Analyze your conversations and get tons of data a graphs
Some of the features:
-What time of day do you talk the most?
-What day of the week do you talk the most?
-What expressions do you use the most?
-Who takes the longest to respond?
-How long do your conversations last?
-Who has the richest language?
And many more..
Every process is done localy on your phone, so no worry about your data being shared on the internet.