Although this free app doesn't function primarily to text for free, it's one of gottaTXT's perks. The app sends text messages with your location, and automatically updates on a Google map. (You can choose how often your location is updated.) Plus, when you're busy, you can set the app up to automatically respond to incoming gottaTXT texts. But here's where this app is relevant: If you have texting on your phone and you don't want to pay for texting on your child's phone, they can piggyback on your phone as long as they have a Wi-Fi connection, allowing them to send and receive texts for free.