RealPhase vs Krill Synthesizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RealPhase
This app faithfully reproduces the sound of a legendary analog phaser pedal. It offers advanced modulation options, including barberpole effects and MIDI sync, for creating complex and rhythmic phasing sounds. Visualize real-time frequency response and enjoy exceptional multirate performance.
- Faithful reproduction of legendary phaser pedal
- Composite LFOs and parallel phaser structures
- Barberpole/Shepard phasing
- Rhythmic pattern creation with LFO ratios
- Mid-Side modes for stereo phasing
- Real-time notch filter frequency visualization
- MIDI note event reception for sync
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Do you remember the single most iconic phaser you've ever heard? For the first time, there's a good chance of finding that exact sound captured in a plugin. FEATURES: • Faithful reproduction of a legendary 4-stage phaser pedal from the late 70's - early 80's • Complex effects can be built using composite LFO's, parallel phaser structures, as well as an independent modulation system for the sweep range • Barberpole or "Shepard" phaser included: infinitely rising / falling modulation that can optionally be combined with sweep range modulation • Strong, rhythmic / syncopated patterns can be created by configuring different LFO frequency ratios within the various modulation sources • Mid-Side modes allow adding special phasing effects to stereo sounds • Exact visualization of the notch filters' real-time frequency response, with different stereo options • Exceptional multirate performance: results are less sampling rate-dependent than what's currently available with most digital phasers (even from major manufacturers) • Designed to be an anthology app extensible with additional hardware-based or synthetic analog models in future MIDI NOTE EVENT RECEPTION: RealPhase can accept MIDI note messages, syncing an envelope-based modulation source to note on and off events. This makes it easy to use RealPhase as a powerful analog modeling OTA-based resonant notch filter with any synth or sampler. PLEASE NOTE: • An Audio Unit v3 compatible host app is required to use this plugin • Supported sampling rates: 44.1, 48, 96 kHz
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.
- Virtual analog polyphonic synthesizer
- Single-screen interface
- Two oscillators
- One LFO
- Low-pass filter
- Stereo chorus and ping-pong delay
- 64 presets
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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
Verdict
The clearest difference is update cadence: Krill Synthesizer at weekly against RealPhase's every 14 months. Krill Synthesizer also leads on price ($11.99 vs $14.99). On rating, review sentiment, ratings volume 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
RealPhase costs $14.99 and Krill Synthesizer $11.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for RealPhase against 5.0 for Krill Synthesizer. Both are backed by a comparable volume of ratings — 5 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
RealPhase ships an update every 14 months, Krill Synthesizer weekly. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.
| Parameter | RealPhase | Krill Synthesizer |
|---|---|---|
| Price | $14.99 | $11.99 — better |
| Rating | 5.0 (5 ratings) | 5.0 (6 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 5 | 6 — better |
| Update frequency | Every 14 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 12.1 | 11.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | quantovox | Genuine Soundware |
Customer experience
RealPhase
Krill Synthesizer
In-app purchases
RealPhase
No in-app purchases
Krill Synthesizer
No in-app purchases









