Field Codex

You walk, you sleep, you train — and animals show up. Not as numbers on a chart, but as cards you actually keep. Hit ten thousand steps and a snow leopard turns up in your collection. Sleep a full night and something nocturnal appears. Finish a workout and a wolf or an eagle is waiting to be claimed. Field Codex reads your activity from Apple Health and turns the things you already do into a collection of real wildlife. Every card is an actual animal — its real name, its conservation status, and facts that happen to be true. Some are common. A few are rare enough that the card glows and shifts when it flips over. The rarer the moment, the better it looks. The more you learn about a species, the stronger its card gets. Take a short quiz about it, level it up, and at some point it changes form. Pair two animals that share a real bond in nature — a predator and its prey, two creatures of the deep — and you unlock a combination that explains why the two belong together. There are sets to finish, a daily streak to keep going, and a field log that quietly keeps track of everything you've found. No ads. No subscriptions. No purchases of any kind. The app works offline and your collection stays on your device. Somewhere out there is an animal you haven't met yet. Go for a walk.