WhatsApp

Chat with friends, send pictures and avoid SMS charges with WhatsApp. This unique texting app uses data to send messages, including videos and audio messages. It's perfect for travelers who want to avoid roaming charges while staying connected through hotel Wi-Fi or ex-pats with friends and family in multiple countries. Users can also make unlimited phone calls as long as they stay connected to data, although 911 and other emergency numbers are not available through WhatsApp. Any smart phone can download WhatsApp for free data-based communication, so friends can stay in touch whether they use Android, iPhone or another brand. WhatsApp is packed with features, including emojis, location pins, an address book, wallpapers and custom notification sounds, chat history and everything else users expect from a texting app -- except expensive SMS fees.