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Square card readers
1 creator use or recommend it
1 use
Last discussed Mar 29, 2026
Early Square payment processing dongles that plugged into iPhone audio jacks for credit card payments
Recently discussed in
Tony Xu: Building DoorDash from a Startup to a Giant
Tony · Mar 29, 2026
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"I had these card readers which was one of their earliest products. These wide dongles that you could stick into the audio jacks of iPhones and that's how we would collect payment."
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