# AudioEngineerKit: SPL & RTA — Pro SPL Meter, RTA & More

> Pro SPL Meter, RTA & More (iPhone/iPad app by HYO SEOP LEE.)

- Source: https://appshunter.io/ios/app/audioengineerkit-spl-and-rta/id6801498086 (this page in markdown: same URL + `.md`)
- Developer: [HYO SEOP LEE](https://appshunter.io/developer/6790621758)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.5 · 2 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China), European Spanish
- Released: 2026-08-18
- Data updated: 2026-08-21
- User reviews in markdown: https://appshunter.io/ios/app/audioengineerkit-spl-and-rta/id6801498086/reviews.md

## What is AudioEngineerKit?

SPL Meter & RTA is a precision measurement toolkit built for sound engineers working on site.

Free
• Real-time SPL (sound pressure level) meter — A/C weighting, dB
• 31-band RTA (real-time analyzer) — ISO 266 standard center frequencies
• Microphone calibration
• Room Mode Calculator

Unlock Pro (one-time purchase)
• LUFS loudness meter (BS.1770-4, Integrated/Short-term, target LU delta)
• RT60 reverberation time analysis
• Delay Finder — ESS sweep-based speaker alignment distance/time
• Polarity Checker — passive & active modes, A/B speaker comparison
• THD+N Analyzer
• Loopback Test — pink-noise RTA-style report
• External microphone support
• SPL threshold alerts & measurement history (session log)
• Dashboard view (SPL + RTA at a glance)

A universal app for iPhone, iPad, and Mac. Runs entirely on-device with no internet connection required — no accounts, no ads, no analytics, so your privacy stays yours.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro 잠금해제 | $2.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-08-18

No release notes.

## More apps by HYO SEOP LEE

- [AudioEngineerToolkit](https://appshunter.io/ios/app/audioengineertoolkit/id6794612792)
- [AET Quiz](https://appshunter.io/ios/app/aet-quiz/id6797225714)
- [무대음향 자격증 기출문제](https://appshunter.io/ios/app/id6798884217)
- [AudioEngineer EAR Trainer](https://appshunter.io/ios/app/audioengineer-ear-trainer/id6801893036)

All apps by HYO SEOP LEE: https://appshunter.io/developer/6790621758

---

*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 2026-08-21.*