FAC Phazer vs VAPolyFM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FAC Phazer
This music effect plugin offers a rich sonic palette inspired by classic guitar pedals and hardware synthesizers. It provides extensive control over phasing effects with adjustable LFOs, unique characters, and versatile modulation options for all instruments and genres.
- Inspired by classic phaser units
- Adjustable LFO with tempo sync
- Four unique sonic characters
- External modulation and Step mode
- Stereo phase modulation
- Universal AUv3 purchase
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• Inspired by famous phaser units from guitarist and keyboardist world • Unique sonic character combined with a large amount of control • Adjustable LFO; diverse waveforms and synchronizable to host tempo • Versatile: External modulation (parameters), Step mode, and more • Unique Butterfly Meter: Shows LFO modulation and output level • Suitable for all musical genres and instruments • Stereo, adjustable phase modulation distance between both channels • Includes various presets for inspiration • Advanced Responsive Design, portrait and landscape views • Universal Purchase: AUv3 for iOS (iPad/iPhone), macOS and Vision Pro FAC Phazer will satisfy most fans of phasing effects, seducing them with its rich sonic palette and elegant interface. To achieve the classic phase effect, the original signal is blended with a slightly out-of-phase copy of itself. Altering the timing difference between the two signals produces the swooshing sound characteristic of phasing. Most phaser units available on the market are built around this circuit topology, each with its own specificities and limitations. Guitar pedals provide a great sonic signature out of the box and are a great source of inspiration, but we often overlook the impressive built-in effects sections of some hardware synthesizers. FAC Phazer combines the best of both worlds into a single plugin, offering access to all parameters involved in crafting the phasing effect. The design and development were inspired by both pedals and built-in phaser effects found in hardware synthesizers. This led to the creation of four unique characters: Classic, Midori, Step, and Tirus. All parameters can be applied to each of these characters, allowing you to create new, exciting, and outstanding sounds. The presets Slow, Moderate, and Jumpy Phase Pedal or also Fleur d’Oranger bring the classic pedals sound signature within your reach. If you're seeking more modern characteristics, the Step Sound I preset offers a splendid stepping mode, while the Midori Phase Shift II preset emphasizes the feedback in a unique way. On the other hand, the Tirus Anthem preset is an excellent starting point for exploring phasing effects produced with built-in synthesizer effects. An important aspect that strongly contributes to the variety of the sonic palette provided by the plugin is the modulation options. The LFO can run in free mode, be synchronized to the host tempo, or be defined by external automation parameters. The documentation is available at fredantoncorvest.com/FAC_Phazer.html
VAPolyFM
Create music with a versatile hybrid synthesizer offering both FM and virtual analog subtractive synthesis. Explore a wide range of effects, a built-in sequencer, and extensive MIDI support. Save and share projects seamlessly across iPhone, iPad, and Mac.
- FM synthesizer with 6 operators
- Virtual analog subtractive synthesizer
- Built-in effects (delay, chorus, reverb)
- Sequencer with piano roll editor
- AudioUnit Extension (AUv3) support
- Ableton Link and MIDI 2.0 support
- iCloud Drive project sharing
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VAPolyFM is a hybrid polyphonic synthesizer for iPhone, iPad and Mac. It features FM synthesizer and subtractive synthesizer. It operates as a stand alone or as an AudioUnit Extension (AUv3). Stand Alone supports Ableton Link, MIDI and audio file export. FM synthesizer features 6 operators and 32 algorithm and it is inspired by FM synthesizers of the 1980’s. Virtual analog subtractive synthesizer features two oscillators, resonant high pass filter, resonant low pass filter and two ADSR envelopes per voice. Built-in Effects include delay, chorus, flanger, reverb, eq and compressor. VAPolyFM also includes sequencer which features piano roll editor and parameter automation. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. - Main Features - FM Synthesizer. 6 operators and 32 algorithm. Virtual analog subtractive synthesizer. Maximum 8 voice polyphony. it depends on performance of the device it is running. Built-in effects and sequencer. Support MIDI 2.0 Support Audio Unit Extension (AUv3) Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms. Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) Support Ableton Link, Bluetooth MIDI, MIDI In / Out. Includes 139 Factory Presets - System Requirements - A13 Fusion or above is recommended. AudioUnit Extension (AUv3) requires host application which support AudioUnit Extension. AudioUnit Extension is supported by Apple Logic and Apple Garage Band on iOS and macOS. For any other DAW, it depends on the application and some of them don’t support AudioUnit Extension. Sound may be distorted if CPU of the device doesn't have enough power. If it happens reduce number of voices.
Screenshots
Verdict
The clearest difference is review sentiment: FAC Phazer at 83% against VAPolyFM's 17%. FAC Phazer also leads on rating (5.0 vs 4.5) and price ($9.99 vs $14.99). VAPolyFM's advantage is in-app purchases (none vs 3). On ads, monetization model, device support and iOS requirement 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
FAC Phazer costs $9.99 and VAPolyFM $14.99 up front. FAC Phazer sells 3 one-off in-app purchases. VAPolyFM asks for nothing beyond the download.
FAC Phazer holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: FAC Phazer has 30 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 83% of FAC Phazer's written reviews are positive against 17% of VAPolyFM's.
FAC Phazer ships an update every 4 months, VAPolyFM every 17 months. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.
| Parameter | FAC Phazer | VAPolyFM |
|---|---|---|
| Price | $9.99 — better | $14.99 |
| Rating | 5.0 (30 ratings) — better | 4.5 (6 ratings) |
| Positive reviews | 83.3% of reviews — better | 16.7% of reviews |
| Number of ratings | 30 — better | 6 |
| Update frequency | Every 4 months — better | Every 17 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Requires iOS | 16.4 — better | 16.6 |
| Further details — not scored | ||
| Size | 3 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Frederic Corvest | Ryo Togawa |
Customer experience
FAC Phazer
VAPolyFM
In-app purchases
FAC Phazer
- Small Tip$1.99
- Medium Tip$4.99
- Large Tip$14.99
VAPolyFM
No in-app purchases









