In-app buys Google vs. Apple. How do I get exactly the same conversion rates so that prices match the two platforms?

I am facing the following problem.

I am developing an app for both iOS and Android platform. I have set in-app purchase prices exactly the same as indicated in USD.

Now here's the problem.

When prices are converted to a different currency because the user is in a different country, Apple's conversion rates differ from Google.

This leads to an unfair inconvenience for iOS and Android users, as one user can pay more / less for the same purchase simply because they are using a different device.

Is there a way to make the conversion rate the same for both platforms? I understand that on iOS we need to keep track of the price level matrix, so in this case, I think Google will follow the iOS prices. How can i do this?