Fractview

4.1
337 reviews
50K+
Downloads
Content rating
Everyone
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About this app

Viewer for fractals like the mandelbrot set, lyapunov fractals and complex functions supporting intuitive pinch-to-zoom with many features.

A re-implementation of Fractview called "Fract" is also available on the play store.

* View fractals like the mandelbrot set, julia set, burning ship, newton fractals, lyapunov fractals, phoenix fractals, pendulum simulation and complex functions.
* Zoom/Shear fractals using intuitive pinch-to-zoom gestures
* Set your own functions or transfers
* Pick from a large selection of (re-) combinable samples.
* Modify colors using an intuitive drag-and-drop palette editor (support for two dimensional palettes, using LAB color space).
* Use 3D-mode, branching also for eg the newton fractal.
* Generate images with an arbitrary resolution.
* Save and share your images.
* Share specifications of fractals with others
* Add your favorites and pick up from old ones.
* Uses Renderscript to generate images on GPU (speed-up of at least factor 10 compared to FractViewLite).

The following blog highlights certain topics on the app: https://fractview.wordpress.com/
Check out the following video for a short overview over some of the features: https://youtu.be/M3ZdPJykk9k

The app supports very intuitive gestures like pinch-to-zoom (moving, rotation, scaling and even shearing using up to 3 fingers). The philosophy is similar to Google Maps - moving a finger moves the point below it accordingly.

The app itself contains presets for newton fractals, orbit traps, lyapunov fractals, even pendulum simulations (https://nylander.wordpress.com/2007/10/27/magnetic-pendulum-strange-attractor/), or simply view complex functions using the color wheel coloration. All these presets contain parameters that allow you so easily enter custom functions. There is support for all kinds of functions (from exp to log, from sin to atanh) and even derivates are generated automatically.

There is an intuitive editor for (2-dimensional) color palettes using the LAB-Colorspace. Images can be saved (as pngs) and shared. Furthermore, you can save the fractal description and send it to others to share your work. The app furthermore includes an intuitive bookmark system with the possibility to export your saved favorites.
Updated on
Mar 3, 2018

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4.1
337 reviews
A Google user
November 8, 2018
Upon my quick perspective of this app, render times seem to be good. But the extra colors can throw you off from what you're truly looking at on a real mandelbrot. Not quite sure how to turn off all the extra colors and get the simple lines. But that's because all the settings you can put into it can be a bit overwhelming. I noticed there's a tutorial and I haven't given it a chance yet so that may be a part of why. But as the "consumer" of the product, I would like some simplification as an avid "mandelbrot viewer". Also. If you are new to mandelbrot/ this app I would suggest going to [UI settings] right away because when you zoom you can rotate the object, and personally id rather keep it in place until I find a nice image. But, the fact you can save spots and save pictures for your personal viewing is nice. I haven't zoomed deep enough yet to se just how good the app is; but in conclusion, this is a nice app as long as you can do a really deep zoom. But the rainbow color could also stray you from the actual object itself so you might end up looking at the extra colors in the mandelbrot's black space. Considering, that the black space is the actual math equation and not the lines, but the mandelbrot 'lines' would be more developed with it just being straight black with the outer line. The developer seemed to have put eons of time into this app. But personally I think the default color setting should be the regular black on the inside, because the extra rainbow colors for the default can be somewhat confusing on whether you are just looking at extra colors on the inside of the mandelbrot, rather than the mandelbrot as a "raw" image. Thank you for your time if you read this super long review. I apologize for it being so long. But I feel like it was definitely worth a word on what an "avid mandelbrot viewer" wants for the best of mandelbrot apps. I had this one that was really good but I lost it and I'm trying to find one either just as good or better. And this is the longest review I've ever given for a mandelbrot app, because I see the potential in this one; but again, the settings can be somewhat overwhelming to someone who doesn't understand all the mathematics behind it, or something. Anyway, thanks for giving this a listen if you actually read this far.
8 people found this review helpful
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Searles
November 15, 2018
Hello, thanks for your detailed review. Since you put a lot of thought into this, I am always open to email suggestions. I will reply in more depth soon.
A Google user
April 18, 2019
This app is beautiful, but what I would really like is the ability to select a specific colour palette. Do you know the old app called 'Fractoid' by David Byrne? It has the triangle inequality option, but also several different colour palettes that you could apply to any image. I would love that option here. Edit: right you are. What a detailed colour palette! Any chance of a 'relative colours' setting (like in Fractoid) rather than 'absolute'? That always makes the colours pop a little more.
19 people found this review helpful
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Searles
April 29, 2019
You can edit the color palette. Simply select "bailoutpalette" and change the colors to your likings. You will find detailed instructions in the youtube videos. Thank you for your review :)
A Google user
March 23, 2020
Love it. Renders quickly. Fiddling with presets and parameters is infinite fun! Throws a message "size not changed" when trying to set image size over 2048x2048, tutorial says resolutions like 4000x3000 shouldn't be a problem. Phone is Galaxy S9+ Edit: there was no option to update, but i reinstalled and it works fine now.
5 people found this review helpful
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Searles
March 23, 2020
Hello, thanks for your review. In an early version there was a restriction on the resolution. If you update to the latest version the resolution should be only limited by your phone's memory.

What's new

* Fix crash when sharing images or exporting collections
* Reduce memory consumption in GPU