Comparison

Agonizer vs AddStation

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Monophonic synth engine for bass
  • Dual wavetable oscillators
  • Built-in stereo effects
  • MPE controller support
  • Standalone and AUv3 operation
  • 140+ factory presets
Features
Read full description

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

About

AddStation

Explore new sonic territories with this advanced additive synthesis tool. Create complex timbres by combining thousands of sine waves and unique morph sequencing. Integrate seamlessly with iOS production environments and enjoy a suite of built-in effects.

Highlights
  • Fractal additive synthesis
  • Sound morphing
  • Over 170 sound presets
  • AUv3 AudioUnit integration
  • Built-in effects suite
  • Audiobus 3 and Ableton Link support
Features
Read full description

The next generation of additive synthesis Additive synthesis is a sound synthesis technique that creates timbre by adding sine waves together. The timbre of musical instruments can be considered to consist of multiple harmonic or inharmonic partials or overtones. VirSyn already has a remarkable track record of products ( CUBE, POSEIDON ) trying to make this virtually unlimited synthesis method manageable for creative sound designers and musicians. AddStation is the next step forward giving you a tool to explore completely new sonic territory. The massive amount of sine waves in AddStation - thousands per voice - together with unique morph sequencing blocks blur the frontiers between analog and digital sonic realms. And all this integrated in all relevant iOS production environments especially the emerging AUv3 AudioUnit standard. Synthesis • Fractal additive synthesis • over 170 sound presets • Four parts with 8 Additive Sequence Blocks • Sound morphing • up to 512 partials per voice with independent AD envelopes • harmonic/inharmonic spectra • Ringmodulation • arbitrary filter function and noise spectra • four independent analog style Arpeggiators Effects • Chorus • Phaser • Flanger • Overdrive • Parametric EQ • Echo/Delay • Reverb Global • AUv3 for Host integration • Audiobus 3 compatible (Input slot) with state saving • Support for Ableton Link. • Inter-app audio compatible (Instrument/Generator) • CoreMIDI / Virtual MIDI • Audio recorder.

Screenshots

Agonizer4 screens
AddStation4 screens

Verdict

The call

The clearest difference is price: AddStation at $8.99 against Agonizer's $19.99. AddStation also leads on in-app purchases (none vs 3) and update cadence (weekly vs every 5 months). Agonizer's advantage is rating (4.8 vs 4.5) and ratings volume (203 vs 43). On review sentiment, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Agonizer costs $19.99 and AddStation $8.99 up front. Agonizer sells 3 one-off in-app purchases. AddStation asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Agonizer holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 203 and 43 respectively. Written reviews complicate that: 78% of Agonizer's written reviews are positive against 82% of AddStation's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Agonizer ships an update every 5 months, AddStation weekly. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

Scorecard6 real differences · 4 level
Agonizer versus AddStation: the parameters behind the verdict, then further details
ParameterAgonizerAddStation
Price$19.99$8.99 — better
Rating4.8 (203 ratings) — better4.5 (43 ratings)
Positive reviews77.8% of reviews82.1% of reviews — better
Number of ratings203 — better43
Update frequencyEvery 5 monthsWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better12.0
Further details — not scored
Size362 MB133 MB
Age rating4+4+
DeveloperKai ArasHarry Gohs

Customer experience

Agonizer

All ratings203 ratings
Positive95.6%
Neutral1.5%
Negative3.0%
Written reviews81 reviews
Positive77.8%
Neutral6.2%
Negative16.0%

AddStation

All ratings43 ratings
Positive88.4%
Neutral4.7%
Negative7.0%
Written reviews39 reviews
Positive82.1%
Neutral2.6%
Negative15.4%

Bugs and 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
Show 11 more
  • 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 more
  • Extended automation control for all knobs
  • Keytracking for filter
  • Reverb effect
  • Accelerometer/gyroscopic velocity sensitivity
  • Customizable number of keyboard keys

AddStation

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Agonizer

One-time3
  • Chrome Oasis Pack$3.99
  • Circuit Bender Pack$3.99
  • Neon Nightmare Pack$4.99
None

AddStation

No in-app purchases

Questions

Is Agonizer free?
Agonizer costs $19.99, and also offers in-app purchases.
Is AddStation free?
AddStation costs $8.99, with no in-app purchases.
Which has better reviews, Agonizer or AddStation?
Agonizer is rated higher. Agonizer averages 4.8 out of 5 from 203 ratings, while AddStation averages 4.5 from 43 ratings.
Do Agonizer or AddStation have ads?
Neither Agonizer nor AddStation shows ads.
Which is updated more often, Agonizer or AddStation?
Agonizer ships an update every 5 months, and AddStation weekly. Most recently, Agonizer was updated on October 14, 2026 and AddStation on October 9, 2026.

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