Software isn't the only investment they do though. They also invest in electric car companies (which prompted Musk to threaten to go private), companies that do major infrastructure/construction, industrial manufacturing, virtual reality and machine learning, chemicals and materials, aerospace, etc. Not using an app is easy, but if you really want to escape them you'll have a fairly hard time doing so. They even own 25% of Arm Holdings, so better toss that cell phone and tablet.