Mobile payment startup Square has updated its Register app with several new features. Both the iPhone and iPad versions of the app can now record and track payments, including checks and gift cards.

If you've ever been to a political rally and thought, "This is cool but I wish there was some way for me to make a donation right now with my credit card," then Mitt Romney is the Republican candidate ...

Square Inc, the payment start-up co-founded and headed by Twitter Inc's Jack Dorsey, is in discussions with banks about an initial public offering, the Wall Street Journal reported on Wednesday, ...

Starbucks will soon no longer take Square's mobile payments in its stores, nixing a key aspect of the partnership the companies announced in 2012. It will develop its own mobile ordering solution ...

Square is a payment processing platform with built-in POS and business management tools for in-person and online sales. Here’s how it works, what it costs, and its ideal use cases. Key takeaways ...