# HarmonyAngel — MIDI harmony processor

> MIDI harmony processor (iPhone/iPad app by Better World Studio.)

- Source: https://appshunter.io/ios/app/harmonyangel/id6794364693 (this page in markdown: same URL + `.md`)
- Developer: [Better World Studio](https://appshunter.io/developer/424394067)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: American English
- Released: 2026-07-30
- Data updated: 2026-08-16
- User reviews in markdown: https://appshunter.io/ios/app/harmonyangel/id6794364693/reviews.md

## What is HarmonyAngel?

HarmonyAngel is a MIDI and vocal harmony processor for musicians who want one monophonic line to follow the active chord.

Choose chord slots on two performance pages, then play from a MIDI controller or the on-screen piano. For every incoming note, HarmonyAngel can generate descending chord tones below it, align voicings to a chord root, preserve slash-chord roots, and forward aftertouch to the generated harmony.

Turn on Mic Input to sing into HarmonyAngel. The app performs low-latency monophonic pitch detection locally, uses the detected note to create chord-aware MIDI harmony, and provides a live tuner and input-level meter. Premium users can optionally hear pitch-corrected lead vocal and pitch-shifted vocal harmony audio, with selectable pitch detector, pitch shifter, formant, latency, buffer, trigger-level, and trigger-velocity controls.

Use HarmonyAngel standalone with CoreMIDI and the built-in sine synth, or load the AUv3 MIDI processor inside a compatible host. Page controls, progression stepping, hold behavior, custom chord types, selectable MIDI ports, channel routing, keyboard range, display transpose, and velocity shaping are available from the performance UI.

Highlights:
- Two pages of 12 editable chord slots with no-harmony slots
- Built-in chord types, slash roots, and named custom chord types
- Full or partial on-screen piano with touch velocity and aftertouch
- Mic Input with local monophonic vocal pitch detection, tuner, and input-level metering
- Premium pitch-corrected lead vocal and pitch-shifted vocal harmony audio
- Premium single-channel or rotating-channel harmony MIDI output
- Premium AUv3 MIDI processor extension with preservable host state
- Optional built-in sine wave synth for quick testing or standalone use

HarmonyAngel is designed for keyboardists, singers, composers, producers, worship musicians, live performers, and anyone who wants fast chord-aware harmony from simple MIDI or vocal input.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Privacy Policy: https://bwinnovationtw.github.io/apps/harmonyangel/privacy.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Weekly Subscription | $0.99 | per 7 days |
| Monthly Subscription | $1.99 | per month |
| Yearly Subscription | $9.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Life-time Purchase | $19.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2026-08-14

Refined premium subscription options: the weekly plan includes a three-day free trial; monthly and yearly plans have no free trial. Updated HarmonyAngel artwork.

### 1.0 — 2026-07-30

No release notes.

## More apps by Better World Studio

- [PianoAngel](https://appshunter.io/ios/app/pianoangel/id425359671)
- [Heavenly Chord Performer](https://appshunter.io/ios/app/heavenly-chord-performer/id6790610315)

All apps by Better World Studio: https://appshunter.io/developer/424394067

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-16.*