PipeFlow - Pipe Puzzle

Deterministic seeded generator. 8 difficulty curves, 5x5 to 9x9, 10000 solvable levels. Zero ads, zero IAP, fully offline, native SwiftUI, dark mode ready.

PipeFlow is a native pipe-connection puzzle built with SwiftUI for iOS 16 and later. Lightweight, fluid, and engineered for clarity.

LEVEL ENGINE

• Deterministic xorshift64 seeded generation
• Self-avoiding random walk path builder
• Eight difficulty curves: 5x5 through 9x9
• Adaptive path length from 6 to 78 tiles
• 100% guaranteed solvable on every level
• All 10000 levels reproducible by seed

CORE ALGORITHMS

• 4-bit directional bitmask for pipe connectivity
• Depth-first connectivity check for win detection
• Real-time flow reachability for visual hinting

PERFORMANCE

• Tiny binary, zero third-party dependencies
• Millisecond cold launch via UserDefaults persistence
• Under 50 MB memory footprint
• Clean background / foreground lifecycle

COMPLIANCE AND PRIVACY

• Fully offline, no network requests, ever
• Zero system permissions requested
• No device identifiers, no user data collected
• Apple App Privacy label: Data Not Collected

LOCALIZATION

• English (US) and Simplified Chinese
• Powered by Xcode String Catalog

INTERACTION DETAILS

• Light haptics on every rotation
• Success haptics on level clear
• 0.1-second precision local timer
• Persisted best time per level

SUPPORTED DEVICES

• iPhone 6.1" and 6.7", portrait only
• Minimum OS: iOS 16.0

No sign-up, no network, no payment. Install and play.