Billing and in-app payment libraries make it possible for users to pay for products in an app. These SDKs mostly work with well-known Android Markets like Google Play, Amazon, and the Samsung Galaxy App Store.
This overview of billing and in-app payment SDKs provides you with the most-used and well-known libraries to pay in Android apps including Google Play in-app billing, Amazon in-app purchasing, PayPal and Samsung in-app purchase.
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