# RFCReader Pro vs ZF RC

The clearest difference is price: ZF RC at Free against RFCReader Pro's $1.99. ZF RC also leads on update cadence (fortnightly vs every 3 months). RFCReader Pro's advantage is iOS requirement (11.0 vs 13.0). On ads, in-app purchases and device support there is nothing between them.

ZF RC is free to download; RFCReader Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RFCReader Pro ships an update every 3 months, ZF RC fortnightly. The most recent releases landed on June 1, 2026 and August 25, 2026 respectively.

## The numbers

| Metric | RFCReader Pro | ZF RC |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 3 MB | 33 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [飞 龙](https://appshunter.io/developer/965611281) | [shenzhen cooingdv technology co.,ltd.](https://appshunter.io/developer/1255741645) |

## 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

**In-app purchases:** none


### ZF RC

[App page](https://appshunter.io/ios/app/zf-rc/id6742733365)

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

**In-app purchases:** none


## Frequently asked questions

### Is RFCReader Pro free?

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

### Is ZF RC free?

ZF RC is free to download, with no in-app purchases.

### Do RFCReader Pro or ZF RC have ads?

Neither RFCReader Pro nor ZF RC shows ads.

### Which is updated more often, RFCReader Pro or ZF RC?

RFCReader Pro ships an update every 3 months, and ZF RC fortnightly. Most recently, RFCReader Pro was updated on June 1, 2026 and ZF RC on August 25, 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.*