > Auto-Launch > When Submerged, and the app walks you through the steps. On dry land? Tap "Try a Dive" and drive the water with the Digital Crown from the couch. Every swim is also on the record: Kungliga Badverket, the (fictional) Royal Swedish Bath Authority, issues pixel-art certificates for your aquatic accomplishments — depth, duration, cold water, dawn dips and stranger things. Earn hats for your duck. Browse it all in Arkivet, your trophy room. Certificates sync through iCloud, so a new watch keeps your archive. FREE • Rubber Ducks scene in Classic Yellow • Live depth, max depth and water temperature on supported watches • 45 achievements, a trophy room, and earnable duck hats • Demo mode, watch-face complications and a Smart Stack widget PREMIUM (one-time purchase, no subscription, no nonsense) • 9 extra scenes: Aquarium, Sharks, Octopi, Aliens, Loch Ness, Jellyfish, Castaway, Surströmming and Bioluminescence • Every duck color, even Goth • Depth gauge overlays • Surprise Me: a different scene every dive Works on any watch running watchOS 10 or later. Without a depth sensor the animations still run, they just don't know how deep you are. For fun in shallow water. Plask is not a dive computer.