PolyIvoks Filter vs Zen AutoPan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PolyIvoks Filter
This audio effect plugin emulates the sound of a legendary 1980s Soviet synthesizer filter. It offers stereo output and a range of modulation and envelope controls for creative sound shaping. A demo version is available with limited free play time.
- Standalone and AUv3 plugin
- Modeled vintage filter
- LFO and envelope modulation
- Stereo output
- Scalable GUI
- Undo/Redo and A/B comparison
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PolyIvoks Filter AUv3 plug-in — comes as time-limited Demo-version for you to try. It gives you 5 minutes of Free play time. (You can reload the PolyIvoks Filter AUv3 plug-in as many times as you want, thereby you get the Demo period again and again.) Unlimited version of PolyIvoks Filter AUv3 plug-in comes as In-App Purchase PolyIvoks Filter developed on the basis of the filter of the legendary Soviet synthesizer from 1980s, and only now the legendary Soviet analog sound became available in stereo mode. Features: • Standalone and AUv3 plug-in; • Precise port of Rack Extensions plug-in; • Modeled vintage Filter; • Undo/Redo; • A/B comparison; • 2x/4x/8x Upsampling; • Macro controllers; • Built-in Gain Match; • Scalable GUI. MODULATOR house the LFO controls: MODE — which offers four waveforms, including Noise and a stepped function for Sample & Hold effects, well as SPEED control. FILTER: The four controls adjust CUTOFF, RESONANCE, LPF to BPF switch, MODULATION (LFO) level and ENVELOPE level (You can set positive or negative values). ENVELOPE: repeating ATTACK/DECAY envelope. MASTER: the rightmost unit has 3 regulators ENVELOPE level (You can set positive or negative values), VOLUME (output gain) and DIGITAL/ANALOG switch. To use PolyIvoks Filter as a plug-in, you need an AUv3-compatible host app like GarageBand, Auria, AUM, Cubasis and more — PolyIvoks Filter will appear in the list of Audio Unit extensions for effect plug-ins in the host app.
Zen AutoPan
This AUv3 stereo movement tool offers dynamic panning effects for music production and sound design. Sculpt your audio with multiple LFO shapes and an intuitive XY pad for real-time creative control. Seamlessly integrate with compatible DAWs on iOS devices.
- Multiple LFO Shapes
- Intuitive XY Pad
- Adjustable Stereo Width
- AUv3 Compatibility
- Optimized for iOS
- 3D Visuals
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FX Forms #002 - Zen AutoPan from Wild Surmise Music, second offering in the series of AUv3 FX plugins. Note: This needs a compatible DAW App such as Logic Pro, AUM, Cubasis, Garageband etc to use the AUv3 plugin. Zen AutoPan is not merely a tool, but an invitation to dance with the rhythm of the universe. Designed with the meticulous care of a Zen garden, this AUv3 app is a portal to experiencing the dynamic interplay of sound and silence. As Alan Watts might say, it allows you to "play" with your music, weaving the fabric of stereo panning effects into the tapestry of auditory experience. In the act of creating or enhancing sound, Zen AutoPan becomes a partner in the dance of existence, moving with the effortless grace of a leaf on a breeze. It's here, in the realm of music production and sound design, that Zen AutoPan offers a reflection of the universe's own symphony, inviting you to partake in the cosmic play of sound and silence, movement and stillness. Features: - Multiple LFO Shapes: Choose from sine, square, sawtooth, and random LFO shapes to sculpt your sound. - Intuitive XY Pad: Control the depth and speed of your stereo panning effects with an easy-to-use XY pad, allowing for real-time adjustments and creative expression. - Width Control: Adjust the stereo width to go from subtle spatial enhancements to full stereo sweeps, giving your tracks a larger-than-life presence. - Versatile Use: Ideal for music production, live performances, and sound design projects. - AUv3 Compatibility: Seamlessly integrates with your favorite DAW or music production app, offering flexibility and ease of use. - Optimized for iOS: Crafted specifically for the iOS environment, Zen AutoPan ensures a stable, high-performance experience on your favorite devices. 3D Visuals leverage SceneKit and Metal Shaders providing good visual performance on iOS devices and can also be turned off in the info menu.
Screenshots
Verdict
The clearest difference is in-app purchases: Zen AutoPan at none against PolyIvoks Filter's 1. PolyIvoks Filter's advantage is update cadence (fortnightly vs every 13 months) and iOS requirement (10.0 vs 15.0). On price, rating, review sentiment and ratings volume 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. PolyIvoks Filter sells 1 one-off in-app purchase. Zen AutoPan asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for PolyIvoks Filter against 4.6 for Zen AutoPan. Both are backed by a comparable volume of ratings — 21 and 14 respectively. Written reviews are what separate them: 86% of PolyIvoks Filter's written reviews are positive against 80% of Zen AutoPan's.
PolyIvoks Filter ships an update fortnightly, Zen AutoPan every 13 months. The most recent releases landed on October 1, 2026 and September 9, 2026 respectively.
| Parameter | PolyIvoks Filter | Zen AutoPan |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (21 ratings) — better | 4.6 (14 ratings) |
| Positive reviews | 85.7% of reviews — better | 80.0% of reviews |
| Number of ratings | 21 — better | 14 |
| Update frequency | Fortnightly — better | Every 13 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 17 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | RRS, OOO | Tom Power |
Customer experience
PolyIvoks Filter
Zen AutoPan
In-app purchases
PolyIvoks Filter
- RRS PolyIvoks Filter Unlimited$4.99
Zen AutoPan
No in-app purchases









