How can I publish my app on Google Play with my Android Developer Account?
If you have an Android Developer account, you must follow these 3 easy steps:
1) You must download the distribution bundle of the application you’ve created on Mobincube. More info.
2) Once you have it, you’ll find the .apk unsigned. You'll have to sign the .apk. More info.
3) The last step is to publish on Google Play following its own instructions.