# iSPL PRO+

> iSPL PRO+ (iPhone/iPad app by Colours Lab.)

- Source: https://appshunter.io/ios/app/ispl-pro-plus/id6762527669 (this page in markdown: same URL + `.md`)
- Developer: [Colours Lab](https://appshunter.io/developer/528274160)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 23 MB
- Languages: American English
- Released: 2026-04-27
- Data updated: 2026-07-03
- User reviews in markdown: https://appshunter.io/ios/app/ispl-pro-plus/id6762527669/reviews.md

## What is iSPL PRO+?

iSPL PRO turns your iPhone, iPad, or iPod touch into a smart Sound Pressure Level (SPL) meter using the built-in microphone. Measure surrounding noise quickly and easily with both digital and analog display modes.

### Features

• Real-time sound level measurement  
• Current, Average, Minimum, and Maximum values  
• A, B, C, and D frequency weighting filters  
• Linear (unweighted) mode  
• Fast or Slow response modes  
• High, Normal, or Low time resolution settings  
• Start or stop measurements anytime with a single tap  
• Calibration adjustment up to ±10 dB for improved accuracy  
• Multiple display styles with digital and analog views  
• Three graphical sound level visualizations  
• Save and send measurement results via email  
• Quick reference guide with real-life noise examples (available in unweighted mode)

### Calibration

The app comes pre-calibrated for the typical built-in microphone of supported Apple devices. If readings differ from a traditional SPL meter, you can fine-tune accuracy from the Settings screen.

### Important Notice

iSPL PRO provides an estimate of environmental sound levels and is intended for general and entertainment use. It is not designed as a certified professional measurement instrument.

### Enjoying iSPL PRO?

Please support us by leaving a rating and sharing your feedback.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro Unlock | $4.99 | one-time |



## Version history (last 1 release)

### 3.0.1 — 2026-04-27

No release notes.

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-03.*