The Square payment system hasn't exactly had a smooth road to availability, with deliveries put on hold back in June due to an ominous "credit processing and risk issue." If that didn't scare you away ...

We reported on the dongle-based audio signal credit card reader for iPhone and other connected mobile devices a short while ago, which has been pioneered by Twitter creator Jack Dorsey. Square uses a ...

Accept credit cards on your phone using mobile readers and apps from Square, PayPal, or Chase. Download the app, connect a ...