# SPL Graph vs AudioLayer

The clearest difference is rating: AudioLayer at 4.4 against SPL Graph's 3.7. AudioLayer also leads on update cadence (fortnightly vs every 6 months) and ratings volume (179 vs 3). SPL Graph's advantage is price ($9.99 vs $12.99) and review sentiment (64% vs 56%). On ads, in-app purchases and device support there is nothing between them.

SPL Graph costs $9.99 and AudioLayer $12.99 up front. SPL Graph sells 5 in-app purchases, starting at $19.99 per month and AudioLayer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

AudioLayer holds the better App Store score, 4.4 against 3.7. That said, the two scores are not equally well evidenced: AudioLayer has 179 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 64% of SPL Graph's written reviews are positive against 56% of AudioLayer's, so the app with the better star average is not the one people write more warmly about.

SPL Graph ships an update every 6 months, AudioLayer fortnightly. The most recent releases landed on October 3, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | SPL Graph | AudioLayer |
| --- | --- | --- |
| Price | **$9.99** | $12.99 |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/spl-graph/id307451201/reviews) | **[4.4 (179 ratings)](https://appshunter.io/ios/app/audiolayer/id1381478666/reviews)** |
| Number of ratings | 3 | **179** |
| Positive reviews | **64.3% of reviews** | 55.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 29 MB | 242 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [Harry Gohs](https://appshunter.io/developer/382428644) |

## 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 |


### AudioLayer

[App page](https://appshunter.io/ios/app/audiolayer/id1381478666)

This app is a powerful mobile multi-sampler for music production, offering advanced features for creating and manipulating complex instruments. It integrates seamlessly with iOS production environments and supports iCloud for easy collaboration and storage.

**Highlights:** Streaming Sample Engine (SSE), Hierarchical Layer and Zone editing, Seamless Instrument Switching (SIS), Integrated audio sample recorder, Auto Sampler for hardware synths, AUv3 AudioUnit integration, iCloud storage and collaboration

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SoundFont Import | $3.99 | one-time |

**What reviewers like**

- 🎹 Powerful multi-layer sampling capabilities
- 📥 EXS24 and SFZ file import support
- 🎯 Round-robin functionality for realistic instruments
- ⚡ Efficient performance on older devices
- 🎚️ Comprehensive effects rack with quality sound

**What reviewers complain about**

- 🐛 Frequent crashes across multiple iOS versions
- ⚠️ Stability issues in AUM and other hosts
- 🔌 High CPU/DSP usage causing performance spikes
- 🔋 Battery drain and device heating
- ❌ Missing undo function

**Reported bugs**

- App crashes on startup (splash screen)
- Reverb and chorus effects cause sound to disappear
- Pitch resets to -24 after stopping Logic Pro playback
- Layer voice polyphony controls not working properly
- SFZ batch import distributes samples incorrectly across layers

**Requested features**

- Time-stretching/pitch-shifting capability
- Program Change MIDI support
- Undo/Redo functionality
- GigaSampler .gig library support
- Soundfont SF2 import (now paid feature)


## Frequently asked questions

### Is SPL Graph free?

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

### Is AudioLayer free?

AudioLayer costs $12.99, and also offers in-app purchases.

### Which has better reviews, SPL Graph or AudioLayer?

AudioLayer is rated higher. SPL Graph averages 3.7 out of 5 from 3 ratings, while AudioLayer averages 4.4 from 179 ratings.

### Do SPL Graph or AudioLayer have ads?

Neither SPL Graph nor AudioLayer shows ads.

### Which is updated more often, SPL Graph or AudioLayer?

SPL Graph ships an update every 6 months, and AudioLayer fortnightly. Most recently, SPL Graph was updated on October 3, 2026 and AudioLayer on October 6, 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.*