Threadline: Flow Puzzle
Brain Logic Connect & Untangle
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
500 elegant flow puzzles, each with exactly one solution. From 4×4 to 15×15. Daily challenges, smart hints, no time pressure. Free, offline-ready.
Connect, untangle, solve. 500 elegant flow puzzles in your pocket — from breezy 4×4 grids to mind-bending 15×15 challenges. Free to play, no Wi-Fi required.
Threadline is a relaxing brain-training puzzle game where you draw paths to connect matching colored nodes. Lines can't cross. Every level has exactly one solution — find the flow.
► 500 LEVELS, ONE SOLUTION EACH
Every level from Easy through Godlike has been verified by an external SAT solver to have exactly one valid path layout. No guessing, no shortcuts — find the intended solution and the puzzle clicks.
► ELEVEN DIFFICULTY PACKS
From a gentle Tutorial through Easy, Medium, Hard, Expert, Master, Insane, Nightmare, Legendary, Mythic, and Godlike. Each pack ramps up grid size, pair count, and wall density.
► DAILY CHALLENGE + STREAKS
A new puzzle every single day. Build a streak. Compete with friends.
► SMART HINTS WHEN YOU'RE STUCK
Out of ideas? Tap Hint — see one solved path for 5 seconds. Long enough to memorize, short enough to keep the satisfaction yours. Watch a quick ad for a free hint.
► SKIP TOKENS
A level just won't click? Spend a Skip and move on. The next level unlocks — your stars stay honest.
► STAR RATINGS
Every level scores 1–3 stars based on moves and time. Replay to chase 3-star runs across all 500 levels.
► GLOBAL LEADERBOARD
Climb the Threadline ranks. Track total stars, levels completed, and points across the world.
► DARK, FOCUSED VISUALS
A calm dark theme with vivid thread colors. No pop-ups, no clutter, no distractions — just you and the puzzle.
► OFFLINE-READY
The full game works without internet. Play on flights, commutes, or anywhere quiet.
HOW TO PLAY
1. Tap a colored dot and drag to its matching pair.
2. Paths can't cross or overlap.
3. Paths can't grid-touch themselves — no doubling back next to your own line.
4. Use Undo, Hint, or Skip when you need a hand.
DIFFICULTY PACKS
• Tutorial — 5 levels to learn the rules
• Easy — 15 levels, 5×5 grids
• Medium — 30 levels, 6–7 wide
• Hard — 50 levels, more walls and pairs
• Expert, Master, Insane — 60 levels each
• Nightmare, Legendary — for serious puzzlers
• Mythic, Godlike — only the brave finish 500/500
Perfect for fans of flow puzzles, untangle games, daily brain teasers, and zen logic challenges. No timers, no pressure — just satisfying flow.
Free to play with optional in-app purchases for hints, skips, and ad removal. Designed by JK Global Gaming.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Every level Easy through Godlike now has exactly one valid solution — verified at build time by an external SAT solver. A new strict drawing rule (lines can't grid-touch themselves) keeps that guarantee true while you play. Wall density also bumped on the harder packs to make the constraints really bite.
The developer, Joel King, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Purchases
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Joel King
- Size
- 57.7 MB
- Category
- Puzzle
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- 10 Hints $0.99
- 5 Skip Tokens $1.99
- Mythic Pack $19.99
- Godlike Pack $24.99
- Legendary Pack $19.99
- Medium Pack $1.99
- Easy Pack $0.99
- Master Pack $7.99
- Hard Pack $2.99
- Expert Pack $4.99
- Copyright
- © 2026 JK Global Gaming