There is no separate Zutopia wallet app.
The Zutopia marketplace will utilize the existing Zucoin wallet app.
This is how things work with Zucoin’s wallet app and Zutopia:
In your Zucoin wallet app, when you click the “buy” button, it’ll open up the Zutopia marketplace and automatically log you in, using your Zucoin wallet’s details.
There is an automated authentication process that allows for this to happen smoothly and quickly.
Note: Naturally, the Zucoin team are considering different names for the “buy” button too, given its new behaviour.