MyDoge aspires not to charge any fees. If we do one day, our fees will be clearly delineated. However, you must pay a network fee to send a Dogecoin transaction. This fee is paid to miners who process transactions and secure the Dogecoin network. MyDoge tries to calculate the lowest possible fee for your transaction and displays the fee on the confirmation screen, the last step before making a payment.
We are constantly working on improving our app to calculate the lowest possible network fee. The usual fee to send a Dogecoin transaction is ~0.0025 DOGE, but the fee can vary depending on the specifics of your transaction and network conditions.