The Corona-Warn-App is an app that helps trace infection chains of SARS-CoV-2 (which can cause COVID-19) in Germany. The app is based on technologies with a decentralized approach and notifies users if they have been exposed to SARS-CoV-2. Transparency is key to both protect the app's end-users and to encourage adoption.

I found out a couple of days ago that the iOS version of the Corona-Warn-App is using FMDB, which I find delightful. FMDB has been around a long time and it's still an Objective-C project, but it keeps on kicking and showing up in places I'd never imagined.