Crypto Notes vs WatchPen

The goal of the Crypto Notes app is to create the most secure note-taking application. Without the password, no one can access or modify your notes. We use an encryption method that is very close to information-theoretic security, providing a level of security equivalent to it in most typical scenarios. The password is the only way to access your notes. If you forget it, the content of your notes will be permanently lost. Therefore, please make sure to remember your password carefully and avoid setting one that is too simple, to prevent others from guessing it through brute force attacks. Notes are encrypted and stored locally, not on the server. You can back them up via iCloud.

Capture short handwritten notes directly on your Apple Watch. Each note syncs to your iPhone automatically through your private iCloud — no typing, no third-party accounts, no setup beyond signing into iCloud. WatchPen is built for moments where reaching for your phone is too slow. Lift your wrist, jot a thought with your finger, and the note is waiting on your iPhone moments later. Share any note as a PNG straight from the iPhone viewer. Features - Handwriting capture on Apple Watch - Automatic iCloud sync to the paired iPhone - Lightweight iPhone viewer - One-tap share as PNG - No accounts, no tracking, no analytics Your notes live in your own iCloud private database. Nothing is collected or shared.