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NotanIzer

NotanIzer

by bigpantsgroup LLC

103 ratings
44 reviews
#33 in paid Photo & Video
📊 Productivity
📷 Photo & Video
$1.99

Details

Released
November 11, 2016
Updated
February 26, 2026

Features

Developer

bigpantsgroup LLC
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NotanIzer screenshot #1 for iPhone
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NotanIzer screenshot #4 for iPhone
NotanIzer screenshot #5 for iPhone
NotanIzer screenshot #6 for iPhone
iphone
ipad
📉no. 33
Charts↘︎
📌Ready
Reviews summary↘︎
⭐44
Reviews↘︎
📝2+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦w/o updates
Updates frequency↘︎
🖼️Get Icon
Icons↘︎

About

This app helps artists analyze the light and dark elements in their images. It offers various tools to convert images to black and white, grayscale, or multi-level palettes, allowing for detailed structural analysis and design enhancement. Users can also invert filter displays and share their processed images.

✓Black and white conversion with adjustable threshold
✓Grayscale and color display modes
✓Multi-level color palette generation (3, 4, 10 levels)
✓Adjustable level sliders
✓Slice function to highlight value ranges
✓Invert filter display option
✓Image sharing capabilities
Show original description

What users say about NotanIzer

Reviews of NotanIzer are mostly positive: the Photo & Video app is rated 4.3/5 from 103 App Store ratings. What users like most: easy to use interface, great for analyzing values/lighting. Top complaints: sidebar overlays controls on macOS, images come out white on Mac. Summarized from real user reviews.

Positive things

  • 👍Easy to use interface
  • 💡Great for analyzing values/lighting
  • 🎨Useful for artists/painting
  • 🚀Quick and straightforward
  • ✨Creates interesting images
  • 👍Simple and brilliant tool
  • 💯No microtransactions
  • 🖼️Helps visualize underpainting
  • 🖼️Good for composition analysis
  • 🖼️Simplifies values in photos
  • 🖼️Helps see shapes and contours
  • 🖼️Useful for Lino block artists
  • 🖼️Great for Plein Air painting
  • 🖼️Essential for value studies
  • 💡Converts photos to posterized versions
  • 👍Responsive developer

Negative things

  • 🐛Sidebar overlays controls on macOS
  • 🐛Images come out white on Mac
  • 🐛Cannot save named files to chosen folder
  • 🐛Watermark on prints after paying
  • 🐛Monthly fee and no way to remove app
  • 🐛Limited features
  • 🐛Update issues with export/crashing
  • 🐛Sound effect when levels are too high/low
  • 🐛Free apps can do similar things
  • 🐛App won't open after 30 days
  • 🐛Rudimentary and pointless app
See all reviews

What's New in NotanIzer

3.2

February 26, 2026

Restored cloud syncing between devices UI Updates for OS 26

Charts

Top Paid

📉 33-2

Photo & Video

This app dropped -2 positions in Photo & Video chart.

Last updated on October 16, 2026.

User reviews

Most RecentHighest RatedLowest Rated

Greatest

Amazing tool making my artwork vibrantly clear.
Nanobug68Nanobug68

Great app for converting images to posterized version.

I use this app to convert photographs to a posterized version for using with gel printing.
NorthdixieNorthdixie

Response from developer

I am always surprised by the way people use our apps. Glad it’s working for you!

Yes

i don’t use it to paint (necessarily) i just dig the images it creates. Bravo!
highlikeaflyhighlikeafly

Wessex artist

A useful tool for serious or fun art
ferndownwalkerferndownwalker

Simple and brilliant

I take many art classes and they always recommend this app, so you had to something right.
ArtovitchArtovitch
See 39 more reviews

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User experience

🐞

Reported Bugs

6 issues

Sidebar overlays slider controls and prevents their use on macOS

Bug

Images come out white on Mac

Bug

Watermark on prints after paying

Bug

App won't open after 30 days

Bug

Export images crashes app on iPad

Bug

Export to photos option doesn't appear on iPhone

Bug
✨

Requested Features

6 requests

Allow saving named files to chosen folder

Feature

Disable sound effect for level limits

Feature

Improve photo access to retain position

Feature

Fix macOS sidebar overlay issue

Feature

Fix Mac image export issue (white images)

Feature

Fix update issues with export/crashing on iPad/iPhone

Feature

FAQ

What does NotanIzer do?

NotanIzer is an application designed to help artists analyze the interplay of light and dark elements within their images, a concept known as Nōtan. It provides tools to visualize image structure and enhance details by manipulating color values.

What are the key features of NotanIzer?

Key features include converting images to black and white with an adjustable threshold, displaying images in grayscale or color to focus on structure, creating multi-level color palettes (3, 4, or 10 levels) with adjustable sliders, a 'Slice' function to highlight specific value ranges, and the ability to invert filter displays to reveal hidden details. It also allows for image sharing.

Is NotanIzer free to use?

Yes, based on the provided information, NotanIzer is available for free. There are no mentions of in-app purchases or advertisements, suggesting a completely free user experience.

Who would benefit from using NotanIzer?

Any artist or designer who works with visual composition would benefit from NotanIzer. It is particularly useful for those who want to understand and refine the balance of light and dark elements in their artwork, photography, or digital designs.

How can NotanIzer help with image composition?

By simplifying images into black and white, grayscale, or distinct color levels, NotanIzer allows artists to see the underlying structure and value relationships more clearly. This helps in identifying areas that might be lost in complex imagery and making informed decisions about composition and design.