Crystals Harmonizer® vs volumeCTRL
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.
volumeCTRL
Gain precise control over your device's audio levels with this utility app. Adjust volume by percentage or dBFS, fine-tune with incremental steps, and temporarily dim or mute sound. Ideal for music, podcasts, and late-night media consumption.
- Precise volume adjustment by percentage or dBFS
- Keypad for exact value input
- Fine-tune volume with customizable step sizes
- Temporary dim and mute functions
- Seamless integration with device volume controls
- Universal app for iPhone, iPad, and iPod touch
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volumeCTRL is a simple utility that works alongside your iPhone/iPad’s built-in volume controls to give you precise control over its level. It is designed for anyone who needs or wants tighter, repeatable control over volume level. volumeCTRL lets you set the volume level using either Percent or dBFS (decibels from Full Scale). You can key in exact values with a handy on-screen keypad. Fine tune your setting using buttons which change the value in small steps. Dim or Mute the sound when you get interrupted temporarily. volumeCTRL is the perfect iPad Split View or Slide Over companion for listening to music, audiobooks, or podcasts. Use it with your favorite music app, such as Apple Music, Spotify, Qobuz, TIDAL Music, or Pandora. With volumeCTRL, you can get your late night listening level just right when you stream movies or TV shows while everything else is quiet. If you're picky about exactly how loud your device audio is, volumeCTRL is the right app for you. FEATURES - volumeCTRL lets you set your iPhone, iPad, or iPod touch volume precisely + New Favorite Volume options let you set preferred volumes for various listening cases - Selectable Units: Percent (%) or Decibels from Full Scale (dBFS) - Virtual Keypad allows you to key in exact values - Volume Up/Down Buttons let you change the volume in fine-grained 0.5 % or about 0.5 dB steps + New in Version 1.1 You can customize the step size - Dim and Mute Buttons let you temporarily lower the volume and easily get back to your previous level - Dim lowers the volume by a fixed amount (Customizable, Default: 18 dB) Super handy for quieting down loud commercials! - Mute silences the audio completely - volumeCTRL peacefully coexists with the device’s built-in volume controls — use either and the other follows seamlessly - Supports both Dark and Light Mode Appearances - Supports Hardware Keyboards connected to iPads - volumeCTRL is a Universal App - it works on iPad, iPhone, & iPod touch - User Guide embedded in App - no internet connection required to read it - auDSPr strives to design Apps for Everyone - Languages: All auDSPr audio apps support for 简体中文, Español, русский, 日本語, Français, Deutsch, Svenska, Latviešu - Accessibility Features - VoiceOver screen reader support assists visually impaired users APPLICATIONS - Setting impactful yet safe listening levels when using headphones or in-ear monitors - Setting repeatable reference volumes for studio control rooms or audiophile listening rooms - Setting precise levels for hearing aid intelligibility SYSTEM REQUIREMENTS - BUYER BEWARE: Some Bluetooth devices have coarse volume implementations (see picture above). The coarse hardware volume defeats volumeCTRL’s fine software volume setting and prevents performance from behaving optimally! - volumeCTRL is verified to work beautifully with Apple AirPods - Compatible with iOS 11.0 & up (iPhone 5S, iPhone SE (1st Generation), iPod touch (6th Generation) & up) - Compatible with iPadOS 11.0 & up (iPad (5th Generation), iPad Pro (1st Generation), iPad Air (1st Generation), iPad mini 2,& up)
Screenshots
Verdict
The clearest difference is price: volumeCTRL at $4.99 against Crystals Harmonizer®'s $14.99. Crystals Harmonizer®'s advantage is rating (4.6 vs 3.2) and review sentiment (92% vs 50%). On ratings volume, ads, in-app purchases and monetization model 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 volumeCTRL $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Crystals Harmonizer® holds the better App Store score, 4.6 against 3.2. Both are backed by a comparable volume of ratings — 20 and 9 respectively. Written reviews point the same way: 92% of Crystals Harmonizer®'s written reviews are positive against 50% of volumeCTRL's.
Crystals Harmonizer® ships an update every 3 months, volumeCTRL every 9 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.
| Parameter | Crystals Harmonizer® | volumeCTRL |
|---|---|---|
| Price | $14.99 | $4.99 — better |
| Rating | 4.6 (20 ratings) — better | 3.2 (9 ratings) |
| Positive reviews | 92.3% of reviews — better | 50.0% of reviews |
| Number of ratings | 20 — better | 9 |
| Update frequency | Every 3 months — better | Every 9 months |
| 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 | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Eventide | auDSPr |
Customer experience
Crystals Harmonizer®
volumeCTRL
In-app purchases
Crystals Harmonizer®
No in-app purchases
volumeCTRL
No in-app purchases
Questions
Is Crystals Harmonizer® free?
Is volumeCTRL free?
Which has better reviews, Crystals Harmonizer® or volumeCTRL?
Do Crystals Harmonizer® or volumeCTRL have ads?
Which is updated more often, Crystals Harmonizer® or volumeCTRL?
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