Brothers David Sinkinson and Chris Sinkinson are Software-as-a-Service entrepreneurs. Their startup, AppArmor, helped keep people safe with mobile apps and emergency notification solutions for individuals across the globe. In February of 2022, their company was acquired by U.S. competitor Rave Mobile Safety. Later in 2022, Rave and AppArmor were acquired by Motorola Solutions. David and Chris are hosts of the Startup Different podcast and co-authors of the book Startup Different: The Myth-Busting Blueprint for Your Multi-Million Dollar Business.