Sep 16, 2026
Apdex (Application Performance Index) turns your response times into a single score between 0 and 1, so you can see at a glance how satisfied your users are with your app's performance.
You can set satisfied and tolerating thresholds per namespace, and AppSignal scores every request against thresholds. You get an Apdex page under Performance, plus apdex and apdex_counts metrics you can use on your own dashboards and in anomaly detection triggers.
Apdex is part of AppSignal Labs. Every organization has access to it. Read the Apdex documentation to set your thresholds, and tell us about it in our Discord channel.
