# Soniq Viewer vs Chorus Lesson

The clearest difference is review sentiment: Soniq Viewer at 100% against Chorus Lesson's 0%. Soniq Viewer also leads on in-app purchases (none vs 10) and device support (3 vs 1). Chorus Lesson's advantage is update cadence (every 2 weeks vs every 20 months). On ads there is nothing between them.

Soniq Viewer costs $1.99 and Chorus Lesson $2.99 up front. Chorus Lesson sells 10 one-off in-app purchases. Soniq Viewer asks for nothing beyond the download.

Soniq Viewer ships an update every 20 months, Chorus Lesson every 2 weeks. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Soniq Viewer | Chorus Lesson |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/soniq-viewer/id448343005/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 228 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yuji Koike](https://appshunter.io/developer/416095228) | [NOKKEUSI Inc.](https://appshunter.io/developer/482532151) |

## What reviewers say

### Soniq Viewer

[App page](https://appshunter.io/ios/app/soniq-viewer/id448343005)

This app visualizes sound frequencies using your device's microphone. It displays the pitch of your voice and music on an equally-tempered musical scale, with adjustable input sensitivity and up to 60 frames per second.

**Highlights:** Frequency spectrum visualization, Microphone audio input, Pitch detection, Equally-tempered musical scale display, Adjustable input sensitivity, High frame rate display (up to 60 fps)

**Features:** macOS Compatibility

**In-app purchases:** none


### Chorus Lesson

[App page](https://appshunter.io/ios/app/chorus-lesson/id1515226301)

This app functions as a MIDI player designed for personal choral practice. It allows users to isolate individual parts, adjust volume and panning, and change playback speed for tailored practice sessions. Standard MIDI files can be played, with additional song data available for purchase.

**Highlights:** MIDI player for choral practice, Mute, solo, volume, panning per part, Adjustable playback speed, Play standard MIDI files, Purchase song data in-app

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30-days Trial for free | Free | one-time |
| BWV227 All through | Free | one-time |
| BWV226-1 Bars 1-145 | Free | one-time |
| Trial for 14 days | Free | one-time |
| BWV226-2 Bars146-244 | $0.99 | one-time |
| BWV226-3 Bars245-268 | $0.99 | one-time |
| BWV226 Complete set | $0.99 | one-time |
| BWV225 Complete set | $0.99 | one-time |
| BWV228; Fürchte dich nicht,... | $0.99 | one-time |
| BWV229; Komm, Jesu, komm | $0.99 | one-time |


## Frequently asked questions

### Is Soniq Viewer free?

Soniq Viewer costs $1.99, with no in-app purchases.

### Is Chorus Lesson free?

Chorus Lesson costs $2.99, and also offers in-app purchases.

### Do Soniq Viewer or Chorus Lesson have ads?

Neither Soniq Viewer nor Chorus Lesson shows ads.

### Which is updated more often, Soniq Viewer or Chorus Lesson?

Soniq Viewer ships an update every 20 months, and Chorus Lesson every 2 weeks. Most recently, Soniq Viewer was updated on October 23, 2026 and Chorus Lesson on October 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*