Hey @Jessica Fondaco,
The RingCentral app has both meetings and phone in it, along with messaging. It's the all in one app. You can definitely use it to replace having the meetings app. For the phone app, there are some functionalities still being developed for the unified app that the phone app already has. The major one of these is HUD.
If you don't use HUD, I would say you are good to remove the phone app as well, and just use the unified RingCentral app. You could leave the phone app on your desktop/mobile, and try only to use the unified app. If there is a feature you notice is missing, then you'll have the phone app to keep using, but you should be all set for the most part.
The reason that there are three separate apps, is that the RingCentral unified app is new-- at one point there were three apps: one for meetings, one for phone, and Glip for messaging. Over the last couple years, our product team has been working on combining into the one app known as the RingCentral app.
Hope this helps, let me know if you have other questions!
