Download the Bitment desktop app

The Bitment desktop app is one app for both products. Sign in the way you do on the web, choose BitmentOS or Bitment Books, and the app takes you there and stays signed in. It is signed and notarized for macOS (Apple silicon) and Windows, and it updates itself.

Download it from this page, or use BitmentOS in the browser at os.bitment.co and Bitment Books at books.bitment.co; they are the same products.