Comparison

HarmonyAngel vs RAUSI

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

Head to head
About

HarmonyAngel

Features
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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 the same 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. Choose a Jazz Soli style when you need arranged ensemble-style lines instead of simple chord stacking. Built-in Bebop, Smart Soli, Smooth Big Band, Functional Jazz, Barry Harris, Cool Jazz, Quartal Fusion, Minimal Guide Tones, and Altered Dominant styles use the active chord, melody direction, and musical register to produce practical voicings. Premium users can create, validate, import, export, and organize declarative custom styles in the Jazz Soli Library. Use it 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 - Jazz Soli styles for melody-aware, multi-part jazz voicings - Premium Jazz Soli Library authoring with validated import and export for custom styles - One-page or two-page MIDI control channel slot switching - Progression controls for stepping through saved chord sequences - Full or partial on-screen piano with touch velocity and aftertouch - Harmony count, root alignment, skip-first-harmony, and revoice-on-switch controls - Delta or ratio harmony velocity and aftertouch shaping - 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 MIDI input/output port selection and virtual MIDI output port - Hold and panic controls with process/bypass hold modes - 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

About

RAUSI

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RAUSI is a dual-circuit high-gain distortion processor for iPhone and iPad. Use it as a standalone audio app or insert the included AUv3 effect in a compatible host such as GarageBand. FLOE and CRAG provide two contrasting distortion personalities inside one front panel. FLOE leans toward dense, abrasive wall-like saturation, while CRAG provides a tighter voice with deeper active EQ control for focused riffs and deliberate placement. FEATURES - FLOE and CRAG distortion modes - Adjustable Input, Drive, and Output - Active Low, Mid, High, and Mid Frequency controls - Selectable 9V / 18V headroom and saturation behavior - Instrument and line input modes - 2x and 4x oversampling modes - Standalone iOS/iPadOS app - AUv3 audio effect for compatible hosts TRY BEFORE UNLOCKING The working release model assumes 10 minutes of full-featured active use, shared between the standalone app and AUv3 extension. A one-time, non-consumable In-App Purchase unlocks unlimited use in both formats, with Restore Purchases available in the standalone app. Confirm this behavior in the production build before submission. RAUSI is designed for guitars, bass, synthesizers, drums, and parallel processing that need strong attack, dense harmonic weight, and controllable high-gain tone shaping.

Screenshots

HarmonyAngel4 screens
RAUSI2 screens

Verdict

The call

HarmonyAngel and RAUSI are too close to call on the numbers: across 5 compared parameters โ€” price, ads, in-app purchases and device support among them โ€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. HarmonyAngel sells 4 in-app purchases, starting at $0.99 per 7 days and RAUSI sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
HarmonyAngel versus RAUSI: the parameters behind the verdict, then further details
ParameterHarmonyAngelRAUSI
PriceFreeFree
Update frequencyEvery 4 weeksโ€”
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.0 โ€” better
Further details โ€” not scored
Size7 MB34 MB
Age rating4+4+
DeveloperBetter World StudioShoma Kondo

In-app purchases

4 purchases

HarmonyAngel

Subscriptions3
  • Weekly Subscription3 Days trial$0.997 Days
  • Monthly Subscription7 Days trial$1.991 Month
  • Yearly Subscription14 Days trial$9.991 Year
One-time1
  • Life-time Purchase$19.99
1 purchases

RAUSI

One-time1
  • RAUSI Full Version$6.99

Questions

Is HarmonyAngel free?
HarmonyAngel is free to download, with in-app purchases available.
Is RAUSI free?
RAUSI is free to download, with in-app purchases available.
Do HarmonyAngel or RAUSI have ads?
Neither HarmonyAngel nor RAUSI shows ads.

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