WoolImager vs rhodopsin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WoolImager
Transform your photos into unique wool-like line art. Observe the organic growth of lines and guide their direction with touch gestures to create painterly effects.
- Photo to wool-like line art conversion
- Observe line growth process
- Finger tracing to change growth direction
- Create paint-like art effects
- Supports iPhone and iPad
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A wool-like curve line art image is generated from a picture. The growth process of wool lines can be observed. The direction of growth is changed by finger tracing on screen. You can get a image like paint art.
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
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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: WoolImager at $1.99 against rhodopsin's $9.99. WoolImager also leads on iOS requirement (9.3 vs 15.0). rhodopsin's advantage is update cadence (every 2 months vs every 29 months) and ratings volume (25 vs 3). On rating, review sentiment, ads and in-app purchases 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
WoolImager costs $1.99 and rhodopsin $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for WoolImager against 5.0 for rhodopsin. That said, the two scores are not equally well evidenced: rhodopsin has 25 ratings behind it against 3, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
WoolImager ships an update every 29 months, rhodopsin every 2 months. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.
| Parameter | WoolImager | rhodopsin |
|---|---|---|
| Price | $1.99 — better | $9.99 |
| Rating | 5.0 (3 ratings) | 5.0 (25 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 3 | 25 — better |
| Update frequency | Every 29 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.3 — better | 15.0 |
| Further details — not scored | ||
| Size | 48 MB | 293 MB |
| Age rating | 4+ | 4+ |
| Developer | NOBORU IMAI | Christopher Barth |
Customer experience
WoolImager
rhodopsin
In-app purchases
WoolImager
No in-app purchases
rhodopsin
No in-app purchases
