Windows
For Windows 10/11. Download and follow the installer.
Download Desktop.
Install it locally and try it first. Sign in and top up when you're ready to keep going.
macOS
For macOS. Open the package and allow it from the system prompt.
You'll know it's the real build.
Every package lists its file size, release time, and SHA256. If signing, notarization, or the digest doesn't match, don't install — contact support.
Windows integrity checks
Verify SHA256 after downloading. If an installer shows a digital signature, also confirm the publisher and certificate status.
macOS notarization
Notarized by Apple, so it clears the system security prompt the first time you open it.
SHA256 checksum
Every package ships a SHA256. Verify it locally, and only install if it matches.
Three steps to get going.
Install
Pick your version and install it locally.
Open
Launch ClaudeU Desktop and dive in.
Continue
Low on balance? Top up on the web.
New device or low balance? These two links have you covered.
Re-authorize on login, top up on pricing. The web handles your account — the work stays in Desktop.