# Sub Cipher — Encode and Decode Messages

> Utility for encoding and decoding simple substitution ciphers like Caesar and Atbash. (iPhone/iPad app by Eduard Schwan.)

- Source: https://appshunter.io/ios/app/sub-cipher/id1582898316 (this page in markdown: same URL + `.md`)
- Developer: [Eduard Schwan](https://appshunter.io/developer/594336989)
- Category: Utilities, Entertainment
- Price: Free
- Rating: 3.75/5 from 4 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 40 MB
- Languages: English
- Released: 2021-08-31
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/sub-cipher/id1582898316/reviews.md

## What is Sub Cipher?

Sub Cipher is an easy-to-use Encoder/Decoder app, which can encode or decode your text using various "simple substitution" cipher methods. *

Simply type or copy-paste your encoded or decoded text to and from e-mail, messages, social media, and it is immediately converted for you.  Up to 2,000 characters can be converted at a time.

Sub Cipher offers you the encoded text, placeholder-text, and even a magic decoder wheel that you can add to your own books and publications.

You can also capture the cipher settings you have dialed in (as lines of text) to save in another document.  This can be useful if you are publishing a newsletter or book of ciphers, and want to keep a record of the settings you used with each cipher along with the cipher itself.

Main Features:
*Easy to use: Type into the plain-text or the cypher-text box, and the converted text is immediately displayed.
*Easy to transfer: You can select all the converted text and paste it into any other text document.
*Easy to adjust: Any substitution offset, forward or reverse can be dialed in.
*Easy to save: The settings you dial in can also be saved as text for your notes.
*Easy to publish: Any ciphers you make are 100% yours to publish and sell;  no copyright restrictions or restrictive "commercial use" clauses here.
*Forever Free: Download this software once and it is yours forever. You get all future new features and updates free.  No upgrade costs or "subscription/rental" fees. Ever.
*No Ads: You are never distracted from enjoying my software.
*Human-Made: This software was completely and carefully hand-designed and written by me.  No A.I. toys were allowed anywhere near this software.
*Private: Your work is safely yours and always stays on your computer.  You are never required to create internet accounts, and none of your information is ever stored in the cloud.

* Caveat Emptor: It uses the "Caesar" and "Atbash" style cipher methods, which are simple offset-alphabet ciphers.  The well-known "Rot13" cipher is one of these.  These ancient styles of ciphers are very simple and easy to decode!  This is simply a fun educational utility, and is not intended for serious "secret message" work.

## Key features

- Encode/decode simple substitution ciphers
- Supports Caesar and Atbash cipher methods
- Converts up to 2,000 characters at once
- Save cipher settings as text
- Create magic decoder wheels
- No licensing or royalties required for published ciphers

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/sub-cipher/id1582898316/reviews.md

### 5/5 — Great Software

*2025-01-13, version 1.0.5*

Sub Cipher is a great software.  It is so easy to use and works without flaws.  You can type in your regular words or phrases and it automatically encrypts them according to the adjustable offset.  You can make the offset either forward or reverse.  This makes it so easy to create educational books.   You can copy the plain text that you have inputted  and then copy the automatically ciphered text and paste it in a slide presentation or book.  This software works flawlessly and has such a well thought out aesthetically pleasing User Interface.

### 4/5 — Great piece of software

*2025-01-05, version 1.0.3*

Mainly a simple substitution, but fun to use. There’s so many ciphers out there, I’d like to see a few more. Good job!

### 4/5 — Good fun

*2024-11-24*

I know its a  cypher, but I used this little app as a unique name creator for an alien planet that features in my novel. An will use again. Thanks to the developer for that.

## Frequently asked questions about Sub Cipher

### What types of ciphers does Sub Cipher support?

Sub Cipher supports simple substitution ciphers, specifically mentioning Caesar and Atbash style methods. Rot13 is also noted as an example of these simple offset-alphabet ciphers.

### What is the character limit for encoding or decoding in Sub Cipher?

Sub Cipher can convert up to 2,000 characters at a time. This allows for the encoding or decoding of reasonably sized messages.

### Can I save the cipher settings I use in Sub Cipher?

Yes, Sub Cipher allows you to capture the settings you dial in as lines of text. These saved settings can be stored in another document, which is useful for keeping track of cipher configurations for newsletters or books.

### Is Sub Cipher suitable for serious secret message work?

No, Sub Cipher is described as a fun educational utility. The ancient styles of ciphers it uses are very simple and easy to decode, making it unsuitable for serious secret message work.

### Does Sub Cipher have ads?

No, Sub Cipher is ad-free. The application does not contain advertisements, providing an uninterrupted user experience.

### What devices is Sub Cipher available on?

Sub Cipher is supported on Mac, iPhone, iPad, and iPod devices. This broad compatibility allows users to access the utility across various Apple platforms.

### How often is Sub Cipher updated?

The latest version of Sub Cipher is 1.1.0, which was last updated on September 23, 2025. This indicates a recent update, suggesting ongoing support and potential for future improvements.

### What is the user rating for Sub Cipher?

Sub Cipher has a rating of 2.5 stars based on 2 ratings. This indicates a mixed reception from its current user base.

## Version history (last 5 releases)

### 1.2.0 — 2026-04-18

* Better UI Layout: All the "copy" action buttons are collected along right side of window.
* New "Settings" screen lets you adjust the font/colors of the "Secret Decoder Ring" graphic image.
* Added a new Intro screen to showcase the new "Secret Decoder Ring" wheel.
* Updated minimum OS version to iOS 16.
* Intro button has changed to be (i) circle button at top of window.
* Better support of new app icons for iOS 26.

### 1.1.0 — 2025-09-23

* Added new button "Copy Decoder", which will copy an image of a circular decoder ring (as PDF) you can paste into your puzzle book.
* Updated user interface and new icons for iOS 26.
* Updated background image to a ripply sea theme, which handles light/dark mode better.
* Removed the little reminder notifications when app is not launched for days...

### 1.0.5 — 2025-01-12

* Added new "Copy Text" buttons for easily copying encoded/decoded text to the clipboard.
* BugFix: "Copy _Placeholder" button works again.

### 1.0.4 — 2025-01-07

* Updated Minimum OS to iOS 12
* Nicer user interface arrangement.
* Updated Intro screens with new user interface layout.
* Added "Problems?" button that sends e-mail
* Added an explicit "Copy Cipher Settings" button under settings for ease of discovery.
* Added a "Letters" and "Characters" counter under plaintext area.
* Added a "Copy Placeholder" button that copies the text (to the clipboard) with all letters replaced with underscores, for ease of making puzzle books.
* Changed "help" button to system info/help button.

### 1.0.3 — 2022-09-08

* Increased text entry font size a bit for easier reading.
* Crisper user interface on all devices.
* Better Intro Help Screens.

## Apps similar to Sub Cipher

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Steganography: Hidden Message](https://appshunter.io/ios/app/steganography-hidden-message/id1565634629) | 4.2 (18) | Free | Utilities |
| [Arrowat Encryptor](https://appshunter.io/ios/app/arrowat-encryptor/id1601767060) | — | Free | Utilities |
| [PixelMask](https://appshunter.io/ios/app/pixelmask/id6642652050) | 5.0 (1) | Free | Utilities |
| [Text Encryption Tool](https://appshunter.io/ios/app/text-encryption-tool/id1624197966) | 3.5 (2) | Free | Utilities |
| [TextCrypt - Encrypted Storage](https://appshunter.io/ios/app/textcrypt-encrypted-storage/id1595447434) | 4.5 (4) | Free | Utilities |
| [Caesar-Cipher](https://appshunter.io/ios/app/caesar-cipher/id1559575000) | 1.0 (1) | Free | Utilities |

## More apps by Eduard Schwan

- [Romanoff](https://appshunter.io/ios/app/romanoff/id607887727)
- [Ask Fortuna](https://appshunter.io/ios/app/ask-fortuna/id1099533373)
- [Pass the Phrase](https://appshunter.io/ios/app/pass-the-phrase/id1329423590)
- [Lyttony](https://appshunter.io/ios/app/lyttony/id1329510137)
- [Sheer Abstractions Stickers](https://appshunter.io/ios/app/sheer-abstractions-stickers/id1464583476)
- [Pattern Bliss](https://appshunter.io/ios/app/pattern-bliss/id1531386739)

All apps by Eduard Schwan: https://appshunter.io/developer/594336989

## Related topics

[cipher decoder](https://appshunter.io/ios/topics/cipher-decoder) · [decoder cipher](https://appshunter.io/ios/topics/decoder-cipher) · [cipher caesar](https://appshunter.io/ios/topics/cipher-caesar)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*