# SPL Graph vs Music By Numbers

The clearest difference is price: Music By Numbers at Free against SPL Graph's $9.99. Music By Numbers also leads on rating (5.0 vs 3.7) and review sentiment (100% vs 64%). SPL Graph's advantage is chart position (#196 vs unranked) and iOS requirement (15.0 vs 18.0). On ratings volume, ads and device support there is nothing between them.

Music By Numbers is free to download; SPL Graph costs $9.99 up front. SPL Graph sells 5 in-app purchases, starting at $19.99 per month. Music By Numbers asks for nothing beyond the download.

Music By Numbers holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 7 respectively. Written reviews point the same way: 64% of SPL Graph's written reviews are positive against 100% of Music By Numbers's.

SPL Graph ships an update every 6 months, Music By Numbers every 8 days. The most recent releases landed on October 20, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | SPL Graph | Music By Numbers |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/spl-graph/id307451201/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/music-by-numbers/id1623018554/reviews)** |
| Number of ratings | 3 | **7** |
| Positive reviews | 64.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 8 days** |
| Monetization | Paid | **Free** |
| Best chart rank | **#196** | — |
| Size | 29 MB | 2 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [Timothy Bausch](https://appshunter.io/developer/1608625885) |

## What reviewers say

### SPL Graph

[App page](https://appshunter.io/ios/app/spl-graph/id307451201)

**Currently charting:** #196 Top Paid · Music (US App Store)

This app analyzes sound pressure levels and environmental noise in real-time. It logs audio, captures video, and performs frequency analysis, with options for advanced octave band analysis and professional microphone integration. Receive email notifications for exceeding noise limits and auto-save data for continuous monitoring.

**Highlights:** Real-time sound pressure level analysis, Audio recording and playback, Optional video capture, Octave and 1/3 octave band analysis, 3D frequency plot, Ln SPL value calculation, Email notifications for noise limits

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remote Noise Monitoring | $19.99 | per month |
| Remote Noise Mid Level | $79.99 | per month |
| Remote Noise Large | $149.99 | per month |
| Octave Band SPL Logging | $9.99 | one-time |
| Video Capture Option | $19.99 | one-time |


### Music By Numbers

[App page](https://appshunter.io/ios/app/music-by-numbers/id1623018554)

This application simplifies complex post-tonal music calculations. It allows users to instantly compute matrices and pitch set collections, with options to view detailed set information, rotate, invert, and flip sets. Users can also save and edit their work for future reference.

**Highlights:** Instant matrix and pitch set calculations, View pitch set information on matrix, Rotate, invert, and flip sets, Save and edit matrices and sets, Customizable display for 10 and 11, Customizable colors for PC selection and axis

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

**In-app purchases:** none


## Frequently asked questions

### Is SPL Graph free?

SPL Graph costs $9.99, and also offers in-app purchases.

### Is Music By Numbers free?

Music By Numbers is free to download, with no in-app purchases.

### Which has better reviews, SPL Graph or Music By Numbers?

Music By Numbers is rated higher. SPL Graph averages 3.7 out of 5 from 3 ratings, while Music By Numbers averages 5.0 from 7 ratings.

### Do SPL Graph or Music By Numbers have ads?

Neither SPL Graph nor Music By Numbers shows ads.

### Which is updated more often, SPL Graph or Music By Numbers?

SPL Graph ships an update every 6 months, and Music By Numbers every 8 days. Most recently, SPL Graph was updated on October 20, 2026 and Music By Numbers on October 14, 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.*