Byul: Star Logic

매일 풀어보는 우주 별 퍼즐

Only for iPhone

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

iPhone

Brain-twisting daily logic puzzles. Place stars, follow three simple rules, beat the clock. No subscription, just a one-time purchase to remove ads forever. A daily brain puzzle where you place stars in a starry night sky. One puzzle per day, the same for everyone in the world. ▣ THE RULES (3 lines, infinite depth) A modern take on Star Battle, also known as "Two Not Touch": • Place K stars in each row • Place K stars in each column • Place K stars in each bold-bordered region • Stars cannot touch — not horizontally, vertically, or diagonally That's it. Three rules. But the deduction chains run deep. ▣ MODES • Daily Challenge — A new 10×10 Expert puzzle at midnight UTC. Everyone in the world solves the same one. Build your streak. • Custom Play — Pick your size (5×5 to 10×10) and difficulty (Easy → Master). Five tiers of brain-bending. • Resume Anywhere — Your in-progress game auto-saves. Pick up where you left off. ▣ NO AD HARASSMENT • Daily Challenge is always ad-free • Get a hint by watching one short ad — that's it • Remove ads forever with a single one-time purchase • No subscriptions, no upsells, no "premium tier" ▣ THIS IS FOR YOU IF • You've solved Killer Sudoku Expert and want the next step • You love NYT Games' "Two Not Touch" puzzles • You miss the long deduction chains of Nikoli-style puzzles • You want a focused 5 to 30 minutes a day for your brain ▣ TOOLS THAT RESPECT YOUR TIME • Three input modes — Star, X-mark, Eraser — never more than one tap to switch • Drag in X mode to paint multiple cells in one motion • Unlimited Undo / Redo • Instant red highlight when a placement violates the rules • Hint system reveals one correct star at a time (via short reward ad) ▣ TRACK YOUR PROGRESS • Solving time and total completions • Best time per grid size • Current streak and longest streak • Compare your record against the global average ▣ MADE IN KOREA Independent puzzle studio. Built for people who actually solve hard puzzles, not "casual brain games.

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The developer, Jaehyeok Lee, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Linked to You

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

    • Identifiers

  • Data Not Linked to You

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

    • 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
  • Jaehyeok Lee
Size
  • 12.7 MB
Category
  • Puzzle
Compatibility
Requires iOS 26.5 or later.
  • iPhone
    Requires iOS 26.5 or later.
  • Mac
    Requires macOS 26.5 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 26.5 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 Byul Studio
  • Developer Website
  • Privacy Policy

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