As an app developer, Alexander knows better than most the dangers of giving away our personal data in the name of convenience and has a challenge for you to take back control. Alexander is the cofounder, and Chief Technical Officer at ClimateClever, a startup helping schools, communities and businesses reduce their carbon footprint. A fullstack developer with over ten years of experience, he previously ran an app development agency managing various teams from design and marketing to web and native mobile app developers, both in Australia and abroad. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx