Comparison

Sunrizer synth vs Pure Acid

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

Head to head
About

Sunrizer synth

This virtual analog synthesizer offers a rich, warm sound with advanced features like SuperSaw emulation and morphing parameter control. It integrates seamlessly with MIDI hardware and sequencers, providing a professional-grade sound design experience on iOS.

Highlights
  • SuperSaw sound emulation
  • Dual filters with configurable routing
  • Morph Group for parameter control
  • CoreMidi and background audio support
  • Multi-mode oscillator multiplication
  • Microtuning support
Features
Read full description

"This really is the synth that keeps on giving! Inspiration and intuition truly blend together in this musical instrument." Alan Parsons Sunrizer Synth is a virtual analog synthesizer that takes the definition of iOS synthesizer to the next level. Thanks to carefully designed architecture and heavy usage of coprocessor it blurs the boundaries between iOS and hardware synthesizers. Sunrizer was built to perform and works perfectly with any MIDI keyboard or sequencer. A lot of research has been done in order to achieve unique character, warmth and clarity. HIGHLIGHTS · True SuperSaw sound emulation, first found in the legendary Roland JP-8000 synthesizer. SuperSaw is a layered waveform consisting of multiple saw waves which are detuned to create an extremely full and epic sound. · Two filters per voice with configurable routing. 16 filter types available, including less common like Comb, Formant or Frequency shifter. · The Morph Group function lets you continuously morph of up to 30 parameters in a sound (including effects), using only the modulation wheel. · Full support for CoreMidi, MIDI mapping, Virtual Midi Ports and background audio. · Multi mode lets you multiply oscillators to get unbelievably fat and full sound. · Support for microtuning - load scl and tun files. Create fascinating microtonal music which uses intervals not found in the Western system of 12 equal intervals to the octave. OSCILLATORS · 2 warm-sounding analog modelled oscillators, 2 sub-oscillators (except SuperSaw). Available waveforms: Saw, PWM pulse,Triangle, SuperSaw, FM (frequency of phase modulation). 6 oscillators per voice in multi-sono mode. · Oscillator 2 hard-sync and configurable routing · FM (true frequency modulation) and PM mode · Osc-mix, ring modulator · White noise oscillator FLEXIBLE MULTI FILTERS · Two independent filters per voice with configurable routing. Filter types: LPF, HPF, BPF, Analog LPF, Notch, Comb, All pass, Power LPF, Power BPF, Wave shaper, Resonator, Resampler, LPF+Resampler, Frequency shifter. · Configurable routing: serial or parallel with bypass option. · ADSR envelope, keyboard tracking and full LFO control. MODULATION · Two LFOs per voice. It's possible to assign each LFO to almost any parameter. 3 LFO running modes: trigger, 1 shot, global. 6 waveforms, phase and fade-in knobs. · The Morph Group function lets you continuously morph of up to 30 parameters in a sound (including effects), using only the modulation wheel. · Two Modulation ADSR Envelopes for amplitude and filters cutoff. · Pitch and modulation wheels. EFFECTS · A number of effects are built in: distortion, hi-q reverb, chorus, rotary speaker simulation, equalizer, phaser and stereo delay. Dual-band FX processing. ARPEGGIATOR · Sunrizer incorporates very powerful programmable arpeggiator. You should think of it more like a small step sequencer. OTHER FEATURES · Over 380 presets, 7 additional banks available for FREE in web library (more coming soon) · Hold button allows you to to keep notes sustaining until you play new notes · With Chord Memory function you can play the chord by only pressing single keys · Phrase sequencer · Compatible with AudioBus · Adjustable polyphony: 6-20 voices · Playback modes: poly, solo, arp · Built-in recorder supporting AudioCopy, DropBox and iTunes file sharing. · Supports AUv3, MIDI, IAA, AudioBus 2.0 Visit www.beepstreet.com for user manual and audio demos. * Sunrizer is now available on Mac and PC, check our website for more info "Specs aside, the most important thing is the sound… and it’s great." musicradar.com "Sunrizer is the first truly mature polyphonic synth for the iPad, a real, smooth and powerful sounding option for all sorts of stage and studio performances." Mark Jenkins, author "Analog Synthesizers"

About

Pure Acid

This app is a high-quality bassline synthesizer and drum machine inspired by classic 80s hardware. It offers a retro analog sound with modern features for fast and fun music creation. Explore various genres with factory presets and create unique rhythms and basslines.

Highlights
  • AUv3, Ableton Link, AudioBus, IAA support
  • Classic bassline waveforms (Saw, Pulse)
  • Distortion and filter LFO effects
  • 32-step sequencer with pattern editing
  • 16 independent drum parts with customizable sounds
  • Realtime master effects with XY-pad
Read full description

Pure Acid is a top quality bassline synthesizer and drum machine in one app! Inspired by classic hardware bassline synthesizers and rhythm machines, which changed musical world back in 80's, like the legendary TB-303 synthesizer, TR-808 / 707 / 909 rhythm boxes and their numerous replicas, Pure Acid is designed to bring back the feeling of retro analog gear in every detail in terms of sound, as well as to provide new functions previously unavailable in the original devices to make your music creation workflow fast and fun! A large number of factory preset patterns will immerse you into an exciting world of Acid House, Techno, Hardcore and Big Beat music genres, which will inspire you to create your own basslines and rhythms for your compositions! You can use Pure Acid app as a ready-to-go realtime musical instrument (groove box) in your jam sessions together with Ableton Link to synchronize it with the rest of your music gear. Its bassline editing system and randomization options will be handy to create unique groovy basslines easily. Realtime master effects with XY-pad controls can add expression to your live performance. You can also use Pure Acid with AudioBus, AUM or other IAA-supporting apps to create complex and interesting sound setups. Features: • supports AUv3, Ableton Link, AudioBus, Inter-App Audio, Core Midi, Virtual Midi In/Out, Bluetooth Midi • AudioBus state saving support • 64-bit sound engine • Midi Learn • Export to midi file • includes Multiple Output AUv3 plugin with 6 audio output busses Bassline Section: • 2 classic bassline waveforms: Saw and Pulse • classic knobs: Tune, Cutoff, Resonance, Env Mod, Decay and Accent • Distortion effect with amount, HPF and Boost knobs • filter LFO with rate and depth knobs Sequencer Section: • up to 12 bassline patterns can be stored in one preset • up to 32 steps per each bassline pattern • patterns can be chained together to create more complex patterns • pattern Tempo and Swing parameters • Gate parameter, which allows you to adjust bass note lengths • Pattern Editor allows you to copy, transpose patterns, shift notes left/right, insert or delete a note, variate (randomize all note properties expect pitch), shuffle (randomize notes order only), reverse and compose patterns using Bassline Composer function • onscreen keyboard allows you to enter bassline notes in a comfortable way. You can also record basslines in realtime. Drums Section: • 16 independent drum parts • 35 different classic drum sounds with ability to tune your own drum kit • each drum part sound has its own parameters: Tune, Decay, Attack/Snap/Color, FX A send, FX B send, Boost, Pan, Level • up to 12 drum patterns and 4 drum fill patterns per preset • 16 steps per each drum pattern, with ability to add 16 "backbeat" steps between main steps (32 steps per drum pattern in total) • patterns can be chained together to create more complex patterns • Swing and Flam features • Total Accent part with adjustable total accent value can give you ability to "highlight" specific steps in your drum pattern • new: step conditions for drum steps Mixer Section: • 2 mixer channels: Bassline and Drums • Drive effect for each channel • 2 send effect pedals: FX A and FX B • 14 send effect types • send effect can be routed to either master output, MFX or another send effect (FX A -> FX B), which allows to chain several effects one after another • MFX pedal with 22 effect types to choose from • FX A and FX B send amount knobs for each mixer channel • XY-pad on each effect pedal to control their parameters • Master Limiter effect to prevent sound clipping and more: • Unlimited number of user presets • 84 factory presets • Audio export to wav file (16, 24 or 32 bit) • Preset / Bank Share function • Selectable UI color schemes with ability to adjust colors manually • Can work either as a standalone app, or as AUv3 audio unit plugin • Designed for both iPad and iPhone

Screenshots

Sunrizer synth3 screens
Pure Acid4 screens

Verdict

The call

The clearest difference is in-app purchases: Sunrizer synth at none against Pure Acid's 2. Sunrizer synth also leads on price ($12.99 vs $14.99) and iOS requirement (10.3 vs 13.0). Pure Acid's advantage is update cadence (every 3 weeks vs every 6 months) and rating (4.9 vs 4.7). On review sentiment, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Sunrizer synth costs $12.99 and Pure Acid $14.99 up front. Pure Acid sells 2 one-off in-app purchases. Sunrizer synth asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Pure Acid holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 184 and 169 respectively. Written reviews point the same way: 88% of Sunrizer synth's written reviews are positive against 94% of Pure Acid's.

UpkeepUpdate frequency

Sunrizer synth ships an update every 6 months, Pure Acid every 3 weeks. Both last shipped on October 22, 2026.

Scorecard6 real differences · 4 level
Sunrizer synth versus Pure Acid: the parameters behind the verdict, then further details
ParameterSunrizer synthPure Acid
Price$12.99 — better$14.99
Rating4.7 (184 ratings)4.9 (169 ratings) — better
Positive reviews87.8% of reviews94.1% of reviews — better
Number of ratings184 — better169
Update frequencyEvery 6 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.3 — better13.0
Further details — not scored
Size28 MB44 MB
Age rating4+4+
DeveloperBeepStreetDmitrij Pavlov

Customer experience

Sunrizer synth

All ratings183 ratings
Positive90.2%
Neutral5.5%
Negative4.4%
Written reviews303 reviews
Positive87.8%
Neutral5.3%
Negative6.9%

Pure Acid

All ratings167 ratings
Positive97.0%
Neutral1.8%
Negative1.2%
Written reviews152 reviews
Positive94.1%
Neutral2.6%
Negative3.3%

User reviews

Sunrizer synth

From 184 App Store ratings

What we love

  • 🎨 Exceptional sound quality
  • 👍 Intuitive and easy-to-use interface
  • 🎹 Powerful and flexible synth engine
  • 💡 Excellent preset library
  • 🎚️ Comprehensive modulation and effects

Room to improve

  • 🐛 Occasional crashes and glitches
  • 🔌 Compatibility issues with certain DAWs
  • 🔇 Limited audio export options
  • 🧭 Confusing preset management

Pure Acid

From 169 App Store ratings

What we love

  • 🚀 Powerful and feature-rich
  • 👍 Intuitive and easy to use
  • 🎶 Excellent sound quality
  • 🎛️ Great sequencing and programming capabilities
  • 🔌 Seamless integration with other apps and hardware

Room to improve

  • 🐛 Occasional audio cutoff or sync issues
  • 🔍 Lack of detailed documentation or tutorials
  • 🔀 Limitations in pattern length and drum sequencing

Bugs and requests

Sunrizer synth

Reported bugs

3 issues
  • Synth freezes when loading certain presets
  • Inconsistent behavior when using multiple instances
  • Graphical issues on newer iPad models

Requested features

4 requests
  • Improved MIDI integration and control
  • Expanded arpeggiator and sequencing capabilities
  • More advanced sound design tools
  • Ability to save custom tunings

Pure Acid

Reported bugs

2 issues
  • GUI scaling issues on smaller devices
  • Crashes or freezes on certain devices

Requested features

4 requests
  • Ability to import MIDI files
  • Standalone drum machine mode
  • Expanded drum sample library
  • Knob/parameter automation recording

In-app purchases

None

Sunrizer synth

No in-app purchases

2 purchases

Pure Acid

One-time2
  • Ukrainian style color scheme$4.99
  • Ukrainian style app icon$4.99

Questions

Is Sunrizer synth free?
Sunrizer synth costs $12.99, with no in-app purchases.
Is Pure Acid free?
Pure Acid costs $14.99, and also offers in-app purchases.
Which has better reviews, Sunrizer synth or Pure Acid?
Pure Acid is rated higher. Sunrizer synth averages 4.7 out of 5 from 184 ratings, while Pure Acid averages 4.9 from 169 ratings.
Do Sunrizer synth or Pure Acid have ads?
Neither Sunrizer synth nor Pure Acid shows ads.
Which is updated more often, Sunrizer synth or Pure Acid?
Sunrizer synth ships an update every 6 months, and Pure Acid every 3 weeks. Most recently, Sunrizer synth was updated on October 22, 2026 and Pure Acid on October 22, 2026.

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