Skype Room Systems Beta is the mobile app for Polycom Roundtable 100
Polycom Roundtable 100 is a meeting room device that Microsoft and Polycom are jointly building. This app is the mobile companion app which serves as your remote control for the Polycom Roundtable 100 device. The device is not in market right now, and is under testing. You need a Skype for Business account, and the device to be able to use this app.
For more information: http://www.polycom.com/forms/polycom-roundtable-100-for-skype-for-business.html
Please note this is not the app if you want to Skype for Business/Lync on your Android phone.
If you’re looking for the core Lync 2013 / Skype for Business Android application, you can find it on the Play Store here: https://play.google.com/store/apps/details?id=com.microsoft.office.lync15