Ruismaker FM vs Agonizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ruismaker FM
Design unique percussion sounds from scratch with a flexible synthesis engine. Create everything from traditional drums to unconventional effects. Offers a standalone Euclidean sequencer for pattern creation and export options.
- FM synthesis engine for percussion
- Create custom drum sounds
- Euclidean sequencer
- AUv3 compatible
- No samples used
- MIDI CC controllable
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Here comes the the crazy twin-sister of Ruismaker, designed for people who want to design their own percussion sounds from scratch. Ruismaker FM's simple, yet flexible synthesis engine lets you create anything from snaredrums, kickdrums and spacy toms to weird and unconventional percussive sounds and effects. Ruismaker FM is a unique drumsynth plugin (i.e. it does not use samples), which is coupled with a creative Euclidean sequencer when run in standalone mode. The plugin is fully AUv3 (Audio Unit) compatible: - Seamless integration with Garageband and other AU hosts - Audio Unit Instrument: making music on iOS doesn't get more convenient - Supports AUv3 Multi-Out in AUM and ApeMatrix - Each sound is modeled using authentic analog and FM algorithms; - Comes with dozens of unique customizable models - Does not use any samples; all sounds are synthesized in realtime, on the fly - Light on the CPU, so you can run lots of Ruismaker FMs simultaneously - Fully automatable parameters (requires host support) and MIDI CC controllable - Has its own preset manager The standalone sequencer is refreshingly different: - Program patterns using Euclidean algorithms - Powerful random feature and mutation probability settings per channel - Syncs with Ableton Link or MIDI Clock - Exports WAV and MIDI - Compatible with Audiobus 3 (including MIDI IN/OUT mode) - CoreMIDI In and Out - AU MIDI output for on-screen pads User manual available on Ruismaker.com
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 in-app purchases: Ruismaker FM at none against Agonizer's 3. Ruismaker FM also leads on update cadence (every 5 weeks vs every 5 months) and price ($4.99 vs $7.99). Agonizer's advantage is chart position (#194 vs unranked) and ratings volume (203 vs 54). On rating, 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
Ruismaker FM costs $4.99 and Agonizer $7.99 up front. Agonizer sells 3 one-off in-app purchases. Ruismaker FM asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Ruismaker FM against 4.8 for Agonizer. Both are backed by a comparable volume of ratings — 54 and 203 respectively. Written reviews are what separate them: 83% of Ruismaker FM's written reviews are positive against 78% of Agonizer's.
Ruismaker FM ships an update every 5 weeks, Agonizer every 5 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.
| Parameter | Ruismaker FM | Agonizer |
|---|---|---|
| Price | $4.99 — better | $7.99 |
| Rating | 5.0 (54 ratings) — better | 4.8 (203 ratings) |
| Positive reviews | 83.3% of reviews — better | 78.0% of reviews |
| Number of ratings | 54 | 203 — better |
| Update frequency | Every 5 weeks — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | — | #194 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 | 11.0 |
| Further details — not scored | ||
| Size | 8 MB | 362 MB |
| Age rating | 4+ | 4+ |
| Developer | Bram Bos | Kai Aras |
Customer experience
Ruismaker FM
Agonizer
Bugs and requests
Ruismaker FM
Not enough reviews yet to summarise bugs or requests.
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
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- 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
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- Extended automation control for all knobs
- Keytracking for filter
- Reverb effect
- Accelerometer/gyroscopic velocity sensitivity
- Customizable number of keyboard keys
In-app purchases
Ruismaker FM
No in-app purchases
Agonizer
- Neon Nightmare Pack$1.99
- Chrome Oasis Pack$1.99
- Circuit Bender Pack$1.99









