Paper Tank

A fish tank folded from paper

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Ten thousand paper fish in a box of water the size of your phone. Drag to stir them. Tilt to look inside. A shallow box, folded from paper and filled with water, exactly the size of your phone. Inside it, ten thousand small paper fish drift in a real current — they settle, gather, part and swirl the way things do in water — and a paper shark cruises among them. There is nothing to win. Drag a finger and the water follows it, sweeping the papers along and sending ripples across the surface. Tilt the phone and you look into the box: the walls, the floor and the papers shift with real depth. Leave it on the desk and it keeps going, quietly, on its own. PAPERS Four muted looks — Lagoon, Dusk, Sakura and Ink. The whole tank re-colours in a second. ANIMALS The reef shark is yours from the start. The hammerhead, with its wide folded head, and the whale shark, a spotted sheet folded broad and slow, are each a one-time unlock. Tap the shark to open the settings; it is the only button. MADE TO BE LEFT RUNNING No score, no timer, no notifications. Paper Tank collects no data.

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The developer, Jie GU, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

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    Information

    Seller
    Jie GU
    Size
    8.1 MB
    Category
    Casual
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
    Languages
    English and 7 more
    • English, French, German, Japanese, Korean, Simplified Chinese, Spanish, Traditional Chinese
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 Jie Gu
  • Developer Website
  • Privacy Policy