Zero/Sum app icon

Apps Like Zero/Sum for iPhone and iPad

Solve puzzles to uncover the cure

Solve math puzzles to restore equations and uncover a cancer cure. Navigate a comedic story with branching choices. Unlock hidden content by solving equations. Track progress through interactive challenges. Share achievements with friends.

by Sean Kearney★ 4.227 ratingsGamesFreeData updated 2026-09-25
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Showing 561–580 of 1,000 ranked alternatives.

  5. Quiet Christmas app icon

    Quiet Christmas

    Michael Oliphant

    Fix the tree and wake up morning

    Solve puzzles to fix a broken tree and warm a cold house. Interact with a humorous environment and use found items to progress. Navigate a lighthearted setting with retro-style graphics and classic adventure gameplay.

    ★ 4.817 ratingsGames$0.99Data updated 2026-09-08
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  14. Prof. Marvel's Crystal Ball app icon

    Prof. Marvel's Crystal Ball

    Bruce Kalver

    Crystal ball reveals selected poster.

    The app displays a transparent crystal ball on a draped table. Spectators select a poster from a group of magic posters, and the selected poster appears in the crystal ball.

    ★ 3.213 ratingsEntertainmentFreeData updated 2026-10-01
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