# FAQs

**Who is the main audience for this app?**

The main audience for this app is the developers of the businesses to whom we give the Cash App Pay API credentials. We will also give them the links to the Sandbox apps (both Android and iOS).

**Is the Sandbox app widely available for external users?**

No. the App is not widely available for external users.

**Can we use it on Desktop?**

You need a Desktop to test the Pay Kit web SDK. The Pay Kit SDK loads the Merchant website which displays the QR code you have to scan using the Sandbox App. We may consider building a special version of the Sandbox iOS for desktop simulators.

**Is there a difference between the iOS and Android app?**

There are no functional differences between the Android and iOS apps, as the apps are written using a single codebase.