Hi all.

I published a new game on Google Play. It's named Watch out Eggy.

I want to request review to the android review sites for my games. They wanted the .apk file to check my game. Please tell me,

1. What's the difference between promo code and .apk file?
2. Is it safe to submit .apk file to them?,
3. Can they do anything 'not good' to my .apk file?
4. Can they edit my .apk file?
5. What other developer usually do?
6. Do they submit their games's .apk file to review sites?

Please reply me asap. I would be grateful! Thank you.