Sometimes a text message just takes too long to type. And sometimes a phone call just seems like too much of a commitment. Well, for any time-conscious commitment phobes at this year’s SXSW, HeyTell was the go-to app.

Think of HeyTell as a walkie-talkie. The free iOS and Android apps allows you to send brief voice messages to fellow HeyTell users by simply pushing a button that says ’Push to Talk.’ Have something to say after-the-fact? Just send a follow-up voice message and rest assured that your HeyTell buddy will receive all your messages, in the order in which you sent them.

You can spice things up by sending a voice message to a wider group of friends, or adding effects to your voice. "I feel like a kid again with HeyTell," said Techcrunch’s MG Siegler in his coverage of the event.