# Musical Meter 2 vs Sub System

The clearest difference is price: Musical Meter 2 at Free against Sub System's $30.00. Sub System's advantage is review sentiment (100% vs 78%) and update cadence (every 10 days vs every 6 weeks). On ads, in-app purchases, monetization model and device support there is nothing between them.

Musical Meter 2 is free to download; Sub System costs $30.00 up front. Neither carries in-app purchases, so what you see is what you pay.

Musical Meter 2 ships an update every 6 weeks, Sub System every 10 days. The most recent releases landed on September 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Musical Meter 2 | Sub System |
| --- | --- | --- |
| Price | **Free** | $30.00 |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/musical-meter-2-notation/id1072803356/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 77.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | Paid | Paid |
| Size | 71 MB | 48 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Quizness Apps](https://appshunter.io/developer/1062928731) | [sebastian rivas](https://appshunter.io/developer/506708461) |

## What reviewers say

### Musical Meter 2

[App page](https://appshunter.io/ios/app/musical-meter-2-notation/id1072803356)

Learn to read and play music rhythms with interactive exercises. This app teaches note duration and timing through visual and auditory examples, preparing you for real sheet music. It focuses on compound time, various note types, and developing a strong sense of rhythm.

**Highlights:** Learn note duration and timing, Visual and animated examples, Interactive, randomly generated levels, Professionally engraved notation, Compound time concepts, Eighth and sixteenth notes/rests, Dotted notes

**Features:** Vision Pro support

**In-app purchases:** none


### Sub System

[App page](https://appshunter.io/ios/app/sub-system/id1533524994)

This app allows audio engineers and sound designers to visualize sound pressure levels and their interactions. Users can place virtual speakers and microphones, manipulate them with touch gestures, and observe colorful graphs of SPL and frequency response to understand acoustical summation.

**Highlights:** Virtual speaker placement, Sound pressure level visualization, Frequency response graphs, Virtual microphone simulation, Touch-based manipulation, Acoustical summation understanding

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

**In-app purchases:** none


## Frequently asked questions

### Is Musical Meter 2 free?

Musical Meter 2 is free to download, with no in-app purchases.

### Is Sub System free?

Sub System costs $30.00, with no in-app purchases.

### Do Musical Meter 2 or Sub System have ads?

Neither Musical Meter 2 nor Sub System shows ads.

### Which is updated more often, Musical Meter 2 or Sub System?

Musical Meter 2 ships an update every 6 weeks, and Sub System every 10 days. Most recently, Musical Meter 2 was updated on September 25, 2026 and Sub System on October 7, 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.*