Beamdoku

Pure logic. Beams never cross.

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

One lighthouse per zone. Never two in the same row or column, never touching. Pure logic, never a guess — and no ads, ever. One lighthouse per zone. Never two in the same row or column, and never touching. That's the whole rule — and every grid is solvable by pure logic, never by guessing. Place a lighthouse and its beam lights up the row and the column. Two beams cross? Everything turns red until you fix it. Solve the grid and the whole coast lights up. FEATURES • 60 hand-verified levels that grow from 4×4 to 8×8, then 176 more grids for experts • A daily puzzle, the same for everyone, every day • Name the port: each level reveals a letter of a famous US lighthouse harbor — Boston, Nantucket, Key West… Guess it to bank extra hints • Hints that never spoil: they only remove a wrong lighthouse or reveal one missing • Long-press to mark a square you've ruled out • Haptic feedback, a soft pentatonic soundtrack you can mute, and a reminder for tomorrow's daily puzzle if you want one • Works fully offline. No account. No ads, ever. Unique solution guaranteed on every grid.

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The developer, Ahmed RIDA ALI, 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 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
Ahmed RIDA ALI
Size
9 MB
Category
Puzzle
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 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+
Copyright
© 2026 Beamdoku
  • Developer Website
  • Privacy Policy