FotoDa vs rhodopsin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FotoDa
Transform your photos into unique abstract art with this app. Easily create stunning collages from your existing pictures and share your artistic visions.
- Generate abstract art collages
- Use photos from your phone
- Save creations
- Share artwork
Read full descriptionHide full description
Instantly generate abstract photo collages from pictures on your phone. Save and share your creations.
rhodopsin
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.
- Video source mixing
- Three sequential effects
- LFO and envelope control
- MIDI parameter control
- Live performance focused
Read full descriptionHide full description
rhodopsin is a video synthesizer for live video performances. It feeds video sources into a mixer into three effects in series. Source, mixer and effect parameters can be controlled by LFOs, envelopes and MIDI.
Screenshots
Verdict
The clearest difference is price: FotoDa at Free against rhodopsin's $9.99. FotoDa also leads on ratings volume (139 vs 25). rhodopsin's advantage is rating (5.0 vs 4.0) and review sentiment (100% vs 59%). On ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
FotoDa is free to download; rhodopsin costs $9.99 up front. FotoDa sells 1 one-off in-app purchase. rhodopsin asks for nothing beyond the download.
rhodopsin holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: FotoDa has 139 ratings behind it against 25, so its average is the more settled of the two. Written reviews point the same way: 59% of FotoDa's written reviews are positive against 100% of rhodopsin's.
FotoDa ships an update every 8 months, rhodopsin every 2 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.
| Parameter | FotoDa | rhodopsin |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 4.0 (139 ratings) | 5.0 (25 ratings) — better |
| Positive reviews | 58.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 139 — better | 25 |
| Update frequency | Every 8 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | — | #199 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 293 MB |
| Age rating | 4+ | 4+ |
| Developer | Zevan Rosser | Christopher Barth |
Customer experience
FotoDa
rhodopsin
Bugs and requests
FotoDa
Reported bugs
15 issues- App crashes on launch with spinning spiral
- Crashes when uploading or selecting photos
- Freezes when scrolling through photo library
- Crashes when saving or tapping too quickly
- Crashes after recent iOS updates
Show 10 moreShow fewer
- App won't rotate from portrait to landscape
- Photos are zoomed/cropped incorrectly
- Right half of photos cut off after updates
- Unable to access previously selected images
- Real-time editing feature non-functional
- High-res image generation broken
- IAP (In-App Purchase) not working properly
- App incompatible with iOS 12 and older devices
- Slow performance on iPad Air and older models
- Undo function not clearly documented
Requested features
15 requests- Landscape/horizontal output format support
- Higher resolution export options
- Individual layer blending mode controls
- Ability to reposition and resize images
- Photo transparency adjustment controls
Show 10 moreShow fewer
- Layer-by-layer effect customization
- Single-tap hide/show image toggle
- More transparent UI menu design
- Clear/reset function for starting over
- Ability to select single photo for blending
- Batch processing capabilities
- Save to multiple folders functionality
- Better photo library organization and sorting
- Comprehensive user documentation/FAQ
- Landscape mode rotation support on iPad
rhodopsin
Not enough reviews yet to summarise bugs or requests.
In-app purchases
FotoDa
- FotoDa Advanced Features$2.99
rhodopsin
No in-app purchases
