NotanIzer 4+

bigpantsgroup LLC

    • $1.99


Nōtan is a Japanese design concept involving the play and placement of light and dark elements next to the other in the composition of art and imagery. The Yin Yang symbol is an example of this design philosophy. The use of Nōtan in art composition is a powerful tool to help the artist identify the structure of the light and dark portions of the image they want to incorporate into their project.

The first function simply divides the image into black and white with colors above the set value being white and those below being black. You can then use the slider to move that line to enhance detail that may otherwise be obscured.

The second and third functions displays the image in either a grayscale or color so the artist can focus on the structure and design of the image.

The last 3 functions are Levels. They set either 3, 4, or up to 10 levels of color spread over black, gray and white pallets. The 3 and 4 levels have sliders to adjust where those levels are while the Levels function just evenly divides the image by the number of levels.

And of course, share your image in many ways.

Any artist will benefit from seeing their work in a different light. NotanIzer is that light.

What’s New

Version 3.01

-Fixed drag and drop of images into the app
-Fixed delete function of projects

Ratings and Reviews

4.0 out of 5
7 Ratings

7 Ratings

Denisipetisi ,

Update issues

I like this app a lot, I use it all the time to adjust the values in my paintings. Since the last update however I have lost the ability to export images. When I try to export the app crashes on my iPad. On my iPhone when I try to export the export to photos option just doesn’t come up.
Please fix. My work around for now is to take a screen shot to save the adjusted image and just crop to the image itself.

Developer Response ,

Thank you for the review! However could you reach out to us using the link in the app (at the bottom of the info page of directions) and let’s see what’s going on.

Splurch42 ,

Easy to use, responsive dev

The UI is straightforward and makes adjusting the color levels very easy. Initially had a problem sharing the image through another app. The developer responded quickly through email and updated the program quickly to fix the issue. Very satisfied overall.

Flayra ,


Simple and eye-opening. The only thing I wish to change would be to disable that terrible sound when you try to set levels too high or low.

App Privacy

The developer, bigpantsgroup LLC, 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 Not Linked to You

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

  • Diagnostics

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


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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