Crystals Harmonizer® vs MF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
MF
This app recreates a classic analog delay effects pedal for digital use. It offers warm, organic sound textures with modern flexibility, processing various audio sources like guitars, vocals, and synthesizers.
- Classic analog delay recreation
- Warm, organic sound textures
- Dual-range delay times (40ms-800ms)
- Tempo synchronization
- Extensive time modulation
- AUv3 effects plugin
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The MF-104S Analog Delay is a re-invention of Moog Music’s classic Moogerfooger MF-104 analog effects pedal. The MF-104 Analog Delay, introduced in 2000, added a lush, all-analog delay to the classic line of Moogerfooger effects. It incorporated a dual-range Bucket Brigade Device (BBD) providing a range of delay times from 40 milliseconds to 800 milliseconds. Later versions of the MF-104 offered tempo synchronization, and extensive time modulation options via a multi-waveform LFO. Designed by Bob Moog and his engineering team, the MF-104 was a direct descendant of the original Moog modular synthesizers, adapted to process, modulate, and play with inputs ranging from guitar, voice, and synthesizer to any imaginable audio source. The MF-104 Analog Delay has been meticulously recreated as the MF-104S, capturing all of the warm, organic texture and character of the original analog delay circuitry, while adding 21st-century flexibility and ease of use. The MF-104S is an AUv3 effects plug-in that requires a compatible host or DAW to function.
Screenshots
Verdict
The clearest difference is review sentiment: Crystals Harmonizer® at 92% against MF's 0%. MF's advantage is rating (5.0 vs 4.6) and update cadence (monthly vs every 3 months). On price, 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
Crystals Harmonizer® costs $14.99 and MF $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MF holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 20 and 11 respectively. Written reviews complicate that: 92% of Crystals Harmonizer®'s written reviews are positive against 0% of MF's, so the app with the better star average is not the one people write more warmly about.
Crystals Harmonizer® ships an update every 3 months, MF monthly. Both last shipped on October 24, 2026.
| Parameter | Crystals Harmonizer® | MF |
|---|---|---|
| Price | $14.99 | $14.99 |
| Rating | 4.6 (20 ratings) | 5.0 (11 ratings) — better |
| Positive reviews | 92.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 20 — better | 11 |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 | 11.0 |
| Further details — not scored | ||
| Size | 15 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Eventide | Moog Music Inc. |
Customer experience
Crystals Harmonizer®
MF
In-app purchases
Crystals Harmonizer®
No in-app purchases
MF
No in-app purchases









