# Kryptos Tools vs ROT13 Decoder

The clearest difference is update cadence: Kryptos Tools at every 3 weeks against ROT13 Decoder's every 8 months. ROT13 Decoder's advantage is iOS requirement (15.0 vs 18.6). 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.

Kryptos Tools ships an update every 3 weeks, ROT13 Decoder every 8 months. The most recent releases landed on September 17, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Kryptos Tools | ROT13 Decoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (7 ratings)](https://appshunter.io/ios/app/kryptos-tools/id6451396051/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 8 months |
| Monetization | Free | — |
| Size | 35 MB | 16 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jeffrey Williams](https://appshunter.io/developer/1151607389) | [佳伟 蔡](https://appshunter.io/developer/1801859662) |

## What reviewers say

### Kryptos Tools

[App page](https://appshunter.io/ios/app/kryptos-tools/id6451396051)

This app offers a comprehensive suite of classic cryptography tools, including Vigenère and Transposition ciphers, to help users explore and potentially solve complex puzzles. It consolidates features from previous versions and provides detailed information on famous unsolved codes.

**Highlights:** Classic cipher implementations, Vigenère cipher, Transposition Matrix, Detailed puzzle information, Sixteen classic ciphers, Future cipher additions

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

**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 Kryptos Tools free?

Kryptos Tools 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 Kryptos Tools or ROT13 Decoder have ads?

Neither Kryptos Tools nor ROT13 Decoder shows ads.

### Which is updated more often, Kryptos Tools or ROT13 Decoder?

Kryptos Tools ships an update every 3 weeks, and ROT13 Decoder every 8 months. Most recently, Kryptos Tools was updated on September 17, 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.*