Comparison

RealPhase vs 501 Chorus Echo

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

Head to head
About

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.

Highlights
  • 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
Features
Read 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

About

501 Chorus Echo

This audio plugin meticulously models the iconic Roland RE-501 Chorus Echo, offering authentic analog warmth with modern digital flexibility. It provides producers with classic tape delay, BBD chorus, and spring reverb sounds, enhanced by DAW tempo sync and expanded controls for any music genre.

Highlights
  • Authentic analog sound reproduction
  • Extended creative control with DAW sync
  • Intuitive user interface
  • Versatile for any music genre
  • Independent SOS timings
  • Linear preamp option
Features
Read full description

"Legendary Analog Warmth: Authentic Spring Reverb, Classic Tape Delay, and Lush BBD Chorus in a Cutting-Edge Plugin" Rediscover the iconic sound of the Roland RE-501 Chorus Echo*, now reborn as the NA 501 Chorus Echo plugin by Nembrini Audio. This meticulously modeled plugin captures the essence of the legendary tape echo, BBD chorus, and spring reverb, enhanced with modern digital functionality for today's music producers. Ideal for adding rich, analog textures to any genre, the NA 501 is a versatile tool for musicians and producers seeking that classic sound with contemporary flexibility. Key Features:: 1 - Authentic Sound Reproduction: Delivers the classic warmth and character of the Roland RE-501 through precise digital modeling. 2 - Extended Creative Control: Offers advanced features like DAW tempo sync, expanded chorus and delay parameters, and independent SOS timings. 3 - Intuitive User Interface: Designed for ease of use, blending vintage aesthetics with modern digital efficiency. 4 - Versatility for Any Genre: Whether you're producing rock, electronic, ambient, or beyond, the NA 501 fits seamlessly into any musical project. Equipped with features tailored for modern production, the NA 501 includes DAW tempo synchronization, a wide parameter range for the BBD chorus and analog tape delay, separate left and right SOS timings, and a linear preamp option. These technical enhancements ensure that the NA 501 not only emulates the classic sound but elevates it to new levels. Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect Legal Disclaimer: RE-501 Chorus Echo is a registered trademark of Roland Inc. NA 501 Chorus Echo was developed by Nembrini Audio SRL based on its modeling techniques. Roland has not endorsed nor sponsored the NA 501 Chorus Echo in any manner, nor licensed any intellectual property for use in this product.

Screenshots

RealPhase2 screens
501 Chorus Echo1 screens

Verdict

The call

The clearest difference is review sentiment: RealPhase at 100% against 501 Chorus Echo's 0%. RealPhase also leads on rating (5.0 vs 4.5) and iOS requirement (12.1 vs 15). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

RealPhase costs $14.99 and 501 Chorus Echo $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

RealPhase holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 5 and 8 respectively. Written reviews point the same way: 100% of RealPhase's written reviews are positive against 0% of 501 Chorus Echo's.

UpkeepUpdate frequency

RealPhase ships an update every 14 months, 501 Chorus Echo every 17 months. Both last shipped on October 13, 2026.

Scorecard3 real differences · 7 level
RealPhase versus 501 Chorus Echo: the parameters behind the verdict, then further details
ParameterRealPhase501 Chorus Echo
Price$14.99$14.99
Rating5.0 (5 ratings) — better4.5 (8 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings58 — better
Update frequencyEvery 14 months — betterEvery 17 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS12.1 — better15
Further details — not scored
Size8 MB23 MB
Age rating4+4+
DeveloperquantovoxNembrini Audio

Customer experience

RealPhase

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

501 Chorus Echo

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

RealPhase

No in-app purchases

None

501 Chorus Echo

No in-app purchases

Questions

Is RealPhase free?
RealPhase costs $14.99, with no in-app purchases.
Is 501 Chorus Echo free?
501 Chorus Echo costs $14.99, with no in-app purchases.
Which has better reviews, RealPhase or 501 Chorus Echo?
RealPhase is rated higher. RealPhase averages 5.0 out of 5 from 5 ratings, while 501 Chorus Echo averages 4.5 from 8 ratings.
Do RealPhase or 501 Chorus Echo have ads?
Neither RealPhase nor 501 Chorus Echo shows ads.
Which is updated more often, RealPhase or 501 Chorus Echo?
RealPhase ships an update every 14 months, and 501 Chorus Echo every 17 months. Most recently, RealPhase was updated on October 13, 2026 and 501 Chorus Echo on October 13, 2026.

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