Zello is a comprehensive frontline communications solution powered by push-to-talk technology. It offers a walkie-talkie app that functions over cell networks and Wi-Fi, eliminating the need for expensive radios or towers. Zello's features include unlimited private channels, message history, emergency alerts, transcription, and translations. The platform is popular among first responders and is used in industries like aviation, retail, transportation, construction, manufacturing, hospitality, and emergency response. Its Mobile SDK allows integration of these advanced communication features into other apps, supporting both iOS and Android devices.