When I get a message I try to reply as soon as possible. Just to not forget. But sometimes it does not help and I still forget to respond.
This is autotranslated version of this post.
Unreplied displays in the system tray all the unanswered messages in iMessage.
The rules under which the application will display messages you can customize to fit your needs. You can specify the sort order, hide messages older than a specified period, to hide messages from people not from your contacts, hide service messages or short.
In the end, you will be able to monitor only the important correspondence.
Unreplied uses the built-in macOS sandbox so for the safety of the correspondence can not survive. This blocks the data transfer from the application to the network and from applications to other applications.
In the latest version has a reminder and command line support export data to a CSV file.