Fast Fractal is an ultra-fast Mandelbrot set explorer.

- Blazing speed allows perfectly fluid exploration with standard pinch and swipe gestures
- Spectacular image quality
- Double-precision floating point math allows 100,000,000,000 times magnification
- Full support for multi-core chips
- Easily set the coordinates and number of iterations
- Easily switch between Mandelbrot and Julia sets

Fast Fractal is made by the developer of tChess (the popular chess app) and Learn Chess (the Apple Staff Favorite e-book).

What’s New

Version 1.0.4

- Updated Fast Fractal to support the screen sizes and screen shapes (notches, etc.) of current iOS devices.

Ratings and Reviews

4.0 out of 5
28 Ratings

28 Ratings

Aditya Sivakumar ,

Very clear fractal imaging but zooming could be slightly better

I overall love this app. I am amazed at how detailed and clear the images of the Mandelbrot set are. I also love how for each point on the Mandelbrot set, the corresponding Julia set can be accessed also simply by a double tap.

However, I do have a suggestion for improvement, relating to zooming. Overall, the zooming feature is very convenient, except that sometimes I want to zoom far inside the Mandelbrot set to one specific spot, but then the zooming hits a “dead end”.

I know that of course that no software can zoom truly indefinitely, but perhaps there can be a “maximum zoom” option in the settings, where one can set the maximum magnification factor by which one can zoom into the Mandelbrot or Julia sets. If the developer could add such an option to the settings, then that would make the exploration of these fractals even more interesting.

Pacati ,

Can zoom in endlessly

The reviewers for the app who are saying you can only zoom in so far before the iterations stop forgot to look in the settings. You can control the number of iterations, the zoom and much more. It just slows down the rendering, as you'd expect.

Also worth noting, for those of us with large tablets, the screenshots are misleading; the app DOES provide landscape view (aka widescreen).

Just Your Usual Reviewer ,

That other guy wasn't kidding about the useless zoom

You can zoom a few times and then it just hits a hard stop and refuses to zoom further or render additional detail. Fractal explorers are fun for hours when you can keep going and going and get into weird edge detail, and this app has neither of those things. It only offers a Mandelbrot set, which despite being my favorite is still only one of the many fun fractal explorations. It's no faster than Fractint was back in the 486 days despite the author's claims above. To add insult to injury it pops up an annoying ad every time you open it. This app was deleted within 2 minutes, as I'd seen all it had to offer, and it wasn't much.


Tom Kerrigan
1.7 MB

Requires iOS 13.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like