# Atkinson vs DitherProg

The clearest difference is in-app purchases: DitherProg at none against Atkinson's 2. DitherProg also leads on ads (none vs shown). Atkinson's advantage is update cadence (monthly vs every 6 months) and review sentiment (71% vs 50%). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Atkinson sells 2 in-app purchases, starting at $0.99 per month. DitherProg asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.3 for Atkinson against 3.3 for DitherProg. Both are backed by a comparable volume of ratings — 6 and 4 respectively. Written reviews are what separate them: 71% of Atkinson's written reviews are positive against 50% of DitherProg's.

Atkinson ships an update monthly, DitherProg every 6 months. The most recent releases landed on June 5, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | Atkinson | DitherProg |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (6 ratings)](https://appshunter.io/ios/app/atkinson/id1569487124/reviews)** | [3.3 (4 ratings)](https://appshunter.io/ios/app/ditherprog/id6444397509/reviews) |
| Number of ratings | **6** | 4 |
| Positive reviews | **71.4% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 1 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tsutomu Koyachi](https://appshunter.io/developer/413497532) | [Itoh Tomoaki](https://appshunter.io/developer/871816883) |

## What reviewers say

### Atkinson

[App page](https://appshunter.io/ios/app/atkinson/id1569487124)

This app processes photos using the Atkinson dithering algorithm, originally used for black and white displays on old Macintosh computers. It creates small file-sized images with options for square cropping, rounded corners, and white borders, offering a real-time preview of the effect.

**Highlights:** Atkinson dithering algorithm processing, Square photo output, Toggleable rounded corners, White border option, Real-time preview

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard Month | $0.99 | per month |
| Standard Year | $9.99 | per year |


### DitherProg

[App page](https://appshunter.io/ios/app/ditherprog/id6444397509)

This application allows users to apply nostalgic dithering effects to images. It offers various tone depths and dithering algorithms, including Bayer, Halftone, Spiral, Floyd-Steinberg, and Jarvis, Judice & Ninke. Processed images can be saved in PNG format.

**Highlights:** Nostalgic dithering effects, Multiple tone depths, Various dithering algorithms (Bayer, Floyd-Steinberg, etc.), Save as PNG

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Atkinson free?

Atkinson is free to download, with in-app purchases available.

### Is DitherProg free?

DitherProg is free to download, with no in-app purchases.

### Which has better reviews, Atkinson or DitherProg?

Atkinson is rated higher. Atkinson averages 3.3 out of 5 from 6 ratings, while DitherProg averages 3.3 from 4 ratings.

### Do Atkinson or DitherProg have ads?

Atkinson shows ads; DitherProg does not.

### Which is updated more often, Atkinson or DitherProg?

Atkinson ships an update monthly, and DitherProg every 6 months. Most recently, Atkinson was updated on June 5, 2026 and DitherProg on June 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*