Rice Fish is an iPhone aquarium app featuring Japanese rice fishes. The app allows you to engage in various operations such as feeding by tapping the water surface and cleaning by swiping the glass surface. Interact with the characters in the aquarium, change the layout by manipulating the weeds' roots, and access the menu by long-tapping for help.

The characters in the app will grow as you perform cleaning and feeding activities daily. With four kinds of characters including Rice Fish, Weed, and Snail, each serving different roles, you can enjoy a dynamic aquarium experience. Additionally, the app automatically saves play data to iCloud every two minutes for seamless gameplay across devices and offers a 3D viewing option through the "Rice Fish VR" app.