MeloVox vs Harmony Chack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MeloVox
This app generates up to five simultaneous vocal harmonies with advanced formant preservation for natural-sounding results. It offers automatic harmony generation or precise MIDI control, along with built-in effects like a noise gate, doubler, EQ, and reverb.
- Up to 5 simultaneous harmonies
- Formant preservation
- Automatic harmony generation
- MIDI control for harmonies
- Built-in noise gate
- Vocal doubler, EQ, and reverb
- Preset manager and Set List
Read full descriptionHide full description
MeloVox is an AUv3 vocal harmoniser designed to allow up to 5 simultaneous harmonies. You can either choose to have MeloVox automatically generate harmonies by listening to live input and creating harmonies based on the pitch of the incoming vocal, or you can use MIDI input to choose how to pitch the harmonies. You can choose from one of two algorithms, one more suitable to vocals which includes formant preservation, and another more traditional option for instruments. Unlike many pitch shifters, MeloVox is build on a phase vocoder capable of formant preservation, meaning much more natural sounding vocal harmonies. This is especially noticeable when pitching a vocal up an octave, which results in what is often called the Mickey Mouse effect. This is due to the fact that all frequencies are transposed up, along with the respective peaks in harmonics. This results in a sound which the vocal tract is incapable of producing, so it no longer sounds like a natural voice. MeloVox fixes this issue by preserving the formants. MeloVox is capable of producing up to 5 additional harmonies on top of the original vocal, and how it does that is down to the control mode setting. There are 5 different modes to choose from including Auto Sense, Fixed Pitch and three MIDI controllable modes called Chords, Melody and Vocoder. Auto Sense mode detects the frequency of the incoming vocal, and automatically harmonises using the specified key and scale. Fixed Pitch allows you to specify fixed offsets in a scale without the need to detect pitch. Chord and Melody modes use incoming MIDI data to precisely control the harmonies using MIDI notes from your master keyboard or DAW. And to top if off we have a traditional 12 band Vocoder which is incredibly easy to setup and use due to its internal carrier source. MeloVox includes a build in noise gate to remove unwanted background noise that helps with pitch tracking, and a vocal doubler which adds a spacious stereo effect to any monophonic vocal. MeloVox also features a 10 Band EQ add a reverb. All effects can be applied to either the original vocal or just the harmonies. A built in preset manager helps organize presets into categories using drag and drop, and the Set List can be created to provide quick real-time switching between presets and snapshots during a live session. You can even add your own acappella vocals to test out your presets as you create them. Features: ○ Up to 5 simultaneous harmonies. ○ Two different pitching algorithms. ○ Formant preservation. ○ 12 Band Vocoder. ○ Adjust the timbre of a vocal in formant mode. ○ Auto harmony mode. ○ MIDI control (CHORD and MELODY modes). ○ Build in noise gate. ○ Vocal doubler, EQ, Noise Gate and reverb. ○ Supports drag and drop of presets. ○ Preset manager. ○ Set List. ○ Output Monitor. ○ Definable colour schemes. ○ Drag and drop copying of presets. ○ Vocal Previews. ○ Easy backup of user created content.
Harmony Chack
Read full descriptionHide full description
Hear the harmony that's in your head — and find out whether it actually works. You don't need an instrument. Play it on the on-screen keyboard, stack the parts, and listen. WHAT IT'S FOR - Adding a harmony line to a guitar solo - Working out how to voice a string arrangement - Saving a chord progression before you forget it - Thinking it through on headphones, anywhere WHAT YOU CAN DO Lay down chords The seven chords that fit your key are right there — tap to place one. Or build your own from a root, accidental, 7th, sus4 and tensions. Slash chords are supported. Common progressions like II-V-I and the blues can be dropped in whole. Stack up harmonies Record straight from the on-screen keyboard, up to four harmony parts. Each part has its own color, so you can see at a glance which note belongs where. Set the volume of each part, or hide one for a moment. Fix it afterwards Grab a recorded note and move it. Change its pitch, shorten it, delete it. No need to play the part again. Quantize to 16ths and other grids. Check it while it plays Play along with a click, drums and chord backing. Change the tempo and time signature, and loop a fixed number of bars so you can hear the same spot over and over. See it your way Switch between staff notation and piano roll. Zoom in horizontally for fine timing, or out vertically to see a wider range. Keep it Save what you build as a song, name it, and reorder your list. FREE Up to 8 bars, and two rock rhythms. Building chords, four harmony parts, recording and editing are all free. PREMIUM (one-time purchase) Unlocks all 16 bars and adds jazz, bossa nova, samba and techno rhythms. Pay once — nothing further. Note: the app is designed for landscape. Works on both iPhone and iPad.
Screenshots
Verdict
The clearest difference is price: Harmony Chack at Free against MeloVox's $14.99. MeloVox's advantage is in-app purchases (none vs 1) and chart position (#193 vs unranked). On update cadence, ads and device support 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
Harmony Chack is free to download; MeloVox costs $14.99 up front. Harmony Chack sells 1 one-off in-app purchase. MeloVox asks for nothing beyond the download.
Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 27, 2026 and October 15, 2026 respectively.
| Parameter | MeloVox | Harmony Chack |
|---|---|---|
| Price | $14.99 | Free — better |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Fortnightly | Fortnightly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Best chart rank | #193 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13 — better | 16.0 |
| Further details — not scored | ||
| Size | 22 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | 4Pockets.com | Hironori Karube |
In-app purchases
MeloVox
No in-app purchases
Harmony Chack
- プレミアム$0.99
Questions
Is MeloVox free?
Is Harmony Chack free?
Do MeloVox or Harmony Chack have ads?
Which is updated more often, MeloVox or Harmony Chack?
Other comparisons















