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Finally, Google will show some useful info about your trial. When it begins, when it ends and how much you will be charged after it ends. Note that currency and exact price including taxes depends on the country you reside. If you want to cancel your subscription before the trial period ends, you can do so easily from Google play - Subscriptions and you will not be charged anything. Google will also email you a couple of days prior to ending in case you forget, to make sure you won't be paying accidentally. We are certain though that you will love Spark after trying it!