Pick a platform, type a handle and a tag, get numbies. It pulls that account's tagged posts and shows likes, reposts, replies, and quotes, sorts them, charts them over time, and can list who engaged most. Nothing leaves your browser, it never asks for your password, and all data used is public-facing!
Save it and open the file in any browser to run it offline.
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Top engagers are only tallied while pulling stats, so changing that box takes effect the next time you pull stats.