As one of the measures to curb the spread of covid-19, it is recommended (at least in Germany) to keep a "contact diary". That would be a list of people you have come in closer contact during the day for more than a brief moment, along with notes whether e.g. some or all people involved were wearing masks, whether the encounter happened in an enclosed space, etc.
I am looking for a Windows desktop application that easily lets me keep a contact diary.
There are various mobile apps, but I do not like the prospect of typing even more on that tiny on-screen keyboard.
Open source is preferred, but not a must; however, the application should be usable free of charge.