Gemdoku: Gem Logic Puzzle
One gem per row & color
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
One gem per row, column and colour - no two touching. Hundreds of levels, a shared daily challenge and a weekly leaderboard.
Gemdoku is a calm, clever logic puzzle. Place exactly one gem in every row, every column and every colour region - and no two gems may touch, not even diagonally. Every level has a single solution you can reach by pure deduction: no guessing, ever.
HOW IT PLAYS
- Tap a tile to mark an X, swipe to mark several, double-tap to place a gem.
- Boards grow from 4x4 to 10x10 as you progress, with a HARD level every 10 levels.
- Hints explain the exact deduction, so you learn the techniques as you go.
- Three lives per level. Lose them all and you can retry any time.
EVERY DAY
- A Daily Challenge shared by every player - see how many you beat.
- A daily streak with a reward chest every 7 days.
- A weekly leaderboard of real players.
MADE FOR SHORT BREAKS
- Levels save mid-way, so you can pick up where you left off.
- Sound, voice and haptics you can turn off.
- No account needed.
Gemdoku is a fresh take on the Queens / Star Battle family of puzzles, built for one-handed play.
Ratings & Reviews
Faster, smoother, and a few small fixes. Keep those streaks going!
The developer, Lunar Apps, 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:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Lunar Apps LLC
- Size
- 135 MB
- Category
- Puzzle
- Compatibility
Requires iOS 15.0 or later and a device with the A12 Bionic chip or later.
- iPhone
Requires iOS 15.0 or later and a device with the A12 Bionic chip or later.
• iPhone XS
• iPhone XS Max
• iPhone XR
• iPhone 11
• iPhone 11 Pro
• iPhone 11 Pro Max
• iPhone SE (2nd generation)
• iPhone 12 mini
• iPhone 12
• iPhone 12 Pro
• iPhone 12 Pro Max
• iPhone 13 Pro
• iPhone 13 Pro Max
• iPhone 13 mini
• iPhone 13
• iPhone SE (3rd generation)
• iPhone 14
• iPhone 14 Plus
• iPhone 14 Pro
• iPhone 14 Pro Max
• iPhone 15
• iPhone 15 Plus
• iPhone 15 Pro
• iPhone 15 Pro Max
• iPhone 16
• iPhone 16 Plus
• iPhone 16 Pro
• iPhone 16 Pro Max
• iPhone 16e
• iPhone 17 Pro
• iPhone 17 Pro Max
• iPhone 17
• iPhone Air
• iPhone 17e
• iPhone 18 Pro
• iPhone 18 Pro Max
• iPhone Duo - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later and a device with the A12 Bionic chip or later.
- iPhone
- Languages
English and 4 more
- English, Japanese, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 Lunar Apps LLC