RealPhase vs GSiRotary
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
Read full descriptionHide full description
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
GSiRotary
This AUv3 plugin emulates the iconic sound of Leslie rotary speakers for iPad. It offers detailed control over speeds, ramp times, balance, and microphone placement, along with built-in tube overdrive and reverb. Achieve authentic vintage speaker tones with low CPU impact.
- AUv3 plugin for compatible host apps
- Emulates Leslie tube models (122, 147, etc.)
- Adjustable speeds for upper and lower speakers
- Adjustable ramp up and down times
- Adjustable balance between speakers
- Adjustable microphone position
- Built-in tube overdrive and digital reverb
Read full descriptionHide full description
Please note: this is an AUv3 plugin that can be used with compatible host Apps. GSiRotary for iPad is the portable version of the very same Rotary Speaker algorithm found in the software GSi VB3-II and in the hardware keyboards Crumar Mojo (Classic and Suitcase), Mojo Desktop, Mojo 61 as well as in the GSi Gemini. As a Rotary Speaker effect it reproduces the effect and the tonal characteristics of the famous Leslie speakers, specifically the tube models 122, 147, 142, 145 and 251. It's not based on one single model, because there's actually very little difference between these models. Changing some parameters can make it sound more like a model or more like another one, letting alone the fact that even two or more apparently identical Leslies of the same model would not sound really identical after more than 60 years. GSiRotary takes this into account and offers a parameter set that can help us reach the rotary speaker sound we have in mind. Main features: - very low impact on CPU and RAM - adjustable speeds for upper and lower speakers separately - adjustable ramp up and down times - adjustable balance between upper and lower - adjustable microphone position (angle and distance) - built-in tube overdrive and digital reverb - comes as AUv3 plugin - supports background audio
Screenshots
Verdict
The clearest difference is rating: RealPhase at 5.0 against GSiRotary's 3.7. RealPhase also leads on price ($14.99 vs $19.99) and review sentiment (100% vs 80%). On ratings volume, update cadence, ads and in-app purchases 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 GSiRotary $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
RealPhase holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews point the same way: 100% of RealPhase's written reviews are positive against 80% of GSiRotary's.
RealPhase ships an update every 14 months, GSiRotary every 17 months. Both last shipped on October 24, 2026.
| Parameter | RealPhase | GSiRotary |
|---|---|---|
| Price | $14.99 — better | $19.99 |
| Rating | 5.0 (5 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 100.0% of reviews — better | 80.0% of reviews |
| Number of ratings | 5 — better | 3 |
| Update frequency | Every 14 months — better | Every 17 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 12.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | quantovox | Genuine Soundware |
Customer experience
RealPhase
GSiRotary
In-app purchases
RealPhase
No in-app purchases
GSiRotary
No in-app purchases









