# DitherProg vs Trichromy

The clearest difference is rating: Trichromy at 5.0 against DitherProg's 3.3. Trichromy also leads on review sentiment (80% vs 50%) and update cadence (every 3 weeks vs every 6 months). DitherProg's advantage is in-app purchases (none vs 4). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Trichromy sells 4 one-off in-app purchases. DitherProg asks for nothing beyond the download.

Trichromy holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 4 and 8 respectively. Written reviews point the same way: 50% of DitherProg's written reviews are positive against 80% of Trichromy's.

DitherProg ships an update every 6 months, Trichromy every 3 weeks. The most recent releases landed on June 4, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | DitherProg | Trichromy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (4 ratings)](https://appshunter.io/ios/app/ditherprog/id6444397509/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/trichromy/id6448881187/reviews)** |
| Number of ratings | 4 | **8** |
| Positive reviews | 50.0% of reviews | **80.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 2 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Itoh Tomoaki](https://appshunter.io/developer/871816883) | [Héliographe, Inc](https://appshunter.io/developer/1784071997) |

## What reviewers say

### 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


### Trichromy

[App page](https://appshunter.io/ios/app/trichromy/id6448881187)

Explore trichromatic photography with this unique camera app. Capture stunning color images by layering three monochromatic exposures, offering a distinctive visual style. Experiment with different timings and capture orders for psychedelic or subtle effects.

**Highlights:** Trichromatic photography capture, Layering of 3 monochromatic images, Adjustable delay between exposures, Individual colored shutter controls, Straightforward user interface, Historical photographic process exploration

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $4.99 | one-time |
| Full Unlock | $4.99 | one-time |
| Medium Tip | $9.99 | one-time |
| Large Tip | $19.99 | one-time |


## Frequently asked questions

### Is DitherProg free?

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

### Is Trichromy free?

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

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

Trichromy is rated higher. DitherProg averages 3.3 out of 5 from 4 ratings, while Trichromy averages 5.0 from 8 ratings.

### Do DitherProg or Trichromy have ads?

Neither DitherProg nor Trichromy shows ads.

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

DitherProg ships an update every 6 months, and Trichromy every 3 weeks. Most recently, DitherProg was updated on June 4, 2026 and Trichromy on September 18, 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.*