You do not need to download the Rootpa application on your device since it’s pre-installed. But if you removed it or are not able to find it. You can also download the app for other brands by simply searching for Rootpa along with the brand name. However, we would not suggest you install any random apk on your device unless you know what you are doing. If you download and install malicious apps from the internet, then your phone can be hacked and personal data will be leaked.