Impaktor vs QuantiChord
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Impaktor
This app transforms any surface into a playable percussion instrument using your device's microphone. It offers a vast sonic palette with advanced sound modules and synthesis types, allowing for a wide range of acoustic, electronic, and industrial tones. Enjoy a realistic virtual drumming experience with low latency and a 6-track recorder.
- Surface-to-percussion instrument transformation
- Advanced sound module simulation
- Semi-modular synthesis architecture
- Physical modeling, FM, and noise shaping synthesis
- 6-track audio recorder with 3D panning
- Ultra-low latency performance
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* "Without doubt the most powerful and genuinely useful percussion app on the App Store right now" Computer Music * Reached the #1 paid music app in 5 countries * SonicTouch (www.sonicstate.com) gold award Impaktor is a drum synthesizer with a vast sonic palette, that turns any surface into a playable percussion instrument. You just slap your desk like you would a real drum. The real acoustical impulses from the built-in microphone are used as an excitation source for advanced sound modules that simulates behavior of membranes, cymbals, metallophones or strings. This makes Impaktor a highly responsive and expressive instrument. With semi-modular architecture and several types of synthesis, Impaktor can produce a wide range of tones, from acoustic, like Tabla, Djembe, Marimba, Cymbals, Metal bars to electronic or industrial sounds. We strongly recommend using the app with wired headphones to avoid acoustic feedback and ensure ultra-low latency. (USB-C to 3.5 mm Headphone Jack Adapter, USB-C headphones or an audio interface). You can use the Impaktor app with a contact microphone or analog drum pad to achieve isolated and sensitive input, reducing ambient noise and enhancing trigger accuracy. Enjoy the most realistic virtual drumming experience available for mobile devices! SYNTHESIZER - Synthesis: physical modeling, frequency modulation, noise shaping - Semi-modular architecture; 2 modules with configurable routing - 2 modulation sources: velocity and lfo-envelope. Almost every parameter can be modulated - Multimode filter, harmonic exciter and several types of amplifiers - Over 90 presets available, more coming soon - No samples used - Ultra low latency RECORDER - 6 tracks audio recorder - True 3d panning - Auto-quantization with configurable time-signature - Reverb and Delay effects - Audio-copy and wave export
QuantiChord
This app generates chords from incoming notes and quantizes them to a selected scale. It functions as a standalone application or an AUv3 MIDI effect plugin, offering extensive MIDI connectivity and an internal sound bank.
- Standalone app and AUv3 MIDI effect plugin
- Chord generation with transposing notes
- Scale quantization
- Full internal and external MIDI support
- Internal sound bank
- Preset management and sharing
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"QuantiChord" is a MIDI effect that generates chords from incoming notes and quantizes the results to a pre-defined scale. It can be used as a standalone application or as an AUv3 MIDI effect plug-in. The chord is generated by adding up to 8 transposed notes to the original note played. Once the chord is generated, it is quantized to limit it to the selected output scale. The application supports full internal and external MIDI connections for input and output. An internal sound bank is included. The AUv3 MIDI effect plug-in supports multiple instances. A compatible host is required to run the plug-in. The host must support the Audio Unit v3 (AUv3) MIDI effect format. Hosts supporting AUv3 MIDI effect on iOS: Logic Pro, Cubasis, Beatmaker, AUM, Audiobus, NanoStudio, Auria Pro, apeMatrix. Hosts supporting AUv3 MIDI effect on macOS: Logic Pro 10.7 or later. Features: • Standalone application and AUv3 MIDI effect plug-in • 8 transposing sliders from -24 to +24 semi-tones (+/- 2 octaves) • 1 global transposer slider • Scale quantizer • Lockable parameter protection when switching presets • Resizable keyboard • Multitasking support • Stop "Audio Background" automatically after inactivity (15 min, 30 min, 1 h, 2 h, or never) • Sample-accurate timing • Internal sound bank • Receiving MIDI from external MIDI sources • Internal routing of inputs, outputs • Send MIDI to a virtual port usable as MIDI input by other "Core MIDI" compatible apps • Random creation of presets • Presets browser • "Program Change" support • Preset sharing support by "AirDrop", "Mail", "Messages", and other supported services • Native iCloud support • "iCloud Drive" support in the "Files" app on iOS and "Finder" on macOS • Full support of "Windowed Apps" mode on iPad • Undo/Redo Supported MIDI connections: • Virtual "Core MIDI" connections between applications • Any compatible MIDI interface • MIDI over Wi-Fi • MIDI over Bluetooth
Screenshots
Verdict
The clearest difference is price: Impaktor at $6.99 against QuantiChord's $12.99. Impaktor also leads on review sentiment (79% vs 60%) and ratings volume (53 vs 11). QuantiChord's advantage is update cadence (every 2 months vs every 12 months) and rating (4.0 vs 3.7). On ads, in-app purchases, monetization model 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
Impaktor costs $6.99 and QuantiChord $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
QuantiChord holds the better App Store score, 4.0 against 3.7. Both are backed by a comparable volume of ratings — 53 and 11 respectively. Written reviews complicate that: 79% of Impaktor's written reviews are positive against 60% of QuantiChord's, so the app with the better star average is not the one people write more warmly about.
Impaktor ships an update every 12 months, QuantiChord every 2 months. The most recent releases landed on September 21, 2026 and August 27, 2026 respectively.
| Parameter | Impaktor | QuantiChord |
|---|---|---|
| Price | $6.99 — better | $12.99 |
| Rating | 3.7 (53 ratings) | 4.0 (11 ratings) — better |
| Positive reviews | 78.8% of reviews — better | 60.0% of reviews |
| Number of ratings | 53 — better | 11 |
| Update frequency | Every 12 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 17 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | BeepStreet | Laurent Colson |
Customer experience
Impaktor
QuantiChord
Bugs and requests
Impaktor
Reported bugs
5 issues- Crashes with Inter-App Audio
- Issues with WAV exports
- Latency problems on certain devices
- Compatibility issues with iOS updates
- Unreliable saving functionality
Requested features
6 requests- MIDI support
- Audio import functionality
- Ableton Link sync
- More quantization options
- Multitrack export
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- Landscape mode for iPad
QuantiChord
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Impaktor
No in-app purchases
QuantiChord
No in-app purchases









