One of the biggest problems in tech right now is privacy, and the general lack thereof when it comes to using most modern apps and services. Companies collect more data about us than we're probably aware of, and even if we don't think we have anything to hide, that information can be used in ways we don't anticipate, and often not to our benefit. That's why services like ProtonMail exist, and why we've started a series on open source alternatives to Google apps. Now the folks behind ProtonMail are expanding their portfolio G Suite-style with a new ProtonCalendar app.