# OneLine: Dot Connect — Euler Path Brain Teaser

> Euler Path Brain Teaser (iPhone/iPad app by Catherine Josephine.)

- Source: https://appshunter.io/ios/app/oneline-dot-connect/id6763739785 (this page in markdown: same URL + `.md`)
- Developer: [Catherine Josephine](https://appshunter.io/developer/1894616938)
- Category: Games, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 12 MB
- Languages: Chinese (Simplified, China)
- Released: 2026-04-27
- Data updated: 2026-10-07

## What is OneLine?

Welcome to OneLine: Dot Connect — the elegant Euler path brain teaser that challenges your logic and spatial reasoning.

     【How to Play】

     Draw a single continuous line through every dot on the grid without lifting your finger or revisiting any dot. Simple to learn, deeply
     satisfying to master.

     【Game Features】

     ■ 50 Handcrafted Puzzles
     Four chapters of increasing difficulty, from simple 3×3 grids to complex 8×8 challenges. Each level is a unique brain teaser designed to
     make you think.

     ■ Two Play Modes
     • Quick Play — jump right in with a random puzzle
     • Level Select — choose your challenge and track progress

     ■ Star Rating System
     Earn up to 3 stars per level based on performance. Complete all 50 puzzles with perfect ratings to prove your mastery.

     ■ Smart Hint System
     Stuck? Use hints to guide your thinking without giving away the solution. Hints highlight the next logical step.

     ■ Full Undo Support
     Made a wrong turn? Undo any move at any time. Restart puzzles freely — no penalties, no pressure.

     ■ Intuitive Touch Controls
     Smooth touch-drag controls optimized for iPhone. Draw your line naturally with a single finger.

     【About Euler Path】

     The Euler path problem traces back to mathematician Leonhard Euler and the famous Seven Bridges of Königsberg. Your goal: find a path
     through every node exactly once. A classic problem that has fascinated minds for nearly 300 years.

     【Privacy Commitment】

     Fully offline. No personal data collected, no ads, no in-app purchases, no internet required. Download and play immediately — no account
     needed.

     Start your OneLine journey today!

## Is OneLine safe?

Not enough ratings yet to assess OneLine.

## Is OneLine legit?

OneLine: Dot Connect has limited verification signals. The AppsHunter Legitimacy Score for OneLine is 55 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-04-27

No release notes.

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## More apps by Catherine Josephine

- [Cat Box Carnival](https://appshunter.io/ios/app/cat-box-carnival/id6762831097)
- [BlockMaster Puzzlearcade](https://appshunter.io/ios/app/blockmaster-puzzlearcade/id6763007962)
- [AxiomGrid: Sudoku Puzzle](https://appshunter.io/ios/app/axiomgrid-sudoku-puzzle/id6763726874)

All apps by Catherine Josephine: https://appshunter.io/developer/1894616938

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*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 2026-10-07.*