# Threadline: Flow Puzzle — Brain Logic Connect & Untangle > Brain Logic Connect & Untangle (iPhone/iPad app by Joel King.) - Source: https://appshunter.io/ios/app/threadline-flow-puzzle/id6758916144 (this page in markdown: same URL + `.md`) - Developer: [Joel King](https://appshunter.io/developer/1875494842) - Category: Games, Entertainment, Puzzle, Trivia - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 13.0 · 55 MB - Languages: American English - Released: 2026-03-03 - Data updated: 2026-07-03 - User reviews in markdown: https://appshunter.io/ios/app/threadline-flow-puzzle/id6758916144/reviews.md ## What is Threadline? 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. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Expert Pack | $4.99 | one-time | | Hard Pack | $2.99 | one-time | | Master Pack | $7.99 | one-time | | Easy Pack | $0.99 | one-time | | Medium Pack | $1.99 | one-time | | Legendary Pack | $19.99 | one-time | | Godlike Pack | $24.99 | one-time | | Mythic Pack | $19.99 | one-time | | 5 Skip Tokens | $1.99 | one-time | | 10 Hints | $0.99 | one-time | ## Version history (last 4 releases) ### 1.4.0 — 2026-05-05 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. ### 1.3.1 — 2026-05-04 Threadline 1.3.0 — Difficulty Rework The biggest update yet. We rebuilt the puzzle generator from the ground up. ► HARDCORE MODE (default from Easy onwards) Lines commit when you lift your finger. Plan your moves — there's no tap-to-redraw. Tutorial stays casual so new players can learn. ► WALLS in higher tiers Strategic blocked cells force tighter routing. Insane through Godlike now feel genuinely hard. ► REWORKED UNDO ECONOMY 1 undo per ad watch (was 3). 5 free undos per day. Or buy 10 for $0.99. Undos are now meaningful. ► STILL THERE 500 levels across 11 packs. Daily Challenge with streaks. Hints. Skip Tokens. Global Leaderboard. Top-tier puzzles now require real planning instead of trial-and-error redraws. ### 1.1 — 2026-03-19 Version 1.1.0: • 200 NEW levels added (now 500 total!) • 3 NEW difficulty packs: Legendary, Mythic & Godlike • Stats screen with total points tracking • Enhanced tutorial • Performance improvements ### 1.0 — 2026-03-04 No release notes. ## More apps by Joel King - [LexiconPuzzle](https://appshunter.io/ios/app/lexiconpuzzle/id6758881314) - [Echogrid](https://appshunter.io/ios/app/echogrid/id6758916236) - [GardenForge AI](https://appshunter.io/ios/app/gardenforge-ai/id6758949063) All apps by Joel King: https://appshunter.io/developer/1875494842 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-03.*