# SPL Graph vs MIDI Aid

The clearest difference is price: MIDI Aid at Free against SPL Graph's $9.99. MIDI Aid also leads on update cadence (every 6 weeks vs every 6 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

MIDI Aid is free to download; SPL Graph costs $9.99 up front. SPL Graph sells 5 in-app purchases, starting at $19.99 per month and MIDI Aid sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

SPL Graph ships an update every 6 months, MIDI Aid every 6 weeks. Both last shipped on November 13, 2026.

## The numbers

| Metric | SPL Graph | MIDI Aid |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/spl-graph/id307451201/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 64.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Monetization | Paid | — |
| Size | 30 MB | 41 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [Tobias Wissmueller](https://appshunter.io/developer/785655742) |

## What reviewers say

### SPL Graph

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

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 |


### MIDI Aid

[App page](https://appshunter.io/ios/app/midi-aid/id811495668)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MIDI Aid Pro | $0.99 | per month |


## Frequently asked questions

### Is SPL Graph free?

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

### Is MIDI Aid free?

MIDI Aid is free to download, with in-app purchases available.

### Do SPL Graph or MIDI Aid have ads?

Neither SPL Graph nor MIDI Aid shows ads.

### Which is updated more often, SPL Graph or MIDI Aid?

SPL Graph ships an update every 6 months, and MIDI Aid every 6 weeks. Most recently, SPL Graph was updated on November 13, 2026 and MIDI Aid on November 13, 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.*