"What's that flower?" is an educational and reference application available on iPhone that helps users identify various flowers. By selecting flower characteristics like color, habitat, number of petals, and region, users can narrow down their options from over 1000 to a few dozen. The app requires an internet connection to function and offers in-app purchases for features like searching by photo, observations, offline mode, custom filters, and searching in English or Latin names.

Additionally, users who purchase observations can subscribe to preserve photos across devices and share observations with other subscribed users. The subscription automatically renews unless canceled at least 24 hours before the current period ends. "What's that flower?" empowers users with botanical knowledge in an interactive and engaging way.