# EUCCOST07-BP01 Use the available cost optimizers for Amazon WorkSpaces and Amazon WorkSpaces Applications
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 Leverage available tools from AWS and partners to support you with cost monitoring and optimization. 

 **Level of risk exposed if this best practice is not established:** High 

## Implementation guidance
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 Amazon WorkSpaces Applications uses app block and image builders that are charged hourly or in one second increments with a 15-minute minimum if you keep them running. You must explicitly stop them to stop the billing. The [Cost Optimizer for Amazon WorkSpaces Applications](https://github.com/aws-samples/cost-optimizer-for-amazon-appstream2) can monitor your WorkSpaces Applications app block and image builders and notify you or stop them when they are active for longer than specified thresholds.  

 Third-party tools like the [AppStream Optimizer by Cambrian Technologies](https://www.cambriantechnologies.com/solutions/appstream-optimiser/) use machine learning to optimize your WorkSpaces Applications Fleets and achieve a better utilization. This helps reduce your cost by reducing idle capacity. 

 Deploy the [Cost Optimizer for Amazon WorkSpaces](https://aws.amazon.com/solutions/implementations/cost-optimizer-for-amazon-workspaces/) to receive reports with recommendations on which running mode to select for your WorkSpaces and automatically convert your WorkSpaces to the most cost-effective running mode.