"Select Play Partners" can block unofficial installation of their apps.

You might sideload an Android app, or manually install its APK package, if you’re using a custom version of Android that doesn’t include Google’s Play Store. Alternately, the app might be experimental, under development, or perhaps no longer maintained and offered by its developer. Until now, the existence of sideload-ready APKs on the web was something that seemed to be tolerated, if warned against, by Google.

This quiet standstill is being shaken up by a new feature in Google’s Play Integrity API. As reported by Android Authority, developer tools to push “remediation” dialogs during sideloading debuted at Google’s I/O conference in May, have begun showing up on users’ phones. Sideloaders of apps from the British shop Tesco, fandom app BeyBlade X, and ChatGPT have reported “Get this app from Play” prompts, which cannot be worked around. An Android gaming handheld user encountered a similarly worded prompt from Diablo Immortal on their device three months ago.

Google’s Play Integrity API is how apps have previously blocked access when loaded onto phones that are in some way modified from a stock OS with all Google Play integrations intact. Recently, a popular two-factor authentication app blocked access on rooted phones, including the security-minded GrapheneOS. Apps can call the Play Integrity API and get back an “integrity verdict,” relaying if the phone has a “trustworthy” software environment, has Google Play Protect enabled, and passes other software checks.

Graphene has questioned the veracity of Google’s Integrity API and SafetyNet Attestation systems, recommending instead standard Android hardware attestation. Rahman notes that apps do not have to take an all-or-nothing approach to integrity checking. Rather than block installation entirely, apps could call on the API only during sensitive actions, issuing a warning there. But not having a Play Store connection can also deprive developers of metrics, allow for installation on incompatible devices (and resulting bad reviews), and, of course, open the door to paid app piracy.

  • @[email protected]English
    46•2 months ago

    I get most of my stuff via F-Droid or I could use Obtainium. My tablet is Google-free. This sounds like my phone should be Google-free as well.

    • @[email protected]English
      18•2 months ago

      Yeah but banking apps are starting to check integritynet, and (in France, at least) they’re pretty much mandatory to do anything useful with your bank account/credit card online… I think Uber does too, I boycott them but others might follow suit…

      Currently running lineageos, but I think I’ll just give up and go for a Pixel for my next phone… Sucks to let google win but I like to do useful things with my phone…

      • @[email protected]English
        4•2 months ago

        I use a hardware TAN generator though I also have a banking app as a fallback on my Lineage OS phone. If I ever buy a Pixel it’s only to install Graphene OS on it.

        • @[email protected]English
          3•2 months ago

          Sadly most French banks use a custom validation process which requires you to use their app to validate a transaction. And my main bank’s app has warned me that it will “soon” stop working on custom ROMs…

      • @[email protected]English
        2•2 months ago

        You can still pass play integrity with a rooted phone/custom ROM. Mine is currently passing with strong while rooted.

        • @[email protected]English
          1•2 months ago

          What do you use? I rooted my phone precisely for this, but google pay and my bank still see I’m not on the stock ROM : (

          • @[email protected]English
            2•2 months ago

            I’m currently using APatch, PIFork in script-only mode, and Tricky Store with a leaked keybox.

            If you need to spoof for apps you’ll need some other stuff. For APatch there’s a thing called Cherish Peekaboo, for KernelSU you can use Shamiko. These will do their best to hide the fact that you’re rooted from apps. There are some detector apps that can help you fix things that apps might see, but there not entirely needed.

            Also since you’re not on the stock ROM, you’ll need to spoof your props so just use the regular Play Integrity fix.

        • @[email protected]English
          5•2 months ago

          You can’t in some countries. Like if you want to wire something, or setup a payment you have to use the app. It’s mandatory. If you go through the website it ask to open the app to confirm it’s you.

          • @[email protected]English
            3•2 months ago

            So people that only have a computer and not a smart phone can’t do those things at all?

            • @[email protected]English
              3•2 months ago

              Unfortunately it will, if I want to add a new transfer recipient or make a payment on a 3D secure website, the app is mandatory, even on desktop.