# CipherStreet: Code Puzzles — Crack codes like a spy

> Crack codes like a spy (iPhone/iPad app by Denys Popov.)

- Source: https://appshunter.io/ios/app/cipherstreet-code-puzzles/id6777695131 (this page in markdown: same URL + `.md`)
- Developer: [Denys Popov](https://appshunter.io/developer/1893969151)
- Category: Games, Education, Family, Puzzle
- Price: Free with in-app purchases
- Age rating: 9+
- Requires: iOS 16.4 · 115 MB
- Languages: American English
- Released: 2026-06-17
- Data updated: 2026-08-08
- User reviews in markdown: https://appshunter.io/ios/app/cipherstreet-code-puzzles/id6777695131/reviews.md

## What is CipherStreet?

CipherStreet is a story-driven puzzle game where every level is a real cryptographic cipher - from Caesar shifts to RSA public keys - wrapped in a cold-war spy thriller.

Intercept encoded messages. Decode them with on-screen tools you discover, not tutorials you sit through. Unlock fragments of a decades-spanning conspiracy with every cipher you crack. By the end of ten chapters you'll have genuinely internalised the foundations of modern cryptography - roughly the first four weeks of a university course — without a single lecture.

THE STORY
A defector known only as The Architect has built a private intelligence network hidden inside ever more sophisticated ciphers. Your handler, Agent Kovács, sends each intercept with minimal context and maximum urgency. A mole. A missing codebook. A name that keeps reappearing across fifty years. Crack the codes before dawn.

TEN CHAPTERS, TEN REAL CIPHERS
• Caesar cipher: frequency analysis
• Vigenère: the pattern inside the pattern
• Rail Fence:  transposition
• Enigma (simplified): the crib attack that broke a war
• Playfair: grid geometry
• One-Time Pad:  the perfect, unbreakable lock
• Diffie-Hellman: sharing a secret in public
• RSA: math as a lock
• Hash functions: integrity, not secrecy
• Steganography: messages hidden in plain sight

WHAT MAKES IT DIFFERENT
• Learn by doing: tools are discovered through play, never explained at you
• Real, historically accurate cryptography, all running offline on your device
• A genuine spy narrative with characters, twists, and a finale that recasts everything
• No punishing fail states: get a cipher wrong and the story simply waits
• Build and share your own encrypted intercepts; challenge friends to crack them

FREE TO START
Chapters 1–2 are completely free, no account required. A single one-time purchase unlocks chapters 3–10 and every cipher type in the Builder. No ads. No subscriptions. No tracking.

The cipher is never the weakest link. The human always is.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Unlock — All Chapters | $4.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-06-17

No release notes.

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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 2026-08-08.*