Impaktor vs Agonizer
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
Agonizer
This app is a monophonic synthesizer focused on bass sounds, developed with a synth bass expert. It features dual wavetable oscillators, a mangle section, and built-in stereo effects. It supports MPE controllers and various audio/MIDI connectivity options for standalone or app-to-app use.
- Monophonic synth engine for bass
- Dual wavetable oscillators
- Built-in stereo effects
- MPE controller support
- Standalone and AUv3 operation
- 140+ factory presets
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Agonizer is a monophonic synthesizer designed in collaboration with YouTuber and synth bass expert Jakob Haq of haQ attaQ Overview: * Monophonic Synth Engine with focus on Bass * Built-in stereo effects * 140+ fine tuned factory presets designed by Jakob Haq * Supports ROLI Seaboard and other MPE controllers out of the box * Standalone operation with support for USB audio interfaces, wired, network & bluetooth MIDI * Audio Unit v3 Extension * Inter App Audio support * Audiobus support * Ableton Link Synth Voice: * Dual Wavetable Oscillators with 40+ Wavetables, Morphing & X-Mod * Dedicated sub osc & noise source * Mangle Section with pre-filter Drive, Bitcrush, Lift and Push controls * VA Ladder filter * Wobulator (Highly tweak-able Sequenced LFO) * LFO with Key and BPM Sync * Variable Slope AD & ADSR Envelopes * Tube based master drive Effects: * 2x stereo effect units * Vintage Chorus * Digital Delay Presets: * Factory bank including 140+ presets designed by Jakob Haq * Preset Management with Templates & Categories * Shared User Presets between Standalone and AUv3 versions * Preset Export & Import Connectivity: * Standalone * AUv3 Instrument * Inter-App Audio Instrument * Audiobus Instrument Requirements: * iOS12+ * iPad Air 2 or newer
Screenshots
Verdict
The clearest difference is rating: Agonizer at 4.8 against Impaktor's 3.7. Agonizer also leads on chart position (#189 vs unranked) and update cadence (every 5 months vs every 12 months). Impaktor's advantage is in-app purchases (none vs 3) and price ($6.99 vs $7.99). On review sentiment, 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
Impaktor costs $6.99 and Agonizer $7.99 up front. Agonizer sells 3 one-off in-app purchases. Impaktor asks for nothing beyond the download.
Agonizer holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 53 and 203 respectively. Written reviews split almost evenly too, at 79% and 78% positive.
Impaktor ships an update every 12 months, Agonizer every 5 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | Impaktor | Agonizer |
|---|---|---|
| Price | $6.99 — better | $7.99 |
| Rating | 3.7 (53 ratings) | 4.8 (203 ratings) — better |
| Positive reviews | 78.9% of reviews — better | 78.0% of reviews |
| Number of ratings | 53 | 203 — better |
| Update frequency | Every 12 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | — | #189 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 17 MB | 362 MB |
| Age rating | 4+ | 4+ |
| Developer | BeepStreet | Kai Aras |
Customer experience
Impaktor
Agonizer
User reviews
Impaktor
From 53 App Store ratingsWhat we love
- 🚀 Extraordinary app
- 👍 Responsive and intuitive
- 👍 Sleek and appealing interface
- 🎨 Versatile and expressive sounds
- 🎨 Organic and natural feel
Room to improve
- 🐛 Crashes with Inter-App Audio
- 🐛 Issues with WAV exports
- 🐛 Latency problems on certain devices
- 🐛 Compatibility issues with iOS updates
- 🐛 Unreliable saving functionality
Agonizer
From 203 App Store ratingsWhat we love
- 🎵 Excellent sound quality and unique bass tones
- 🎨 Intuitive and well-designed user interface
- ⚙️ Powerful modulation and sound design capabilities
- 🎛️ Wobulator feature for creative bass manipulation
- 📦 Great presets included with the app
Room to improve
- 🐛 Keyboard legato/mono-synth behavior inconsistent
- 🐛 Frequent crashes in host applications (AUM, Cubasis, Audiobus)
- 🐛 No sound output in GarageBand and some AU hosts
- 🐛 App freezes on splash screen with iOS 18.3
- 🐛 UI responsiveness issues and knob lag
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
Show 1 moreShow fewer
- Landscape mode for iPad
Agonizer
Reported bugs
16 issues- Keyboard does not properly handle legato/mono-synth note priority
- Crashes in Audiobus, AUM, and Cubasis host applications
- No sound output when used as AUv3 plugin in hosts
- No sound in GarageBand integration
- App freezes on splash screen with iOS 18.3
Show 11 moreShow fewer
- Stuck notes and failed note triggering
- Scream button malfunction when switching presets
- Cutoff knob lag in AUv3 scenarios
- UI jitter and text cutoff on iPhone
- Favorite preset feature not working on iPhone
- Program change not working properly in hosts
- Always opens with init preset in host applications
- Modulation matrix sensitivity too high (2% movement = large range)
- Audio output peaks in red with no sound
- Permanent clipping/damaged audio output
- Misleading IAP pricing display (showing 'FREE' for paid content)
Requested features
10 requests- Polyphony mode or toggle between mono and poly
- Envelope drawing capability instead of preset selection
- Menu-based waveform selection instead of cycling
- Arpeggiator function
- Preset browser search and favorites filter
Show 5 moreShow fewer
- Extended automation control for all knobs
- Keytracking for filter
- Reverb effect
- Accelerometer/gyroscopic velocity sensitivity
- Customizable number of keyboard keys
In-app purchases
Impaktor
No in-app purchases
Agonizer
- Neon Nightmare Pack$1.99
- Chrome Oasis Pack$1.99
- Circuit Bender Pack$1.99









