Quadrop

Board

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Five-in-a-row on a 13×13 board — but pieces fall in from all four sides. If no one gets five, whoever has the most four-in-a-rows wins. QUADROP is a deceptively simple strategy game built on two unusual rules. THE GAME On a 13×13 board, players take turns dropping black and white pieces. First to line up FIVE in a row — horizontal, vertical, or diagonal — wins. THE GRAVITY Pieces don't land just anywhere. Each move must be linked to a side of the board by an unbroken line of pieces along its row or column. It's like four-sided gravity pulling stones in from every edge. Openings are constrained, the midgame is sharp, and every move shifts what's reachable next. THE TIEBREAK If the board fills without anyone making five in a row, the winner is whoever has more four-in-a-rows on the board. Equal counts is a true draw. The rule changes everything: even when no five is possible, every position is still being played for. FEATURES · Four AI difficulty tiers — V.Easy, Easy, Medium, Hard · Local two-player on a single device · Per-side stats (your record as Black and as White, kept separate because the game is highly asymmetric) · Pause and resume Computer-vs-Computer games at any time · Configurable AI pacing · Press-and-drag piece placement with live cursor preview · Designed for iPhone, portrait No accounts. No ads. No tracking. No network calls. Just the game.

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

Now with the AI tier — 100 levels of progressively harder play, from a depth-1 heuristic up to a 4-ply alpha-beta minimax. Beat AI MAX N on each side to climb its ladder. Drop down to AI L.X any time to practise against weaker opponents. Per-side stats — As Black and As White are tracked separately because Black's first-mover advantage is real. New Certificate view celebrates your highest level reached. Gold confetti and a LEVEL N slam every time you crack a new frontier.

Version 1.1

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

  • Data Not Collected

    The developer does not collect any data from this app.

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    Information

    Seller
    • Peter Chocian
    Size
    • 3.7 MB
    Category
    • Board
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 Peter Chocian
  • Developer Website
  • Privacy Policy