# AF vs ROT13 Decoder

The clearest difference is update cadence: ROT13 Decoder at every 8 months against AF's every 38 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AF ships an update every 38 months, ROT13 Decoder every 8 months. The most recent releases landed on October 3, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | AF | ROT13 Decoder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 8 months** |
| Size | 140 MB | 16 MB |
| Requires iOS | 16.2 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [john Cheng](https://appshunter.io/developer/1243789980) | [佳伟 蔡](https://appshunter.io/developer/1801859662) |

## What reviewers say

### AF

[App page](https://appshunter.io/ios/app/af-21-iotstation/id1555390742)

**Features:** macOS Compatibility

**In-app purchases:** none


### ROT13 Decoder

[App page](https://appshunter.io/ios/app/rot13-decoder/id6743629613)

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

**In-app purchases:** none


## Frequently asked questions

### Is AF free?

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

### Is ROT13 Decoder free?

ROT13 Decoder is free to download, with no in-app purchases.

### Do AF or ROT13 Decoder have ads?

Neither AF nor ROT13 Decoder shows ads.

### Which is updated more often, AF or ROT13 Decoder?

AF ships an update every 38 months, and ROT13 Decoder every 8 months. Most recently, AF was updated on October 3, 2026 and ROT13 Decoder on October 13, 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.*