The free whiteboard is built for quick diagrams and small sketches. Pro unlocks unlimited editable objects, scalable exports, transparent images, and a reusable license key across devices — pick a monthly or yearly subscription, or pay once for a lifetime license.
A casual sketch usually only needs a PNG. Teams, teachers, product managers, developers, founders, and support leads often need cleaner output for recurring documents, high-density screens, slide backgrounds, and diagrams that keep scaling after export. Pro keeps those heavier workflows available without forcing a subscription.
Payment is handled by Stripe Checkout, with card and Alipay supported for the one-time lifetime license. Caitty does not receive or store your payment details. After payment, the license endpoint confirms the successful Stripe session and returns a Sketch Whiteboard license key.
The success page stores Pro access in this browser and shows the license key tied to your checkout email. Use the Activate link on another device to restore access with the same email and key.
Free and Pro users can both export editable JSON. That means your diagrams can be saved with your project files and reopened later instead of being trapped inside a remote account.
Use the email from Stripe Checkout and your Sketch Whiteboard license key to unlock Pro on this browser.