You can check extensive and accurate statistics for each chat (group and private) that you won't find in any other application. Just double click.
You can also check the number of messages for specific time intervals, so if you want to do a "messenger wrapped" this is the perfect app for that.
To use this app you need to download all(recomended) your data directly from Facebook (in JSON format) and unzip all files to one folder. How to download my data?
In messages folder you need to copy all folders from archived_threads, filtered_threads, e2ee_cutover and message_requests to inbox folder. Sometimes you will have 2 folders your_activity_across_facebook and your_facebook_activity so you need to copy from all places to one folder.
Download the latest version of Counter For Messenger from GitHub. Unzip the file and run the CFM.exe file.
Counter For Messenger is licenced under Beerwere. Please see my Portfolio for more information.