Every blockchain network is designed so that the sender (the one who signs the transaction) has to pay a fee for each transaction. Fee size is not fixed and depends on the current number of transactions.
In OWNR wallet you can set a priority for any of your transactions by choosing one of the three fee types:
In most cases, Average fee is enough for miners to put your transaction into the next block. However, sometimes the number of transactions in the network may increase rapidly within a couple of minutes. In this case you may set a higher fee for the transaction to be confirmed faster (30-60 minutes).