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For a limited time, Amazon is offering a $5 credit towards a Kindle eBook when you download a qualifying Amazon Underground game.
If you have an Android phone, simply download the free Underground app (full of free apps) and select one of these qualifying games to get a FREE $5 Kindle ebook credit! The $5 credit will automatically be applied to your account and you will receive an email notification about 24-48 hours after you have downloaded a qualifying game.
Limit 1 per customer. Only valid on first time downloads via the Underground app on any Android phone.
So does this not work for Iphones?
It’s a promotion for Android.