CryptKB
Encrypt txt or file then send
Lowest price: Free 2 months ago (-100%)
Price history
About
Encrypt messages and files locally on your device before sending. Use a custom keyboard or Messages extension to easily encrypt and decrypt content with a password. Your data remains private with no account creation or backend servers.
What's New in CryptKB
1.0
April 27, 2026
Developer apps
FAQ
What is CryptKB?
CryptKB is a utility app that allows you to encrypt message text or files locally on your iPhone or iPad before sending them. It uses a custom keyboard and a Messages extension for easy integration.
How does CryptKB encrypt messages?
CryptKB uses AES-256-GCM encryption with PBKDF2-HMAC-SHA256 key derivation. You type your message, choose a password, and then tap 'Encrypt & Insert' to create an encrypted payload.
Can I decrypt messages with CryptKB?
Yes, to decrypt, you paste or open a CryptKB payload, enter the matching password, and CryptKB will display the plaintext in a local panel.
Does CryptKB require an account?
No, CryptKB does not require any account creation. It operates entirely locally on your device with no backend relay or analytics SDKs.
Is CryptKB free to use?
Yes, CryptKB is available for free. It does not have any in-app purchases or advertisements.
What devices does CryptKB support?
CryptKB is supported on iPhone and iPad devices.
How often is CryptKB updated?
The app was last updated on April 27, 2026, with version 1.0. Further update frequency is not specified but it is a stable release.
What is the age rating for CryptKB?
CryptKB has an age rating of 4+, making it suitable for a wide range of users.
