# CIFilter.io — Apply Core Image Filters

> Core Image filter utility for learning, browsing, and applying image effects. (iPhone/iPad app by Noah Gilmore.)

- Source: https://appshunter.io/ios/app/cifilterio/id1457458557 (this page in markdown: same URL + `.md`)
- Developer: [Noah Gilmore](https://appshunter.io/developer/1200706718)
- Category: Utilities
- Price: $4.99
- Rating: 5.00/5 from 6 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 9 MB
- Languages: English
- Released: 2019-03-31
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/cifilterio/id1457458557/reviews.md

## What is CIFilter.io?

CIFilter.io is a full Core Image filter utility. Use CIFilter.io to:

- Learn about CoreImage and available CIFilters
- View documentation for all CIFilters supported on your iOS device
- Browse and search through more than 200 built-in CIFilters
- Apply CIFilters to example images
- Apply CIFilters to your own photos
- Crop, resize, blur and stretch your photos
- Apply stylistic effects to your photos

Your purchase of CIFilter.io supports maintenance and development of the app, the website at https://cifilter.io, and other projects like it.

Questions or feature requests? CIFilter.io is completely open source. Please reach out on GitHub: https://github.com/noahsark769/CIFilter.io

## Key features

- Learn about Core Image filters
- View documentation for CIFilters
- Browse over 200 built-in filters
- Apply filters to example images
- Apply filters to personal photos
- Crop, resize, blur, and stretch photos

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/cifilterio/id1457458557/reviews.md

### 5/5 — Very useful!!!

*2021-02-25*

This saved me more than $5 worth of time, so thank you for making this.

As other reviewers have mentioned, I think what could use some love is the “Try it” screen since it’s a bit unintuitive and depending on the size of the image I provide, I find myself having to pinch and zoom to enter the parameters and then adjusting again to see the results more than I’d like.

### 5/5 — Cool app

*2020-11-12*

This app is the bees knees👍🏿

### 5/5 — Neat idea

*2020-06-18*

Update: Thanks for the quick reply, yet so friendly and informative! Had to come back to give 5 stars, this app is in good hands.

I like the idea of this app. Sadly it doesn’t meet all my needs. So a few suggestions!

Sample images showing what each filter looks like would be great. It’s much too inefficient to tap through each one and select an image and guess at what the inputs should be. I almost never know what filter to use lol so being able to look through them all with the sample images was super useful with the core image filter reference doc.

Can the image preview be built native? The way zoomed out web page makes me sad.

I don’t think CIEdgeWork is working. All the values I try shows a white image.

**Developer response:** Hi there! Thanks so much for the review and feedback, it's really useful! I love the idea of sample images showing each filter.

Sample images are available for many filters on https://cifilter.io, but there's no reason they shouldn't be in the app as well. I've opened https://github.com/noahsark769/cifilter.io/issues/113 to track this work.

The image preview is actually native, but the scroll view UI is so bad that it makes it look like a web page. I have an issue here to track the work of rewriting this view to be more phone-accessible with SwiftUI: https://github.com/noahsark769/cifilter.io/issues/83

And thank you for the report about CIEdgeWork! I'll look into it. I've ticketed it here: https://github.com/noahsark769/cifilter.io/issues/115

Thanks again, and I hope that after these improvements the app will be more usable for your use case. Cheers!

### 5/5 — 🖼

*2019-04-14*

Lovely tool to have! I was definitely confused about the “try it” view being scrollable and zoomable though. It’s pretty hard to tell what’s going on when you first use the app. It’d be nice to see the options fit on a iPhone screen in the next version!

## Frequently asked questions about CIFilter.io

### What is CIFilter.io?

CIFilter.io is a utility app for iOS devices that allows users to explore, learn about, and apply over 200 built-in Core Image filters to their photos. It also provides documentation for these filters.

### How much does CIFilter.io cost?

CIFilter.io is a paid application, priced at $4.99. This purchase supports the ongoing maintenance and development of the app and related projects.

### What devices does CIFilter.io support?

CIFilter.io is compatible with iPhone, iPad, and iPod touch devices running iOS. It is designed to work across these Apple platforms.

### Is CIFilter.io suitable for children?

CIFilter.io has an age rating of 4+, making it appropriate for a wide range of users. It offers creative tools for photo manipulation.

### How often is CIFilter.io updated?

The latest version of CIFilter.io is 2.1.1, which was last updated on December 2, 2020. While updates may not be frequent, the app is functional for its intended purpose.

### Does CIFilter.io have ads?

No, CIFilter.io is completely ad-free. Users can enjoy the full functionality of the app without any advertisements interrupting their experience.

### Can I suggest new features for CIFilter.io?

Yes, CIFilter.io is open source, and the developer welcomes questions and feature requests. You can reach out on GitHub to share your ideas.

### What kind of editing features does CIFilter.io offer besides filters?

In addition to applying Core Image filters, CIFilter.io allows users to crop, resize, blur, and stretch their photos. It also offers various stylistic effects.

## Version history (last 5 releases)

### 2.1.1 — 2020-12-02

Hey everyone! Thanks so much for your continued support of the CIFilter.io project. This small update fixes a critical bug with iOS 14 where the button to return to the filter list would not be shown (caused by an issue with navigation items in UIHostingController).

Also:

- Added support emails to the app for easier reporting of issues
- On compact screens, the filter list now shows automatically on first app launch
- Navigation buttons are now bigger and include the correct padding so they're easier to tap

Thank you so much for supporting the project, and don’t hesitate to reach out via email or Twitter if you have suggestions or issues!

### 2.1.0 — 2020-07-09

Hey everyone! Thanks so much for your continued support of the CIFilter.io project. This is a small update to fix a few outstanding bugs, but I've made a few improvements as well - the filter details page is rewritten completely in SwiftUI, which means not only is it more accessible but the layout has changed to be easier to read and manage.

Also:

- Output images are now shown preserving transparency (checkered background), which makes the outputs of filters like CIEdgeWork much easier to detect and manage
- Filters are now shareable via a navigation bar icon on the filter detail page
- Added a warning to CIKMeans about how it's broken on certain iOS versions
- The filter list page now shows filter descriptions as well as names. I want to eventually extend this to show example images as well, but that will be implemented in a subsequent update
- Fixed an issue where the edit screen would dismiss when you saved an image from the share sheet
- Fixed an issue where output images with transparent backgrounds would get saved with white backgrounds instead

There's so much more I want to do with this project - rewrite the filter application page in SwiftUI (getting rid of the unintuitive scroll view experience), use Siri shortcuts for each filter type, save filter applications as "workflows" which can be applied to arbitrary images, enable filtering live photos and videos etc - but those will have to come in later updates. For now, I hope you enjoy the bug fixes and thank you for your continued support and ratings of CIFilter.io!

### 2.0.0 — 2020-01-17

This version of CIFilter.io includes a TON of fixes and usability improvements! I want to thank everyone who has downloaded and tested the app for all their support. This version drops support for iOS < 13, and as such I was able to remove RxSwift entirely in favor of combine - and some of the new views are written in SwiftUI too! Additionally (with github issue references):

- There is now a slider for adjusting the lightness value of colors for filters which take colors as parameters (#99)
- The default image chooser is new and improved with a slicker design (#100)
- Improved drag and drop interactions, including the ability to drag an output image directly back onto an input image (#98, #94)
- Fixes an issue where the filter detail screen's layout would be incorrect when operating in split view mode (#97)
- Support for multiple CIFilter.io windows on iPad, including the ability to drag input and output images between windows (#96)
- When two windows are open, there's an option to close one of them directly from the list view
- Fixes for two filters whose parameters displayed incorrectly, CIAffineTile and CIMorphologyRectangleMaximum (#85, #93)
- Filter parameters are now sorted alphabetically by name (#36)
- Fix for an issue where the filter search bar would sometimes unnecessarily refresh (#94)
- Added two new built in images which are useful for testing out the transition filters since they're the same size

I'm also planning a release after this one with support for Siri Shortcuts and a revamped filter edit view - until then, please continue to report bugs via the github links which can be found on https://cifilter.io

### 1.1.0 — 2019-10-07

This version of CIFilter.io includes fixes and improvements for issues reported by the community!

- Fixes an issue where text fields for numeric parameters did not show the decimal point key in the iOS keyboard
- Fixes an issue where color hex code input fields did not allow inputting hexidecimal digits
- Fixes an issue where some filters which are available only on newer versions of iOS would render incorrectly
- CIFilter.io now supports dark mode
- CIFilter.io now supports context menu interactions for the list page (jump to apply a filter immediately) and "Try It" page (more easily edit and export generated images)
- A few text styles have been updated to make text easier to read

Thanks again to everyone who has supported this project. You can always keep up to date with the latest status of CIFilter.io at https://cifilter.io and on Twitter @cifilterio

### 1.0 — 2019-03-31

No release notes.

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## More apps by Noah Gilmore

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All apps by Noah Gilmore: https://appshunter.io/developer/1200706718

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*