and also You can upgrade to RingCentral MVP at any time. To use this app no credit card required and it is only available in the US. You can easily use the RingCentral app as a messenger to chat with others before, after and during the meeting for easy business communication. You can easily do video calling for 24 hours unlimited time. or also you can upgrade to host the 200 people. It gives the free version to connect with up to 100 people. How do I put the RingCentral app on my desktop?.Do I need to download RingCentral to join a meeting.Ringcentral app download for PC, Laptop Windows/Mac.Ringcentral app download for iOS (iphone).