VOSIS vs Filterjam
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VOSIS
This app transforms image data into sound, allowing for unique musical compositions and experimental sound design. It offers control over pitch, timbre, and envelopes to create shape-timbre relationships from visual input.
- Image sonification
- Visual music composition
- Experimental sound design
- Pixel luminance audification
- Shape-timbre relationships
- Adjustable pitch and timbre
- ADSR envelope control
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VOSIS is a synthesizer combining audification of greyscale pixel data with several image filters. It is a tool for image sonification, visual music composition, and experimental sound design. The audification of pixel luminance values creates shape-timbre relationships. Pixel scan rate is controlled in terms of note interval, octave, and scale to give varying pitch between image regions. The ADSR envelope allows one to play images as a non-linear sequence of pitches with varying wavetable/timbre. For more features including presets and unlimited recording see VOSIS Pro. Visit vosis.app for sound example, demo videos, and user guide!
Filterjam
This app offers a multiband resonant filter for creating unique audio effects. It divides input signals into four bands, allowing for various sonic manipulations from subtle enhancements to extreme sound mangling.
- Multiband resonant filtering
- 4-band signal division
- Sum or multiply band modes
- Versatile sound shaping
- Ringmod-like effects
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Filterjam is a multi-band resonant filter delivering weird ringmod-like filtered sounds. The input signal is divided into 4 bands that are then summed or multiplied together according to the selected mode. Filterjam can be very harsh or gentle, it can add brightness or depth to synth sounds, but it can also completely mangle acoustic sources.
Screenshots
Verdict
The clearest difference is rating: Filterjam at 5.0 against VOSIS's 4.2. Filterjam also leads on ratings volume (34 vs 5). VOSIS's advantage is update cadence (every 8 months vs every 22 months). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Filterjam holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Filterjam has 34 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 86% of VOSIS's written reviews are positive against 83% of Filterjam's, so the app with the better star average is not the one people write more warmly about.
VOSIS ships an update every 8 months, Filterjam every 22 months. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.
| Parameter | VOSIS | Filterjam |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) | 5.0 (34 ratings) — better |
| Positive reviews | 85.7% of reviews — better | 83.3% of reviews |
| Number of ratings | 5 | 34 — better |
| Update frequency | Every 8 months — better | Every 22 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 11 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Life Orange LLC | AudioThing Ltd. |
Customer experience
VOSIS
Filterjam
In-app purchases
VOSIS
No in-app purchases
Filterjam
No in-app purchases
