VOSIS vs TriplexClassic
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!
TriplexClassic
This application offers a classic FM synthesizer experience with a modern interface. It allows for a wide range of sounds, from clean to distorted, with six specialized macro controls for easy sound shaping. An LFO and drive control further enhance its sound design capabilities.
- 3 operator FM synth engine
- Up to 8 voices
- 6 specialized macro controls
- LFO with shape control
- Drive control
- Modern, accessible interface
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Classic FM sounds with a modern twist! TriplexClassic takes inspiration from famous digital synthesizers of the 80s and puts them in an easy-to-use, accessible interface. The synth engine was developed from the ground up to facilitate sounds ranging from pristine modern FM sounds to crunchy bit-crushed mayhem - with everything in between. It is equipped with 6 highly specialized macro controls that makes it easy to set up without any tedious programming. Features: - 3 operator FM synth engine with up to 8 voices - Macro controls over FM amount, harmonicity, phase and bit resolution (labeled "redux"), attack, combined decay/release and sustain - LFO with shape control (sine, triangle, ramp up, ramp down, square, random) and user-definable destination - Drive control KNOWN ISSUES: As of right now the standalone app does not support incoming Midi. Please use TriplexClassic hosted as an AUv3 plugin.
Screenshots
Verdict
The clearest difference is rating: TriplexClassic at 5.0 against VOSIS's 4.2. TriplexClassic also leads on update cadence (every 5 days vs every 8 months) and review sentiment (100% vs 86%). On price, ads, in-app purchases and monetization model 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.
TriplexClassic holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 5 and 15 respectively. Written reviews point the same way: 86% of VOSIS's written reviews are positive against 100% of TriplexClassic's.
VOSIS ships an update every 8 months, TriplexClassic every 5 days. The most recent releases landed on September 4, 2026 and August 19, 2026 respectively.
| Parameter | VOSIS | TriplexClassic |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) | 5.0 (15 ratings) — better |
| Positive reviews | 85.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 5 | 15 — better |
| Update frequency | Every 8 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 14 |
| Further details — not scored | ||
| Size | 11 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Life Orange LLC | Christopher Herb |
Customer experience
VOSIS
TriplexClassic
In-app purchases
VOSIS
No in-app purchases
TriplexClassic
No in-app purchases







