PolyIvoks Filter vs Claravox
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.
Claravox
This app provides an advanced interface for sound design and preset management for a specific theremin instrument. It unlocks additional synthesis features and allows users to craft, store, and share custom sonic creations.
- Intuitive graphical interface for all control parameters
- Access advanced synthesis engine features
- Create, store, and manage new presets
- Edit existing presets and re-sculpt sounds
- Share custom sonic creations and libraries
- Update theremin firmware
- Exclusive library of new presets
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Take full control of your Claravox Centennial Theremin with the Moog Claravox Advanced Software Editor. This Universal App (iOS & MacOS) puts the power of sound design in your hands by displaying all Claravox control parameters in a single intuitive graphical interface. Access new layers of the Claravox Centennial’s synthesis engine, unlocking advanced sonic features not found on the front panel such as a second oscillator, scannable wavetables, an additional filter (state-variable), modulation routings, and more. Easily craft new and exciting sounds for your Moog Claravox, re-sculpt existing presets, and share your sonic creations with others. The Moog Claravox Advanced Software Editor also includes an exclusive library of new presets to kick-start your creative process. NOTE: This application does not make sound by itself. It is an editor librarian app for the Moog Claravox Centennial Theremin. To use this app, you must connect Claravox to your MacOS or iOS device via USB or DIN MIDI and select the appropriate ports in the App MIDI settings. Examples of common adapters include: the Apple Lightning to USB Camera adapter (for iOS devices with Lightning connector) and a USB 2.0 cable, the Apple USB-C to USB adapter (for devices with USB-C port) and a USB 2.0 cable, or a Bluetooth enabled MIDI dongle. FEATURES • Create, store, and manage new presets • Edit existing presets • Access advanced sonic features not found on the Claravox Centennial front panel • Craft new sounds in real-time while playing your Claravox Centennial Theremin • Create or edit preset libraries with built in Library Manager • Unlimited preset storage • Share custom libraries of your Claravox presets with others • Edit Claravox Centennial’s global settings • Update Claravox Centennial’s firmware • Read Claravox Centennial’s manual
Screenshots
Verdict
The clearest difference is review sentiment: PolyIvoks Filter at 86% against Claravox's 0%. PolyIvoks Filter also leads on ratings volume (21 vs 3) and iOS requirement (10.0 vs 14.3). Claravox's advantage is in-app purchases (none vs 1) and rating (5.0 vs 4.7). On price, update cadence, ads and device support 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. Claravox asks for nothing beyond the download.
Claravox holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: PolyIvoks Filter has 21 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 86% of PolyIvoks Filter's written reviews are positive against 0% of Claravox's, so the app with the better star average is not the one people write more warmly about.
PolyIvoks Filter ships an update fortnightly, Claravox every 3 weeks. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.
| Parameter | PolyIvoks Filter | Claravox |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (21 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 85.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 21 — better | 3 |
| Update frequency | Fortnightly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 10.0 — better | 14.3 |
| Further details — not scored | ||
| Size | 17 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | RRS, OOO | Moog Music Inc. |
Customer experience
PolyIvoks Filter
Claravox
In-app purchases
PolyIvoks Filter
- RRS PolyIvoks Filter Unlimited$4.99
Claravox
No in-app purchases









