Contact Diary for Android

A free program for Android, by Dieter Thiess.

This is a privacy-friendly app that lets you record when you met with whom. It's very easy to use. Just tap the button and enter the details. If you want to add more information, you can add the date, time, and place.

You can also use it as a reminder for when you have a free moment to think of a nice memory.

You can also use it to write a summary of the things that you have done in a day. It makes it easy to check how busy your day has been.

The user interface is clean and neat.