1LINE one-stroke puzzle game 17+

one-stroke puzzle game

Gamincat, Inc.

Designed for iPad

    • Free
    • Offers In-App Purchases



A brain-training puzzle in which you draw 1 line, that will sharpen your wits.
In this free-to-play puzzle game, you merely have to draw one line. It is deceptively simple, yet profoundly deep.
Play through the extensive stages, sharpening your wits as you have fun.

A brain-training puzzle game that activates your mind as you play.
When you've got a spare moment, on your daily commute, or before going to bed, why not experience what it feels like to activate you mind?

How to play:
There is only one rule:
"Connect all the points with just one line."
It doesn't matter where you start.

There are some fiendishly tricky, complicated puzzles among the large number of stages.
When you get stuck, make use of a hint.

There are 15 levels, and a total of 850 stages.
At first, it starts off with simple shapes, but each time your level increases, the number of lines increases, and it gets more and more complicated.
You might think it's too easy early on.
However, clearing the simple stages is also important.
The hints to clearing the later, more complicated stages can all be found scattered through the simple stages.

Some unique types of line, such as "one way lines" and "overlapping lines", can also be found throughout the stages.
These special lines will encourage your imagination.

Use this chance to activate your mind as you play, by trying to solve this free-to-play brain-training puzzle game.
You're sure to get hooked!!

What’s New

Version 3.4.0

Privacy feature update

Ratings and Reviews

4.7 out of 5
30.5K Ratings

30.5K Ratings

lifeandall ,

Where to start and finish, and bridges

Kudos to authors for monetizing some very basic graph theory (the topic here is Eulerian circuits and Eulerian trails). Check how many edges sticks out of each vertex. That’s called the “degree” of a vertex. If all vertices have even degrees, then choose any vertex as both your start and finish. If exactly 2 vertices have odd degrees, then those 2 vertices are your start and finish. In that second case (different start and finish), pay attention to vertices and edges called “bridges”. Those are vertices and edges which *must* be on *any* path from the start to the finish, whether it contains all edges or not, they’re *unavoidable* in getting from here to there. Mentally take away those edges and cut these vertices in half, and you’ll have some “islands” (those are called “blocks”). Make sure you use up every edge of each island before you cross the bridge to the next island. Oh, and double edges (they’re dotted) count twice, etc.

Abear & Bee ,

Don’t waste your money buying “ad free” - there’s still ads...

Really fun addicting game. I was enjoying it so much that I decided to go ahead and buy the paid version of the game to remove the ads. I was really enjoying the game without the little pop ups on the bottom or between levels, but found that once I finished about five levels, an ad would pop up right over the “continue” button to watch a video and get a free hint. I have hit that pop up on accident so many times because of its short delay and being right over the button I’m trying to press that I have gotten very frustrated. When I paid to remove the ads, I wanted them ALL gone. A pop up to view an ad is just as bad as an ad itself, especially when it tricks you into clicking on it. Then you have to navigate back to your level and the meditative state from focusing on the game gets totally ruined. The game is good if you don’t mind ads, but DONT WASTE YOUR MONEY trying to get rid of them. That pop up to watch a video after every few levels will alway still be there. Very disappointing. WOULD NOT PURCHASE AGAIN

Kaylee :-) ,


I love this game sooo much! It’s so addictive! I play it at school, on long road trips, on airplanes, or even just at home when I’m bored. I love it because it gives you hints that you don’t have to pay ACTUAL money for, it’s so awesome!!! It’s also not that hard. If you don’t really like challenging games this is the game for you, but if you like challenging games this is the game for you as well. It’s kind of weird if you think about it. This game is good for ANY type of person. My grandma even plays it and she’s on a higher level than me!!! It’s so fun and I definitely recommend this game. Also, one more thing, even kids as little as 3 yrs old can play this game! My little brother plays this game and just turned 3 yrs old in November! So this game is basically good for 3+. LOVE IT SO MUCH AND I DON'T THINK THIS GAME HAS ANY ISSUES OR BUGS TO BE FIXED!!! GREAT JOB!!! 👏🏻👏🏻

App Privacy

The developer, Gamincat, Inc., 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:

  • Usage Data

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Game Center

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