Yes of course, but why would you want to acelerate your transactions? you can just set a normal fee before sending the payment, ussually those accelerator services are expensive, there isn't any of them who will do it for you for free, most of them ask for $5 before accelerating the transactions.
You can just set a fee of $2,5 and the transaction will get confirmed in less than an hour.. i dont understand this kind of people who want all for free.