Write Securely.

Think Freely.

Cryptonium is a better way to take notes. It was created by taking inspiration from technologies such as Bitcoin. The app uses industry standard encryption to protect and sync your data while allowing you to remain completely anonymous. It is a privacy-focused place for your thoughts and ideas.

Take Secure and Private Notes

Your ideas and thoughts are important. And they belong to you. You have a right to privacy. This app uses end-to-end encryption to secure your data before it ever touches a server. Everything you type here is encrypted using the highest standards in the industry, and you are the only one who is given the decryption key.

This means that full ownership of your data belongs to you. It means that you are protected from hackings or law enforcement subpoenas. It means that nobody, not even us, can read or access your data

Remain Completely Anonymous

The Era of Accounts needs to end. It’s time to stop giving away personal details and registering, only to be spammed by marketing emails or learn your information was comprised in a data breach by hackers.

This app uses a Zero Knowledge Authentication system to link your devices. You don’t provide anything personal like an email address. Instead, you are given a QR code, which you can scan to link your other devices for sync. No account. No marketing spam. No data breaches.

Powerful Markdown Editor

Markdown is a wonderful way to add rich text styling to your notes without a lot of clutter. You have a variety of options to organize and style your work:

And when it’s time to write, the editor gets out of your way. Distracting UI elements are hidden, allowing you to get in a flow and focus.

  • Headings (1-6)
  • Line Breaks
  • Comments
  • Bold
  • Italic
  • Underline
  • Strikethrough
  • Highlight
  • Inline code
  • Code Blocks
  • Bullet Lists
  • Unordered Lists
  • Ordered Lists
  • Todo Lists
  • Block-quotes
  • More comming soon!

Organize Your Way

An important feature of any note-taking app is the ability to bring order to the notes you create. With this app, you’ve got some powerful options: With Workspaces, you can group items together that are quickly accessible from your sidebar. Add Sub-Notebooks for unlimited levels of hierarchical organization. And notes can have tags added to them, which provides an excellent cross section of your data.

Other Features

Realtime Offline Sync

Note changes sync in real time. Access data even when offline

Capture Thoughts Quickly

Inbox mode allows you to think first, organize later.

Find Notes Fast

Use smart filters like recent, or quickly view all notes *search is coming soon!

Cutting Edge Technology

Built using the best in the industries. Level powerful Apple platform features

Available for Mac and iOS

Write on all your devices

Built by Creators, not Marketers

No Ads, No Accounts, No Marketing Email Spam. No Data Collection. No Spying

Try Free Today

Download Cryptonium onto one of your devices and give test it out.
You can use the app completely free with a 10 note limit, or subscribe to a 30 day trial.