# GRWalkImager — Random walk algorithm art

> Generates abstract art from photos using random walk algorithms and customizable grids. (iPhone/iPad app by NOBORU IMAI.)

- Source: https://appshunter.io/ios/app/grwalkimager/id1202480949 (this page in markdown: same URL + `.md`)
- Developer: [NOBORU IMAI](https://appshunter.io/developer/896071356)
- Category: Photo & Video, Entertainment
- Price: $1.99 with in-app purchases
- Rating: 3.80/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 45 MB
- Languages: American English, Japanese
- Released: 2017-02-07
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/grwalkimager/id1202480949/reviews.md

## What is GRWalkImager?

Art works with random walk based curves can be converted from your photos.

The curves are drawn which the each line element is connected between regularly arranged grid nodes. 
Following shapes can be selected as the grid type.
・Rectangle
・Diamond*
・Triangle*
・Hexagon*
(* is option)

As the drawing pattern,
・Isotropic:random walk curves
・Contour:curves along the contour of image intensity as much as possible
・Climbing:climbing curves along intensity as much as possible
・Spiral:vortices pattern
are available.
Moreover, changing parameters like length limit, zigzag length, or disturbance, various rich mysterious curves are obtained.

The curves are drawn with the specified color, the colors at the node place on the original image, or the gradation colors depending on the original image intensity.
That time, following node is selected.
・All nodes:each line element of curve is drawn with its node color.
・First node:drawn with the first node color.
・Center node:drawn with the center node color.
or etc.
When "first node" or "center node" is selected,
because shapes on the photo are unexpectedly deformed,
it is finished like a work of avant-garde art.

The created image can be exported as JPEG by default.
PNG, PDF or SVG can be selected when "Pro Quality Extension" is purchased.

Note) Please represent a credit notation or attach #GRWalkImager hash tag to publish your contents with image/data generated by GRWalkImager.

## Key features

- Random walk algorithm art generation
- Multiple grid types (Rectangle, Diamond, Triangle, Hexagon)
- Diverse drawing patterns (Isotropic, Contour, Climbing, Spiral)
- Adjustable curve parameters (length, zigzag, disturbance)
- Color customization based on original image or intensity
- Export as JPEG, PNG, PDF, or SVG (with extension)

## Pricing and in-app purchases

Base price: $1.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Grid Type Extension | $1.99 | one-time |
| Pro Quality Extension | $3.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/grwalkimager/id1202480949/reviews.md

### 5/5 — Hidden Gem

*2020-12-01, version 1.2*

I've a great affection for this app. It has found use in many of my digital artworks over the last year. 

Now, with the addition of video support (what a pleasant surprise), it now stands above the numerous other, similar apps. 

 It is also worth noting the continued development when so many other developers have abandoned their apps after first release - GRW continues to see new features and functions introduced. 

Thank you dev(s)!

### 1/5 — Not a game/maze

*2019-03-04, version 1.1*

I thought this was a puzzle to do. It is not. It is just to make mazes with your own images. There is no start or end either.

**Developer response:** Yes. This is not a puzzle and maze, it's an art generator like maze. If you want a maze, please get MazeImager.

## Frequently asked questions about GRWalkImager

### What kind of art can GRWalkImager create?

GRWalkImager creates abstract art using random walk algorithms. It transforms your photos into unique visual pieces with curves based on grid nodes and drawing patterns.

### What grid types are available in GRWalkImager?

GRWalkImager offers several grid types for art generation, including Rectangle, Diamond, Triangle, and Hexagon. Some of these options are available as in-app purchases.

### Can I customize the drawing patterns in GRWalkImager?

Yes, GRWalkImager provides various drawing patterns such as Isotropic, Contour, Climbing, and Spiral. You can also adjust parameters like length limit and zigzag length for further customization.

### How can I export my creations from GRWalkImager?

By default, GRWalkImager allows you to export your created images as JPEG files. For higher quality formats like PNG, PDF, or SVG, you will need to purchase the 'Pro Quality Extension'.

### What are the color options for the generated art in GRWalkImager?

You can specify colors for the curves in GRWalkImager. Options include using the colors at the node place on the original image, gradation colors based on intensity, or a single specified color.

### What devices is GRWalkImager compatible with?

GRWalkImager is designed for Apple devices and is compatible with iPhone, iPad, and iPod. It requires iOS 10.0 or later.

### How often is GRWalkImager updated?

The latest version of GRWalkImager is 1.2, which was last updated on November 22, 2020. This suggests updates may not be very frequent.

### What is the price of GRWalkImager?

GRWalkImager is a paid application, priced at $1.99. There are no mentions of subscriptions or free versions.

## Version history (last 3 releases)

### 1.2 — 2020-11-22

A video can be converted and outputted as mp4 or GIF format.
Random walk curves growing animation can be created as GIF animation.

### 1.1 — 2017-03-07

・Spiral pattern
・Zigzag length
・Gradation
・Specified Color Mix
・Gradation color composition in a curve

### 1.0 — 2017-02-06

No release notes.

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## More apps by NOBORU IMAI

- [awFEM](https://appshunter.io/ios/app/awfem/id929303572)
- [TeMo](https://appshunter.io/ios/app/temo/id952420245)
- [Fomcal](https://appshunter.io/ios/app/fomcal/id954145664)
- [TriMeshImager](https://appshunter.io/ios/app/trimeshimager/id961385818)
- [MazeImager](https://appshunter.io/ios/app/mazeimager/id983458885)
- [KansuImager](https://appshunter.io/ios/app/kansuimager/id1038267740)

All apps by NOBORU IMAI: https://appshunter.io/developer/896071356

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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 2026-06-10.*