Zello

Zello provides push-to-talk apps with live voice chat features for consumers and businesses.

Zello is a free social walkie talking app with 55 million registered users. The app is available for iOS, Android and BlackBerry devices and Windows PC. It allows anywhere from two to 1,000 users to have instant, live conversations with. Zello works with Wi-Fi and data plans. Users can talk one-on-one, start a channel (like a group) or join one of thousands of existing public channels. The app is available in more than 20 languages, which lets people to connect globally. Zello@Work is for companies needing a secure private network and looking to replace two-way radio. It has a web-based console and works with Windows rugged devices. The service is free for up to five users.