GetJar is weighing in on the in-app payments debate. In a statement issued today, the open app store said developers should be able to choose whether they want to incorporate purchasing into their apps or use app store payments or carrier billing.

Citing the success of Papaya Mobile’s use of Billing Revolution’s in-app payments technology in its Android applications, GetJar said app developers know best which solutions will give them the greatest payout based on their user demographics and locations.

“GetJar’s goal is to empower developers to make more money in our app store, which is why we never take a cut of the developer’s revenue and we let the developer choose the billing partner that works best for them,” said GetJar Chief Marketing Officer Patrick Mork, in a statement.

Papaya Mobile, which offers several social apps on the Android platform, said it reached first-time conversion rates of 34 percent and second transaction conversion rates (single-click enabled) of 72 percent using Billing Revolution’s single-click checkout for several of its Android titles on GetJar.

Billing Revolution’s single-click checkout lets app users make credit card purchases with their smartphones from any online retailer without entering a user name and password. Billing Revolution charges merchants, app developers and other companies using its platform a flat fee of 15 cents per transaction, regardless of the transaction’s value. The fee is considerably less expensive than carrier billing or app-store payments, which often charge processing fees in excess of 30 percent.