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Codebook - Secure Notebook

By Zetetic LLC

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Codebook is a highly rated secure and encrypted notebook application. It protects your secret notes, ideas, and personal information from unauthorized access by would-be crackers, malicious thieves and snoopy coworkers. Codebook keeps your information secure, yet always at your fingertips.


"Don't waste your time or money on similar apps. This one tops them all. Trust me" - App Store Review
"I've tried other secure file apps and this one works the best" - NJAPilot
"Support rocks! ...These guys set the customer service bar pretty high... Big props to Codebook!" - Mark in Cali


* 256-bit AES Encryption and secure password protection for 100% of your data
* Full text searching and sorting by last edit or create
* Search for text and jump to location within a note
* Easy first-line document naming
* Quick copy / paste between applications
* Elegant and easy to read fonts
* Native look and simple to use interface that is similar to built-in iPhone Notes application
* Email notes directly from inside Codebook
* Auto-saves notes to avoid loss due to application interruptions
* Backup and multi-device synchronization using DropBox
* Email notes as password-encrypted PDF files
* Print notes with AirPrint-capable printers


Codebook is the only secure notebook that uses open source, peer-reviewed full-database encryption technology. Called SQLCipher, the data store for Codebook uses established security practices like CBC mode encryption, PBKDF2 key derivation, randomized initialization vectors, and unique per-database salts. It further takes advantage of Apple's CommonCrypto library for hardware-accelerated cryptography.

Even if you don't understand what all this security jargon means, you can rest assured that *we* do. Can you say the same about other notebook apps? Learn more at

What's New in Version 1.7.5

Battle-hardened by our beta testers (thank you!), a maintenance release to fix several important issues:

* Fixes restore from Dropbox when the database on Dropbox was created with an older version of Codebook
* Improves search function to avoid crashes on iOS6 and ensure that proper results are highlighted within the cell
* Fixes various editing and scrolling bugs on the note view

If you need to get in touch with us or you'd like to receive beta updates to help us test, please write us:

You can also visit our discussion forum:

iPhone Screenshot

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Customer Reviews

Works really well

A very nice app. Works well no crashes. Keep all my important info safe. And sync with dropbox. What else would i want

Codebook - Secure Notebook
View In iTunes
  • $3.99
  • Category: Productivity
  • Updated:
  • Version: 1.7.5
  • Size: 5.8 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 6.1 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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