Light Route: One Line Puzzle
Fill every cell in one stroke
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Light Route is a one-line path puzzle that grows with you. Start from the glowing node, pass each numbered checkpoint in order, fill every open cell, and reach the exit.
• 300 progressively generated levels from 4×4 to 8×8
• Blocked cells and ordered checkpoints steadily raise the challenge
• Trace backward along your route whenever you take a wrong turn
• Early puzzles allow multiple routes; the final 20 have a verified unique solution
• Use hints when stuck, with optional rewarded ads for more hints
• Free players may see one interstitial only after every five completed levels
• A one-time purchase permanently removes interstitial ads
No account is required. Progress and settings are stored on your device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Cheng Yu Chiang, 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:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Cheng Yu Chiang
- Size
- 6 MB
- Category
- Puzzle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Traditional Chinese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Remove Interstitial Ads $1.99
- Copyright
- © 2026 Charonyuu