Gridsum

Logic puzzles. Pure math.

Only for iPhone

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

iPhone

Every region has a target sum. Swap tiles until every region matches at once. That is Gridsum — a number puzzle built on pure logic. No timer. No lives. No luck. The board is fully knowable and every solution is reachable through arithmetic and planning alone. HOW IT WORKS The grid is divided into colored regions. Each region contains numbered tiles and a target sum. Swap any two tiles and watch the totals shift in real time. Find the arrangement where every region simultaneously hits its target — puzzle solved. Gridsum starts with a simple 2×2 grid and two regions. As difficulty climbs, the challenge deepens: 3×3 and 4×4 grids, irregular region shapes, and tiles that belong to two regions at once — where a single swap changes two totals simultaneously. Every puzzle is solvable through logic. No guessing required. HUNDREDS OF HANDCRAFTED LEVELS Work through the difficulty tiers: Tutorial, Beginner, Apprentice, Intermediate, Advanced, Expert, Veteran, and Pro, Master, and Grandmaster. Each level is rated by move count. Solve within the target — no hints, no resets — to earn a PERFECT badge alongside your stars. Every level tracks your personal best time and move count. See exactly how much you've improved. DAILY CHALLENGE A new arithmetic puzzle drops every day, seeded by the date. Your streak counts any day you play at least one level — the daily challenge or any regular level. Your current streak and best streak are always visible on the home screen. GLOBAL LEADERBOARD Compete with players worldwide across four ranked categories: total stars earned, solving speed, perfect solves, and highest level reached. Set a display name and see exactly where you stand. BUILT FOR FOCUS Dark background. Glowing neon region borders. Clean geometric typography. Gridsum is designed for players who want a clean, distraction-free logic puzzle — no characters, no story, no countdown pressure. Just numbers and logic. Accessibility options: colorblind mode with pattern fills on region borders, reduce motion, and large text. Free to play with ads. A one-time purchase permanently removes all ads — no subscription, no recurring charge. If you enjoy sudoku, KenKen, Wordle, or number puzzles generally, Gridsum gives you something more spatial and strategic to work through. Download for free and start your first streak today.

Ratings & Reviews

  • 5.0
    out of 5
    3 Ratings

UI updates, colorblind mode fix, Gamecenter syncing.

Version 1.1.1

The developer, Tyler Lewis, 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 Linked to You

    The following data may be collected and linked to your identity:

    • Purchases

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Tyler Lewis
Size
  • 66.6 MB
Category
  • Puzzle
Compatibility
Requires iOS 15.1 or later.
  • iPhone
    Requires iOS 15.1 or later.
  • iPod touch
    Requires iOS 15.1 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 Tyler Lewis
  • Developer Website
  • Privacy Policy

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