# Caesar vs ROT13 Decoder

The clearest difference is ads: ROT13 Decoder at none against Caesar's shown. Caesar's advantage is update cadence (every 2 weeks vs every 8 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Caesar ships an update every 2 weeks, ROT13 Decoder every 8 months. The most recent releases landed on July 29, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Caesar | ROT13 Decoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/caesar-cipher/id1559575000/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 8 months |
| Monetization | Ad-supported | — |
| Size | 43 MB | 16 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [佳伟 蔡](https://appshunter.io/developer/1801859662) |

## What reviewers say

### Caesar

[App page](https://appshunter.io/ios/app/caesar-cipher/id1559575000)

This utility tool encrypts and decrypts text using a Caesar cipher. Users can specify a shift value to transform their messages. Converted text can be saved within the application for later use.

**Highlights:** Caesar cipher encryption, Caesar cipher decryption, Customizable shift parameter, Save converted strings, Text transformation utility

**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 Caesar free?

Caesar 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 Caesar or ROT13 Decoder have ads?

Caesar shows ads; ROT13 Decoder does not.

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

Caesar ships an update every 2 weeks, and ROT13 Decoder every 8 months. Most recently, Caesar was updated on July 29, 2026 and ROT13 Decoder on September 9, 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.*