San Diego Zoo: Offers an app. Is more focused on maps and getting around the zoo. Had to go directly to website and navigate learning more about a specific animal.
Animals sorted by category (mammals, etc), no videos, colorful, has information. Positive experience.
Zoos in Antarctica: Zoo contains a list of what zoos around the world to see penguins. Helpful resource but stops there.
Oregon Zoo: Navigated to website, no app. Animals sorted by alphabetical name (pet name they were given. Minimal text.
Monterey Aquarium: Has videos/live/pre recorded.