docs/hosting/compute.md
import reflex as rx
Reflex Cloud measures compute while an app instance is running. Usage depends on:
An app can become idle when it has no active users. Idle instances do not accrue compute usage and wake when the app receives another request.
Compute is based on instance runtime, not the number of people using the app. For example, one instance running for an hour uses the same compute time whether it serves one person or several people during that hour.
The deployment form may show a disabled Persistent Machine option. This feature is not available yet. When disabled, Reflex manages app instances and can scale them down when idle.
Open Usage in the organization sidebar, then select Cloud to review deployment usage. Choose a project and app to narrow the charts. Select an app-region series in a chart legend to show or hide it.
See Billing for how compute and seats contribute to billing.