# RFCReader Pro vs AcousticLab

The clearest difference is price: AcousticLab at Free against RFCReader Pro's $1.99. AcousticLab also leads on review sentiment (100% vs 63%) and iOS requirement (15.6 vs 17.0). RFCReader Pro's advantage is in-app purchases (none vs 1) and update cadence (every 3 months vs every 7 months). On ads and device support there is nothing between them.

AcousticLab is free to download; RFCReader Pro costs $1.99 up front. AcousticLab sells 1 in-app purchase, starting at $9.99 per month. RFCReader Pro asks for nothing beyond the download.

RFCReader Pro ships an update every 3 months, AcousticLab every 7 months. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | RFCReader Pro | AcousticLab |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/acousticlab/id1382478687/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 62.5% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 3 MB | 7 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [飞 龙](https://appshunter.io/developer/965611281) | [ZKXY Technology Co., Ltd](https://appshunter.io/developer/1382478384) |

## What reviewers say

### RFCReader Pro

[App page](https://appshunter.io/ios/app/rfcreader-pro/id1036461920)

Access and read technical internet standards documents efficiently. Features include keyword search, bookmarking, text styling, and offline reading. Supports PDF and HTML formats with navigation aids.

**Highlights:** List all RFC documents, Search RFC by keywords or number, Add RFC to favorites, Mark and style text, Offline RFC reading, Read RFC in PDF and HTML formats, Navigate via Table of Contents and thumbnails

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

**In-app purchases:** none


### AcousticLab

[App page](https://appshunter.io/ios/app/acousticlab/id1382478687)

Transform your iOS device into a professional noise measurement tool. Capture precise sound with stereo recording, calibration, and advanced analysis features. Ideal for accurate audio data collection and evaluation.

**Highlights:** Professional stereo recording, Precise sound acquisition and analysis, Input channel calibration, Automatic recording triggers, Prerecord function, Signal marking and playback

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Audio Analysis Set, 1 Month | $9.99 | per month |


## Frequently asked questions

### Is RFCReader Pro free?

RFCReader Pro costs $1.99, with no in-app purchases.

### Is AcousticLab free?

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

### Do RFCReader Pro or AcousticLab have ads?

Neither RFCReader Pro nor AcousticLab shows ads.

### Which is updated more often, RFCReader Pro or AcousticLab?

RFCReader Pro ships an update every 3 months, and AcousticLab every 7 months. Most recently, RFCReader Pro was updated on October 2, 2026 and AcousticLab on October 10, 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.*