The legacy version of Parallels Clients should be used with Parallels Remote Application Server v15.0 and older.

The new mobile client (iOS/ Android) should be used with Parallels Remote Application Server Version 15.5. The Parallels mobile client is approved for the following Operating Systems

• iOS 8.0 or higher (iPhone and iPad)
• Android 4.0 or higher

and can be downloaded from here:

• iOS: https://itunes.apple.com/app/id1129911695
• Android: https://play.google.com/store/apps/details?id=com.parallels.client

More information regarding the new mobile clients:

• How to migrate settings to mobile Parallels Client v15.5 : read more
• How to add a new connection in mobile Parallels Client v15.5 read more
• How to define Proxy settings in mobile Parallels Client v15.5 read more
• Using mobile Parallels Client v15.5 read more