Android In-app Currency -

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i have started working on android project , wondering if there pre-exsiting way of implementing in app currency e.g coins or diamonds because wanted allow user use features of app depending on amount or value of the currency user has.such enabling or disabling buttons.from have learned far use new database , store data value in file there i'm not sure have come here asked because have searched internet , have had no luck in finding way , in advanced.

you can try library, guys did great work there.


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