Open your SimiCart dashboard, then select Publish App
In Publish page, you need to fill a unique Android Key for both Android and iOS.
In Android section, select Submit by Your Google Developer Acount
There are some required information that you need to fill out: Description, Version Name, Version Code, Short Description and Service Json (from the previous step).
Next, when you click Get release app. The process is going to take a few minutes and you will see a link to get the APK file (as in the red box)
Click Download Android App to get the APK.