Photo Extension Histogram provides Tonality, RGB Channels, and Luminosity histograms for photos stored in the Apple Photos app for iPhone and iPad. This extension is great for photographers who need to analyze the tonal and color distribution of photos to identify underexposure, overexposure, and appropriate levels of contrast. The extension also explains, advises, and guides you on how to understand each histogram to be a great photographer!

To use this extension, open the Apple Photos app, select any photo, tap the Action button, and then select the Photo Extension. You can also use the extension when editing photos.

Photo Extension Histogram:
+ Quick and easy to use.
+ Supported in most photo apps Action button.
+ Works on the iPhone and iPad.
+ Available from Action Extension or Edit Extension.
+ Shows Tonality Histogram.
+ Shows RGB Channel Histogram.
+ Shows Luminosity Histogram.
+ Provides advice about dark, light, and mid-tones.
+ Provides advice about high and low contrast.
+ Explains each histogram in plain English for everyone to understand.
+ Save photo with the histogram in the Photo Library.

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What’s New

Version 2.4

We're making Photo Extensions the best extensions for photographers using the Apple Photos app!

+ Updated usage guide for new Apple Photos extensions
+ Complete app rewrite for iOS 14
+ Performance Improvements

Ratings and Reviews

4.4 out of 5
13 Ratings

13 Ratings

JohnBoy5562 ,

The only one in the bundle that I can actually use

This app has some good information and helps you understand the histogram of a photo. The only reason it’s 4 stars is because I bought it in a bundle and the rest of the app are ok but the watermark app will not batch watermark and the resize app will not batch resize, you have to do them one at a time.

Update 5-30-19

I’m not changing my rating from 4 stars. Because it is the best extension/app they have in my opinion. The reason I didn’t give them 5 stars on this extension is because the others in this bundle was a disappointment. But it was my fault for thinking they were app’s. They are not but extension.

Developer Response ,

Thank you for your feedback. We have release a new version for iOS 14. Please get the FREE update. You can contact us for any questions at

Wanni ,

Simple, brilliant and to the point

Good and fast histogram tool. Can be called from share sheet and as extension in edit window.
Highlight clipping and shadow warning would be a nice-to-have feature. Not included yet, and not critical.

dexphotoexp ,

Easy and quick view Histogram in Apple Photos

Got all photo apps from this dev... all are great! This one easy and quick view Histogram info in Apple Photos

App Privacy

The developer, Digiguys, Inc, 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 Collected

The developer does not collect any data from this app.

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


  • Family Sharing

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

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