Amazon has added another tool to its long list of services - a video conferencing and chat app. Called Amazon Chime, the app uses on-click dialing and boasts noise-cancelling technology for clear conversations - and can be used on Windows, iOS and Android devices. The new release is the Seattle-based firm's latest weapon to compete with the likes of Skype for Business, Cisco's WebEx and GoToMeeting. The service will call all of the participants when a meeting starts, allowing users to join the call with just a push of a button in the app – and no PIN is required to access the room. And, those who are running behind can tap a'running late' button to automatically notify everyone in the meeting.