Perhaps not my go-to mobile payment platform, Google Wallet can still be useful for some users, especially those with Gmail accounts.
Google Wallet allows you to email money to others, but you have to do it from a Gmail account. That's not really the difficult part, though. Setting up a Google Wallet account takes a bit of effort and you have to enter in way more information than what's probably needed, including your home address and the last four digits of your Social Security number.
Google Wallet also charges 2.9% for debit cards, while other mobile payment platforms do not, so you'd have to connect a bank account to it if you wanted to send money for free.
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