

The Health Check tab, flagging real problems (PHP version, caching, security settings) instead of just listing facts.
Check System Details puts your entire WordPress, server, and database setup on one screen, flags real problems instead of just dumping raw facts, and gives you a few tools for handing that information off to support or keeping an eye on the site over time. No setup required – install and go.
A set of diagnostic checks, each marked Good, Warning, or Critical:
Reference tabs with tooltips explaining every field:
wp check-system-details prints the full report from the terminal