What is Decypher?
Decypher is developed exclusively for iPhone, compatible with iOS 16.0 or later, and has a file size of 72.5 MB. Leveraging the device’s camera and AI, it identifies Royal Cyphers on UK street mailboxes in real time, turning everyday walks into immersive historical explorations—from the Victorian era to the coronation of King Charles III—each cypher carrying messages of royal succession, local transformation, and evolving craftsmanship.
Key features
Through the phone’s camera, it recognizes Royal Cyphers on British mailboxes in real time, automatically decoding the monarch they represent, the era, and their design characteristics.
It provides concise information snippets about mailbox designs, manufacturing techniques, historical evolution, and the local community context, supporting light‑weight, on‑the‑go cultural exploration.
Use cases and audience
Ideal for general users interested in British history, urban design, and community culture; perfect for curious walkers and learners in educational settings.
- Use your phone’s camera to recognize Royal Cyphers on British street mailboxes and discover their historical and design backgrounds.
- Explore street-level amenities in your neighborhood, combined with AI-powered insights into their historical context.
- Learn real-time trivia about British postal history and local culture while walking through cities like London.
Real-time camera feed from the iPhone (used to recognize British mailboxes and other street fixtures).
Textual descriptions of the identified object’s design features, historical background, and local community information.
Frequently asked questions
Does Decypher support all iPhone models?
Supports older models, including the iPhone XS, running smoothly without any frame drops.
Is this app limited to use within the United Kingdom?
The app is specifically focused on mailboxes and street furniture within the UK, with features based on the British Royal Coat of Arms and local historical data.
How to use
- 01
Open the Decypher app.
- 02
Point your device at a mailbox or other street fixture within the UK.
- 03
Activate the camera and let the AI automatically recognize the royal coat of arms.
- 04
View design details, historical background, and community context displayed on-screen.
Pricing and availability
Free to download and use; the App Store page does not mention any paid features, subscription options, usage limits, word/character quotas, or commercial licensing terms.
- Pricing source
- https://apps.apple.com/gb/app/decypher/id6448763995
- Pricing last updated
- 2026-10-29
Prices and limits may change. Check the official website for current terms.
Official website & sources
Sources
Updated on 2026-10-29