Comparison

Sunrizer synth vs Krill Synthesizer

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

Krill Synthesizer

This virtual analog polyphonic synthesizer offers a streamlined interface for creating quick synth sounds on iPad. It features two oscillators, an LFO, a low-pass filter, two envelopes, and stereo effects, all accessible from a single screen.

Highlights
  • Virtual analog polyphonic synthesizer
  • Single-screen interface
  • Two oscillators
  • One LFO
  • Low-pass filter
  • Stereo chorus and ping-pong delay
  • 64 presets
Features
Read full description

The GSi Krill Synthesizer was born from a design originally conceived to work as a mono synthesizer on an embedded processor (RP2040), then it was modified to be polyphonic for a more powerful processor (ARM H7) and finally we thought it would be perfect as a AUv3 for iPad, for those quick and dirty synth sounds you sometimes need without getting lost in endless parameter navigation and menu diving. So here it is, just one screen, one knob - one function, what you see is what you get. Two oscillators, one LFO, one low pass filter, two envelopes, stereo chorus, ping-pong delay, 64 presets. Have fun!

Screenshots

Sunrizer synth3 screens
Krill Synthesizer1 screens

Verdict

The call

The clearest difference is update cadence: Krill Synthesizer at weekly against Sunrizer synth's every 6 months. Krill Synthesizer also leads on rating (5.0 vs 4.7) and review sentiment (100% vs 88%). Sunrizer synth's advantage is ratings volume (183 vs 6). On ads, in-app purchases, monetization model 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 Krill Synthesizer $11.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Krill Synthesizer holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Sunrizer synth has 183 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 88% of Sunrizer synth's written reviews are positive against 100% of Krill Synthesizer's.

UpkeepUpdate frequency

Sunrizer synth ships an update every 6 months, Krill Synthesizer weekly. The most recent releases landed on September 29, 2026 and August 26, 2026 respectively.

Scorecard5 real differences · 5 level
Sunrizer synth versus Krill Synthesizer: the parameters behind the verdict, then further details
ParameterSunrizer synthKrill Synthesizer
Price$12.99$11.99 — better
Rating4.7 (183 ratings)5.0 (6 ratings) — better
Positive reviews87.8% of reviews100.0% of reviews — better
Number of ratings183 — better6
Update frequencyEvery 6 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.3 — better11.0
Further details — not scored
Size28 MB8 MB
Age rating4+4+
DeveloperBeepStreetGenuine Soundware

Customer experience

Sunrizer synth

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

Krill Synthesizer

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Krill Synthesizer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Sunrizer synth

No in-app purchases

None

Krill Synthesizer

No in-app purchases

Questions

Is Sunrizer synth free?
Sunrizer synth costs $12.99, with no in-app purchases.
Is Krill Synthesizer free?
Krill Synthesizer costs $11.99, with no in-app purchases.
Which has better reviews, Sunrizer synth or Krill Synthesizer?
Krill Synthesizer is rated higher. Sunrizer synth averages 4.7 out of 5 from 183 ratings, while Krill Synthesizer averages 5.0 from 6 ratings.
Do Sunrizer synth or Krill Synthesizer have ads?
Neither Sunrizer synth nor Krill Synthesizer shows ads.
Which is updated more often, Sunrizer synth or Krill Synthesizer?
Sunrizer synth ships an update every 6 months, and Krill Synthesizer weekly. Most recently, Sunrizer synth was updated on September 29, 2026 and Krill Synthesizer on August 26, 2026.

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