I have always installed apps from the official store but today I wanted to install an app from SlideMe so I clicked "download" but it didn't install automatically. It just downloaded an .apk file and then a window popped up with two options called "Google installer" and "package installer"..how do I proceed? I have an unrooted S3.

OS: 4.1.1

2 Answers 2


Choosing the Google installer option will verify the application with Google before installing. Choosing the Package installer option will install the application as is. Since I like to be safe, I installed AVG Antivirus from the Play Store. A third option will be to scan the package for viruses before installing.

  • Whst's the "choose unknown sources" on your phone people keep talking about?
    – verve
    Aug 29, 2013 at 0:59
  • this is a setting in options you need to enable to be able to install non-market apps (.apk)s.
    – user24200
    Aug 29, 2013 at 1:00
  • If I choose the Google installer it will not install if the Play store has banned it yes?
    – verve
    Aug 29, 2013 at 1:18
  • That I'm not sure about. I just scan for viruses and install.
    – user24200
    Aug 29, 2013 at 1:19
  • Google Installer and Playstore are two different pairs of shoes. The installer is part of the GSF (Google Services Framework), Playstore is another (specific) app. Btw: Anti-what? Well, it cannot hurt to check with it, but I wouldn't rely on the results. There've been quite a lot reports lately on that topic, and I'm not a good friend of such AV-apps. But that's my opinion ;)
    – Izzy
    Aug 29, 2013 at 6:22

How do you know you can trust that the app you wish to install will not contain malicious code?

  1. Source-

Consider where you are downloading the application from.
Take the Google Play Store for example: Considering that GPS has been plagued with malware, ( https://www.forbes.com/sites/zakdoffman/2020/07/09/ldangerous-android-malware-warning-google-play-store-security/?sh=736c8ba61f9e ) how do you know that an app installed from GPS is safe? Here we can see the value is of using reputation as a metric:
Much like a lender uses an individual's credit score before assuming the risk of lending them money, end user reviews of an app too can help gauge many factors regarding an application, including assessing its inherent safety on your device (not to mention mited to if ads will be present snd if so, how many/frequent). Google Play Store utilizes this by allowing end users to provide their feedback of facts and opinions of an application through a text based data entry which is then added to an archive ( or 'database' so to speak) of user reviews that is not only accessible to other end users but uses a 5 Star scoring system to display a mefian score, ultimately reflecting the average opinion of the end user in regards to an application (available on a 'per application' basis.)

While reputation is helpful it does not rule out the possibility of harboringbmalicious code or preventing its execution. This is exactly why applications hosting services such as F-Droid and professional developers as seen on XDA only trust applications that offer 100% transparency. How do they do this?

  1. SOURCE-

An application that offers its source code to be accessible publically, when found to be malicious, (whether to be built from and or for review etc,)isn't going to last very ling without being flagged by the FOSS community and thus shut down /stopped. ..which is one of many benefits to supporting open source projects, and one of the reasons I continue to trust application repositories like F-Droid, The Gaurdian Project and Arora Store, (so much so that I have installed and continue to use the F-Droid app and the Aurora Store app.)

In conclusion, you can trust the indtallation of an application whose source code is publically available to be reviewed and has a positive reputation from the community that installs and utilizes it.

  • I'll have to disagree with the reputation section of this answer. Many malware apps have millions of users and excellent reviews. Dec 21, 2020 at 6:08

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