# DU vs rhodopsin

The clearest difference is price: DU at Free against rhodopsin's $9.99. rhodopsin's advantage is in-app purchases (none vs 1) and rating (5.0 vs 4.5). On ratings volume, update cadence, ads and device support there is nothing between them.

DU is free to download; rhodopsin costs $9.99 up front. DU sells 1 one-off in-app purchase. rhodopsin asks for nothing beyond the download.

rhodopsin holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 33 and 25 respectively. Written reviews point the same way: 71% of DU's written reviews are positive against 100% of rhodopsin's.

DU ships an update every 4 months, rhodopsin every 2 months. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | DU | rhodopsin |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [4.5 (33 ratings)](https://appshunter.io/ios/app/du-vfx/id1563142095/reviews) | **[5.0 (25 ratings)](https://appshunter.io/ios/app/rhodopsin/id6471383189/reviews)** |
| Number of ratings | **33** | 25 |
| Positive reviews | 70.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#199** |
| Size | 17 MB | 293 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Kris Collins](https://appshunter.io/developer/288419971) | [Christopher Barth](https://appshunter.io/developer/1715210913) |

## What reviewers say

### DU

[App page](https://appshunter.io/ios/app/du-vfx/id1563142095)

Transform videos into extreme digital art with 37 unique filters. This experimental app allows you to digitally mangle and twist footage, creating unique visual effects. Save any frame as a still image or export the entire glitched-out video.

**Highlights:** 37 exclusive video filters, Apply filters in infinite combinations, Arrange video effects stack manually, Blend glitched video with original, Randomize filters for unique chaos, Save affected video frames as stills

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Still Image Export | $0.99 | one-time |


### rhodopsin

[App page](https://appshunter.io/ios/app/rhodopsin/id6471383189)

**Currently charting:** #199 Top Paid · Photo & Video (US App Store)

This app is a video synthesizer designed for live performances. It allows users to mix video sources and apply a series of three effects. Parameters for sources, mixers, and effects can be manipulated using LFOs, envelopes, and MIDI.

**Highlights:** Video source mixing, Three sequential effects, LFO and envelope control, MIDI parameter control, Live performance focused

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

**In-app purchases:** none


## Frequently asked questions

### Is DU free?

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

### Is rhodopsin free?

rhodopsin costs $9.99, with no in-app purchases.

### Which has better reviews, DU or rhodopsin?

rhodopsin is rated higher. DU averages 4.5 out of 5 from 33 ratings, while rhodopsin averages 5.0 from 25 ratings.

### Do DU or rhodopsin have ads?

Neither DU nor rhodopsin shows ads.

### Which is updated more often, DU or rhodopsin?

DU ships an update every 4 months, and rhodopsin every 2 months. Most recently, DU was updated on October 22, 2026 and rhodopsin on October 25, 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.*