An advantage of Square Cash is it uses email as a proxy, and you probably already know your friend's email.
Welcome to Europe 15 years ago
I wouldn't say Apple Pay is a threat to Square Register. If anything it might even drive POS upgrades which Square could benefit from. Having said that, Square does need to diversify beyond POS systems and payment processing, and Apple Pay puts another nail in the coffin of Square's foray into payment instruments (Square Wallet), which they already pre-emptively killed.
Unfortunately Square Cash operates at a loss. If it were possible not to operate at a loss there'd be a million competitors overnight.
http://www.interac.ca/index.php/en/interac-etransfer/etransf...
Our millions of sellers will be able to accept any form of payment that comes across the counter, including Apple Pay!
You can put $45 in an envelope and have it delivered in 1-2 days.
On top of that, Square Cash is right now the absolute easiest way to send somebody money. Just a moment ago I sent a friend $45 in less than 60 seconds with a single email. Instantly I'm emailed back with a confirmation that the cash will be in his account in 1 or 2 days. In my experience he'll have the cash tomorrow.