There are a number of tools you can use to monitor and/or manage Mendix app performance.
1.1 Mendix Cloud
1.2 Other Deployment Options
Outside the Mendix Cloud, you can use Datadog, or there are alternative monitoring tools you can use. You can see these under Monitoring Tools in the Mendix Cloud Foundry Buildback.
Only Datadog is supported for apps deployed to the Mendix Cloud.