# Identicode — Secret Codes for Secret Agents

> Digital code-breaker for 'TV Century 21' comic secret messages. (iPhone/iPad app by Stephen Watson.)

- Source: https://appshunter.io/ios/app/identicode/id907477645 (this page in markdown: same URL + `.md`)
- Developer: [Stephen Watson](https://appshunter.io/developer/386784520)
- Category: Entertainment, Utilities
- Price: $0.99
- Age rating: 4+
- Requires: iOS 26.0 · 12 MB
- Languages: American English
- Released: 2014-08-15
- Data updated: 2026-06-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/identicode/id907477645/reviews.md

## What is Identicode?

This futuristic, yet strangely retro technology allows you to break the secret codes supplied in the 1960s Sci-Fi comic "TV Century 21". 

The original issue of the comic on January 23rd 1965 came with a functionally identical code-breaker but, more than 50 years later they are a very rare beast indeed and possibly chewed and mouldy as they were made of thin card and paper. So, if you have some old copies of the magazine (and you can buy them online!) and you've been yearning to know what those secret messages at the foot of the pages were then this is just the app you've been looking for!

If you were feeling mischievous you could of course encode your own messages to surprise your friends on Social Media. :-)

*) Supports Red and Blue encoding and decoding
*) Use the camera to quickly enter coded messages (where supported)
*) Shake to clear
*) Exciting futuristic, retro look, feel and sounds
*) Escapist fun and silliness
*) Auto decode message shared by fellow agents
*) VoiceOver support

Please contact me through my website if you have any questions.

## Key features

- Red and Blue encoding/decoding
- Camera input for coded messages
- Shake to clear functionality
- Futuristic, retro aesthetic
- Auto-decode shared messages
- VoiceOver support

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/identicode/id907477645/reviews.md

### 5/5 — Century21 Secret Agent

*2014-12-27*

If you were a fan of Century21 comics (Thunderbirds, Stingray, Fireball XL5 and all the Gerry and Sylvia Anderson productions) then you'll love this little app. The design is true to the spirit of 1960s sci-fi puppetry. 
The comics used to have secret messages in code, which you could only decipher if you had the key. 
This little app does it all for you. Write your message and it will translate it into blue or red code and back again. Use it if you don't want people prying on your emails (of course the person you're sending to will need IdentiCode too) or if you really are a secret agent. Shh ...

**Developer response:** Thanks for such kinds words and glad you like the style.

## Frequently asked questions about Identicode

### What is Identicode?

Identicode is a digital tool designed to decode secret messages found in the 1960s sci-fi comic 'TV Century 21'. It replicates a physical code-breaker from that era, allowing users to decipher or create coded messages.

### How much does Identicode cost?

Identicode is a paid application, available for $0.99. This one-time purchase grants you access to all its features.

### What devices does Identicode support?

Identicode is currently supported on iPhones. Future updates may expand compatibility to other devices.

### Does Identicode have ads?

No, Identicode does not contain advertisements. As a paid app, it offers an ad-free experience.

### What are the encoding types supported by Identicode?

Identicode supports both Red and Blue encoding and decoding. This allows for versatility in deciphering various secret messages from the comic.

### Can I use my camera with Identicode?

Yes, Identicode supports using your device's camera to quickly enter coded messages, where technically supported. This feature streamlines the process of inputting codes.

### Is Identicode suitable for children?

Identicode has an age rating of 4+, making it suitable for younger users. Its focus on decoding and retro fun is generally appropriate for this age group.

### How often is Identicode updated?

Identicode was last updated to version 3.1 on December 30, 2025. While specific update frequency isn't detailed, this indicates ongoing development and support.

## Version history (last 5 releases)

### 3.1 — 2025-12-30

Compliance with Apple's Age Ratings

### 3.0 — 2025-10-30

Now requires iOS 26 and has a new icon to match
Identicode adopts a minimal Liquid Glass aesthetic as it has its own curious interface.
A recreation of the map seen on the original cardboard Identicode folder has been added to the Help page
And …

Identicode can now be used with Shortcuts, allowing you to encode and decode text from outside the app itself!

### 2.0 — 2023-07-09

You can now scan messages directly into Identicode using the new camera button with no typing required (on iOS15 or newer). If the colour code is present at the start of the message (as it is in the magazine) then Identicode will automatically switch to the correct colour and switch to decode operation. This kind of convenience is something every secret agent appreciates when mission timescales are tight.

### 1.9 — 2021-03-23

* Button tap physical feedback on iPhones that support it
* Convert button is no longer enabled once the input has been processed

### 1.8 — 2021-01-26

Updated web links on this page and in the app to agree with my web site update.

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## More apps by Stephen Watson

- [Bargain](https://appshunter.io/ios/app/bargain/id386784517)
- [Brighton Pink Plaques](https://appshunter.io/ios/app/brighton-pink-plaques/id1514835855)

All apps by Stephen Watson: https://appshunter.io/developer/386784520

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*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.*