Flue: Pipe Puzzle Game
Connect colors, no crossing
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
New Insane modes with portals and bridges. Daily Challenge, Zen and Time Attack. Hundreds of levels tuned to actually challenge you!
Flue is a pipe-connecting puzzle: link every pair of colors and fill the whole board without crossing a single line. Easy to learn, impossible to put down.
GAME MODES
• Zen — play at your own pace, no pressure, difficulty grows naturally.
• Time Attack — beat the clock and manage your lives carefully.
• Daily Challenge — a brand new puzzle every day, with streaks and weekly bonuses.
• Insane — the ultimate test: walls, bridges and portals combined, star-rated by each level's real solving difficulty.
FOUR DIFFICULTY TIERS
From Easy to Expert, hundreds of boards individually calibrated so the challenge actually grows — not just bigger grids, but genuinely harder puzzles.
PLAY YOUR WAY
Earn coins by solving levels and spend them on hints, auto-solve or skipping a level when you need to. No pressure, no forced ads.
• Available in English, Spanish, French and Portuguese
• Dark, minimalist design that's easy on the eyes
• Progress saves automatically
The developer, ILU LLC, 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
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ILU LLC
- Size
- 43.4 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.
- iPhone
- Languages
English and 3 more
- English, French, Portuguese, Spanish
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- 1000 Coins $6.99
- 300 coins $2.99
- 100 Coins $0.99
- Copyright
- © 2026 ILU LLC
