Life Sum is a Swedish digital health startup that aims to make people healthier and happier by using applied psychology and technology. Founded in 2013, the company offers a mobile app that helps users achieve their health goals through personalized habits and nutrition plans. With over 26 million registered users worldwide, Life Sum has gained popularity for its easy-to-use interface and effective approach to promoting healthy living. The company prioritizes user feedback and releases new builds every other week, often testing internally before distributing them to the wider public. Life Sum's tech stack includes GitHub, Xcode, and Android Studio, with Instabug being a key tool for collecting and managing bug reports and user feedback. According to Sebastian and Tim from the team, the app's success lies in its ability to make healthy living simple and accessible, while also providing a premium version of their nutrition plan for users who want more personalized guidance.