Supported Features
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VoiceOver
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Larger Text
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Dark Interface
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Differentiate Without Colour Alone
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Sufficient Contrast
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Reduced Motion
Sub Cipher
Encode &Decode Secret Messages
Free
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.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
* 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.
The developer, Eduard Schwan, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Provider
- Eduard Schwan
- Size
- 41.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.6 or later.
- iPhone
Requires iOS 16.6 or later. - iPad
Requires iPadOS 16.6 or later. - Mac
Requires macOS 10.14 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Copyright (c) 2026, SchwanSongs, all rights reserved