Addictive Synth vs SynthMaster One
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Addictive Synth
Create unique sounds and driving loops with a powerful wavetable synthesizer. Explore a vast sonic universe with dynamic oscillators, spectral noise generation, and intelligent randomizers. Play live with an onscreen keyboard or connect a MIDI controller.
- Dynamic wavetable synthesis
- Spectral noise generator
- Intelligent randomizer for sounds and arpeggios
- Onscreen keyboard with live playing capabilities
- MIDI keyboard compatibility
- Programmable arpeggiator
- Audiobus and Inter-app audio support
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It was never so easy to create beautiful sounds and driving loops. The unique dynamic wavetable synthesis allows you to explore an unprecedented wide range of sonic territory. From acid loops, crystal clear percussions, realistic human choirs to complex musical soundscapes nothing seems impossible with only a handful parameters to tweak. The new spectral noise generator adds a new dimension to the already huge sound universe of Addictive Synth. This generator is the first of its kind and allows for extraordinarily detailed control over the dynamic spectrum of the noisy part of sounds. Despite its complexity it's pretty easy to use and integrates naturally into the sound design philosophy of Addictive Synth. Together with the intelligent randomizer for both sounds and arpeggios you will loose any sense of time and space while exploring unknown sonic territories. Right from the beginning you'll understand why it's named Addictive. ***Best iPad Apps of the Week*** AppAdvice.com "Addictive Synth fixes your craving for a massively customizable synthesizer experience on the iPad." - AppAdvice.com "App Of The Week" at iDesignSound.com Features: Dynamic wavetable synthesizer • Six dynamic wavetable oscillators per voice, up to 48 total. • Continuous morphing between two oscillator sets. • Realtime editing of up to 128 partials (overtones). • Realtime editing of filter structure to create arbitrary body resonances. • Extensive modulation possibilities using up to 4 LFOs and 4 Envelopes. • Control matrix allows real time control of five parameters using the X/Y touch pad, the modulation wheel and the tilt sensors of the iPad. • Monophonic or polyphonic with 8 voices. • 128 factory presets, unlimited user presets can be shared. • Up to three effects concurrently usable selected from: equalizer, phaser, flanger, chorus and stereo/cross delay. Live • Play melodies live with the onscreen keyboard. Drag fingers for slides and vibrato. • With the Apple iPad Camera Connection Kit you can use a CoreMIDI compatible MIDI Keyboard to control Addictive Synth. • Line 6 MIDI Mobilizer compatible. • Velocity sensitive keyboard. • Select from dozens of scales and play them with scale optimized keyboard layout. Full featured programmable Arpeggiator • Uses programmable sequences with up to 32 steps. • Can trigger single notes and chords. • Unique randomizer generates Arpeggios with 100% usability. • 32 Arpeggios included, unlimited useer arpeggios possible. • For each step you can program tie, accent, transposition and note order Global • Audiobus 2 compatible (Output) (requires iOS7 or newer). • Inter-app audio compatible (Instrument/Generator) • Export loops as audio and midi files. • Audio pasteboard for exchange with other Apps • Exchange user presets with File Sharing in iTunes.
SynthMaster One
This powerful wavetable synthesizer app offers an intuitive workflow for creating unique sounds. It features a rich library of wavetables, inspiring presets, and a semi-modular architecture for deep sound design. Easily sync data across devices and integrate with DAWs.
- Wavetable synthesis
- Semi-modular architecture
- 650 factory presets
- AUv3 support
- Cross-platform cloud sync
- Real-time modulation feedback
- 32-step arpeggiator/sequencer
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SynthMaster One iOS is KV331 Audio's first full blown universal synth app on iOS platform. It's a powerful wavetable synth with an intuitive workflow. With its simple layout, rich wavetable/waveform content and inspiring factory presets library, designing new sounds with SynthMaster One iOS is a joy. SynthMaster One iOS is feature wise identical to the desktop version except the following: * 16 voice polyphony (32 for the desktop version) * Comes with 650 presets (1250 for the desktop version) FEATURES * Universal App: SynthMaster One is now a universal standalone/AUv3 synth app running on iPhone 7 and above. * 650 Factory Presets: SynthMaster One iOS comes with inspiring factory presets from a world class team of sound designers: Arksun, Aiyn Zahev, BigTone Studios, Brian Transeau, Bluffmunkey, Bulent Biyikoglu, Gercek Dorman, Dejavu Sound, Fragment Audio, Kurt Ader, Mirko Ruta, Nori Ubukata, Rob Lee, Ufuk Kevser, Selcuk Ergen, The Machine, Vandalism Sound, Venus Theory, Vorpalsound and Xenos Soundworks * AUv3: SynthMaster One iOS supports AudioUnits V3, allowing multiple instances to run under supporting DAW apps like GarageBand, Cubasis or Beat Maker. * Files App Integration: Easily import/export presets, waveforms or scales using the common file browser UI (requires iOS 11+). * Real-time Modulation Feedback: See in real-time how modulation sources and targets change. This is a very helpful feature when designing sounds! * Cross Platform Cloud Synchronization: Easily synchronize your SynthMaster One related data across multiple platforms (Windows, MacOS, iPad, iPhone) * Semi-Modular Architecture: For each SynthMaster One instance, there are 2 oscillators with 2 sub oscillators, 2 Filters, 4 ADSR Envelopes, 3 LFOs, a powerful 16 step arpeggiator/sequencer and also 11 different effects that can be inserted on to 6 FX insert slots. The sub oscillators can be connected to the oscillators in 5 different modes which let you use it as a regular sub oscillator or do complex modulations such as ring modulation, amplitude modulation, phase modulation or frequency modulation. * 32 Step Arpeggiator/Sequencer: The arpeggiator in SynthMaster One features classic arpeggiator modes such as Up, Down, UpDown, DownUp, UpDown2, DownUp2, AsPlayed as well as Sequence, Chord and Arpeggiate modes. * Wavetable Synthesis: SynthMaster One implements true wavetable synthesis which opens up new possibilities for sound design. It comes with a rich content library with hundreds of waveforms and wavetables. * Stereo Oscillators with up to 16 voices Unison: Each of the 2 oscillators in SynthMaster One have stereo output, and can have up to 16 voices "unison". Using the "voices", "voices mix", "detune curve", "detune spread", "pan stread", "tone spread" and "phase spread" parameters, each oscillator can generate a rich "supersaw" type sound. * Zero Delay Feedback Filters: All of the 4 filter categories in SynthMaster One are developed using the zero delay feedback filter technology. With advanced filter parameters like input gain, drive, acid, filter nonlinearities and up to 4 times oversampling you can get that "analog" sound from the filters! * Rich Set of Effects: SynthMaster One features 11 different effect types: Distortion, LoFi, Ensemble, Phaser, 6 Band EQ, Compressor, Vocoder, Delay, Chorus, Tremolo, Reverb. * Microtuning: SynthMaster One supports Scala tuning, so tuning can be set either for each preset or globally by loading from a Scala tuning file. SynthMaster One comes with 300+ scales ranging from 5 note equal tempered scales to 12 note alternate tuning scales. * Preset Browser: SynthMaster One features a comprehensive preset browser with separate search criterias for instrument type, preset attributes, music style or preset author. SUPPORTS * All 64-bit iPad devices * AUv3 Audio Unit Extensions * Note-per-channel MIDI controllers (MPE) * Ableton Link * Bluetooth LE MIDI Controllers * AirDrop
Screenshots
Verdict
The clearest difference is in-app purchases: Addictive Synth at none against SynthMaster One's 11. Addictive Synth also leads on review sentiment (78% vs 64%) and price ($6.99 vs $9.99). SynthMaster One's advantage is ratings volume (743 vs 15) and rating (4.7 vs 4.5). On update cadence and ads 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
Addictive Synth costs $6.99 and SynthMaster One $9.99 up front. SynthMaster One sells 11 one-off in-app purchases. Addictive Synth asks for nothing beyond the download.
SynthMaster One holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: SynthMaster One has 743 ratings behind it against 15, so its average is the more settled of the two. Written reviews complicate that: 78% of Addictive Synth's written reviews are positive against 64% of SynthMaster One's, so the app with the better star average is not the one people write more warmly about.
Addictive Synth ships an update every 4 months, SynthMaster One every 2 months. The most recent releases landed on September 29, 2026 and October 14, 2026 respectively.
| Parameter | Addictive Synth | SynthMaster One |
|---|---|---|
| Price | $6.99 — better | $9.99 |
| Rating | 4.5 (15 ratings) | 4.7 (743 ratings) — better |
| Positive reviews | 78.1% of reviews — better | 63.8% of reviews |
| Number of ratings | 15 | 743 — better |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 6.0 — better | 10.0 |
| Further details — not scored | ||
| Size | 47 MB | 402 MB |
| Age rating | 4+ | 4+ |
| Developer | Harry Gohs | KV331 Audio |
Customer experience
Addictive Synth
SynthMaster One
User reviews
Addictive Synth
From 15 App Store ratingsWhat we love
- 🎵 Unique additive synthesis sound palette
- 🎛️ Intuitive and clean interface design
- 🎲 Randomizer/dice feature for creative exploration
- 🎹 Excellent arpeggiator with extensive customization
- ✏️ Ability to draw custom waveforms and filters
Room to improve
- 🔊 Harsh, metallic, or shrill sound character
- 🐛 Crashes on certain iOS versions
- ⏱️ Tempo drift and synchronization issues
- 🎹 Small, difficult-to-use on-screen controls
- 📡 Poor MIDI latency and responsiveness
SynthMaster One
From 743 App Store ratingsWhat we love
- 🚀 Powerful synth engine
- 👍 Extensive preset library
- 🎨 Versatile sound design capabilities
- 💡 Free desktop version expansions on iPad
- 🎹 Excellent sound quality and tone
Room to improve
- 🐛 Crashes and stability issues
- 🔋 Battery drain in background
- 🤔 Confusing in-app purchase system
- 👎 UI/UX could use improvement
- 🔇 Audio issues and no sound
Bugs and requests
Addictive Synth
Reported bugs
13 issues- App crashes upon opening on iOS 15.1
- Static/audio glitches on startup
- Keyboard width inconsistency across pages
- Stuck notes with external MIDI controllers
- Audio playback at 2x speed when pasting from certain apps
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- Backing track audio silences when switching apps
- Recording menu doesn't allow selection of new recordings
- Monophonic playback over virtual MIDI with chords
- Keyboard lag behind keystrokes
- Oscillator phase inconsistency
- Fundamental sine wave audible even when all harmonics disabled
- Flaky sequence saving functionality
- App crashes during audio recording/export
Requested features
19 requests- MIDI learn functionality
- Audiobus and IAA sync support
- MIDI clock/start/stop synchronization
- Ableton Link integration
- White/pink noise generator
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- Better patch/preset organization and banking
- Undo button for waveform/filter drawing
- WiFi and email export options
- Improved recording with flexible bar counts
- Drawable modulation signals
- Traditional filter types (LPF, HPF, BPF)
- MIDI volume control (CC7)
- Metronome on/off toggle
- Better visualization of harmonics/partials
- Evenly spaced harmonic controls
- Click track during looping
- Tempo saving with presets
- More modulation options and FM synthesis
- Hardware synth versions
SynthMaster One
Reported bugs
4 issues- Stuck notes and MIDI issues
- Preset loading crashes
- Restore purchases not working
- Incompatibility with certain DAWs
Requested features
4 requests- Add custom wavetable support
- Improve MIDI mapping and MPE functionality
- Optimize performance on older devices
- Streamline preset management and browsing
In-app purchases
Addictive Synth
No in-app purchases
SynthMaster One
- BigTone Club Construction Set$4.99
- True Trance Sounds Volume 1$4.99
- Vandalism Future House$4.99
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- NatLife Retrowave Sounds Vol.1$4.99
- Demis Hellen Euphoric Trance$4.99
- Venus Theory Trap Sounds$4.99
- Vandalism Shocking Future Bass$4.99
- NatLife Progressive&Deep Vol.1$4.99
- Bluffmunkey Cinematic Sounds$4.99
- Desktop Presets Upgrade$7.99
- SM One Expansions Bundle$24.99
Questions
Is Addictive Synth free?
Is SynthMaster One free?
Which has better reviews, Addictive Synth or SynthMaster One?
Do Addictive Synth or SynthMaster One have ads?
Which is updated more often, Addictive Synth or SynthMaster One?
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