Call History Manager is a phone utility developed by Passionate Androiden. This application gives you the history of all of your phone calls.
Once you've permitted for Call History Manager to access your Phone application, you'll be immediately be greeted with a list of your phone calls. From there, you can get information like what phone number called you and what they called you.
Overall, Call History Manager can seem useful enough if you don't have a comprehensive history of your phone calls but chances are all of these features are already built into your Android phone if you've gotten a new one in the past couple of years.