German mobile publisher and developer HandyGames added in-app purchases and SponsorPay offers to its freemium game Super Dynamite Fishing for Android and iOS. The new in-app store allows players to buy in-game currency, remove the ad banners and earn additional in-game currency by completing SponsorPay offers.

“In-app purchases and SponsorPay are a great way for players to make the game a little easier,” explained Markus Kassulke, CEO at HandyGames. “We would also like to stress that this does in no way game impact gameplay negatively. Super Dynamite Fishing is still fully playable without having to spend any money. It’s purely optional,” Kassulke added.

Freemium apps with in-app purchaes are expected to further surge: According to a new report by Juniper Research, worldwide revenues from in-game purchases totaled $2.1 billion in 2011 and are projected to exceed $4.8 billion by 2016.