I work with UnionBank.
EON is actually designed for the techie and young professionals. Most of these people use this card to make purchases or transactions online. The same with other UnionBank online accounts, you can make transfers to other bank accounts for a one-time fee of only P10.00 regardless of the amount you transferred.
This is a zero-maintaining balance. But, you have to pay an annual fee of P350.00 only to cover bank services to you. As a Zero-balance Savings Account, (the downside) you are only given two free withdrawals on a month using any UnionBank ATM machine. The next withdrawals will be charged at P10.00 per transaction. If you withdraw to a non-UnionBank ATM, you will be charged P12.00 per transaction. If you reach P10,000.00, regular bank interest will be applied to your account.