Comparison

Analog Rack Tremolo vs Crystals Harmonizer®

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

Head to head
About

Analog Rack Tremolo

This audio effect plugin emulates the sound of analog and digital tremolo pedals. It offers a simple yet powerful interface with a custom tube preamp circuit for unique signal coloration. Use it as a standalone app or within other music production software.

Highlights
  • Analog and digital tremolo emulation
  • Custom tube preamp circuit
  • Signal coloration
  • Standalone app
  • AudioUnit v3 effect
  • Inter-App Audio effect
Features
Read full description

Analog Rack Tremolo pretty simple and effective tremolo Fx plugin. Nembrini Audio has taken the guitarists most preferred analog and digital effect pedals and has repacked it in new rack style plugins easy to use and extremely powerful at the same time, with the addition of a custom design tube preamp virtual circuit which gives color to the signal in a very special way. Just insert the Analog Rack Tremolo plugin in your tracks to hear its beautiful analog tube coloration! Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect

About

Crystals Harmonizer®

This app offers advanced pitch shifting, delay, and reverb effects inspired by a classic hardware unit. Create expansive, modulated soundscapes for instruments and vocals, with real-time control over parameters.

Highlights
  • Twin reverse pitch shifters
  • Reverse granular delays
  • Real-time RIBBON control
  • Octave up FLEX button
  • Long decay reverb
  • Musical micro-pitching
  • Standalone and AUv3 plugin
Read full description

Eventide Crystals Harmonizer® combines twin reverse pitch shifters with reverse delays and reverb. This iconic H3000 effect can be used to create out-of-this-world climbing and cascading pitched delays or to create unique sounding reverbs. It features two reverse granular delays that can be manipulated by length and pitch. Crystals excels at adding life to boring synths, guitar, and vocals making them sound huge and majestic. From sound design to other-worldly solos, Crystals will spark inspiration. The innovative RIBBON control allows you to modulate many parameters at once. Manipulate the pitches to play it like an instrument or slowly increase feedback to make your signal explode into infinity. Need some extra gusto? Hold down the FLEX button to shift one octave up from the current pitch. Features: - Two pitch-shifters, each with a four-octave range from two octaves down to two octaves up. - Two independently adjustable delays, up to 4 seconds each, with their own individual feedback. - Reverb with 100 seconds of decay. - Make it musical by micro-pitching each voice around the 4th (500 cents), 5th (700 cents), or octave (1200 cents). - Smooth out delay grains by applying up to 4 seconds of delay for each voice. - RIBBON lets you ‘play’ the effect in real-time and provides dynamic and fluid control to morph back and forth between the settings of your choice. - FLEX shifts both voices up one octave at the push of a button. - MIXLOCK keeps MIX control constant as you audition presets. - Available as an Audio Units AUv3 plug-in and Standalone App.

Screenshots

Analog Rack Tremolo1 screens
Crystals Harmonizer®3 screens

Verdict

The call

The clearest difference is price: Analog Rack Tremolo at $3.99 against Crystals Harmonizer®'s $14.99. Analog Rack Tremolo also leads on rating (5.0 vs 4.6). Crystals Harmonizer®'s advantage is update cadence (every 3 months vs every 19 months) and iOS requirement (11.0 vs 15). On review sentiment, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Analog Rack Tremolo costs $3.99 and Crystals Harmonizer® $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Analog Rack Tremolo holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 7 and 20 respectively. Written reviews point the same way: 100% of Analog Rack Tremolo's written reviews are positive against 92% of Crystals Harmonizer®'s.

UpkeepUpdate frequency

Analog Rack Tremolo ships an update every 19 months, Crystals Harmonizer® every 3 months. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Analog Rack Tremolo versus Crystals Harmonizer®: the parameters behind the verdict, then further details
ParameterAnalog Rack TremoloCrystals Harmonizer®
Price$3.99 — better$14.99
Rating5.0 (7 ratings) — better4.6 (20 ratings)
Positive reviews100.0% of reviews — better92.3% of reviews
Number of ratings720 — better
Update frequencyEvery 19 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS1511.0 — better
Further details — not scored
Size26 MB15 MB
Age rating4+4+
DeveloperNembrini AudioEventide

Customer experience

Analog Rack Tremolo

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Crystals Harmonizer®

All ratings20 ratings
Positive90.0%
Neutral0.0%
Negative10.0%
Written reviews13 reviews
Positive92.3%
Neutral0.0%
Negative7.7%

In-app purchases

None

Analog Rack Tremolo

No in-app purchases

None

Crystals Harmonizer®

No in-app purchases

Questions

Is Analog Rack Tremolo free?
Analog Rack Tremolo costs $3.99, with no in-app purchases.
Is Crystals Harmonizer® free?
Crystals Harmonizer® costs $14.99, with no in-app purchases.
Which has better reviews, Analog Rack Tremolo or Crystals Harmonizer®?
Analog Rack Tremolo is rated higher. Analog Rack Tremolo averages 5.0 out of 5 from 7 ratings, while Crystals Harmonizer® averages 4.6 from 20 ratings.
Do Analog Rack Tremolo or Crystals Harmonizer® have ads?
Neither Analog Rack Tremolo nor Crystals Harmonizer® shows ads.
Which is updated more often, Analog Rack Tremolo or Crystals Harmonizer®?
Analog Rack Tremolo ships an update every 19 months, and Crystals Harmonizer® every 3 months. Most recently, Analog Rack Tremolo was updated on October 18, 2026 and Crystals Harmonizer® on October 24, 2026.

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