Terms of Use
Our apps are licensed to you under Apple's Standard Licensed Application End User License Agreement, plus the notes below.
Gearbook
Gearbook is a reference and calculation aid. It is not a substitute for the adopted code, the authority having jurisdiction, or a licensed professional's judgment. Always verify results against the code in force for your project. We are not responsible for decisions or work based on its output.
Bookends
Bookends is a player for servers you or others operate. You're responsible for the content on servers you connect to and for having the right to use it.
Purchases
Purchases and refunds are handled by Apple under its terms.
Contact
Effective October 24, 2026