You will need software to open .rar files, such as WinRAR or 7-Zip . Right-click the Android_Assistant_v4.0.rar file.
Select or "Extract to [Folder Name]" using your archive software. 4. Install the Application Open the extracted folder. Download Android Assistant4 rar
Since this is an older application, it is unlikely to be on the Google Play Store. You will need to find it on a third-party repository. You will need software to open