Contact Diary is an open source Android app that allows you to keep a record of the people you have met and the events you have attended to recently. In the undesired event that you test positive for COVID-19, Contact Diary is a place where to quickly find who you must warn about the situation.
Every day Contact Diary will prompt you to insert the events you have attended and the people you have been with during the day. Through some simple forms you will be able to store the essential information about your contacts, in case you need to retrieve it. Just that. Simple, right? ;)
You can check the source code, let me know about bugs, propose new features, and support the development of Contact Diary in its associated Github repository.