# Is there a cost to use Sentinel3?

When you install Kerberus Sentinel3 you are enrolled by default into the Pro version.

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In the Pro version we charge a small fee on some swaps on select DEXes. You can read more in our [**Terms of Use**](https://www.kerberus.com/terms-of-use/).

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You can downgrade to the Free version at any time by clicking in your Sentinel3 extension on your browser, Settings, Downgrade to Free.