ThermVoltSilicon vs HarmonyAngel
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThermVoltSilicon
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ThermVoltSilicon is a precise digital recreation of classic silicon diode-based overdrive circuits. It delivers the tighter, brighter, and more articulate character typical of silicon clipping stages, while faithfully modeling analog imperfections such as power supply sag, battery voltage variation, and temperature-dependent diode behavior. Built with the MIT-licensed Patina DSP engine, this AUv3 plugin combines circuit-accurate modeling with modern features for both vintage tone enthusiasts and contemporary producers. FEATURES • Silicon diode clipping with realistic forward voltage and temperature response • Authentic power supply sag and voltage variation (9V / 18V modeling) • Temperature control (15–75°C) affecting diode behavior • Inst / Line input modes with appropriate impedance and gain staging • Switchable Boost stage (+20dB) • Variable high-pass filter • Classic analog-style tone control • 2x / 4x high-quality oversampling • Very low CPU usage, optimized for iOS • AUv3 support with smooth parameter automation SUITABLE FOR • Electric guitar (tight crunch to singing lead) • Bass guitar • Synthesizers & drum machines • Keyboards • Vocals & parallel saturation • Lo-fi, indie, rock, and modern production COMPATIBILITY • AUv3 Plugin • iPhone & iPad (iOS 15+) • AUv3 hosts.
HarmonyAngel
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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
Screenshots
Verdict
ThermVoltSilicon and HarmonyAngel are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. ThermVoltSilicon sells 1 one-off in-app purchase and HarmonyAngel sells 4 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.
| Parameter | ThermVoltSilicon | HarmonyAngel |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 28 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Shoma Kondo | Better World Studio |
In-app purchases
ThermVoltSilicon
- ThermVoltSilicon Full Version$4.99
HarmonyAngel
- Weekly Subscription3 Days trial$0.997 Days
- Monthly Subscription$1.991 Month
- Yearly Subscription$9.991 Year
- Life-time Purchase$19.99
Questions
Is ThermVoltSilicon free?
Is HarmonyAngel free?
Do ThermVoltSilicon or HarmonyAngel have ads?
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