other8026 I have not flashed GoS onto my replacement device since acquiring it, but it's been less than a month since I've last used it and grindr. I was on a pixel 7, and running stock Pixel 7, I can still access it. If you are able, Make it back up, flash stock, and if you are able to download and access then it is certainly available to the Device as a whole.
To my knowledge, unless it has been changed within the last month, it is not dependent on integrity checks.

I would potentially suggest entering safe mode and trying to download it that way, however Play store is not a system app so it will be disabled as it would be a user app.

You could potentially install Aurora store and spoof to a pixel 6, if you are able to access it then it is most likely a permissions issue that you have set for play services system framework and Play store.
I have extensively used this app since I have owned my Pixel 7 running graphing and I have run into absolutely little to no issues , except when running a VPN. This however is intended as it is usually standard for a chat application that shows you surrounding people whereby running a VPN will obfuscate your true location and be prone to abuse.
Other things you could try;
Clear Google Play Store’s Cache and Data
Ensure you have the latest GoS update installed
Delete Google Services Framework’s Cache and Data
Sideload the “Incompatible” App (please ensure the APK and website you pick is a reputable source as sideloading can carry a risk if you install an infected version)
Reinstall GrapheneOS and try again

  • alx replied to this.

      N3rdTek Thanks. The impossibility to install the app indeed started less than a month ago. You may have stopped using GOS before this change happened. Already tried to reinstall the Google stuff (as per your earlier advice), no change. I'm not willing to engage in more invasive actions such as flashing my phone just for this app :) I'm pretty sure this is about the device not being "certified" when running GOS. The "support" team never wanted to tell/confirm this, despite my requests about this, which were simply eluded. What a poor customer service.

      other8026 Thank you too for taking the time to try this. At least, I can now be pretty sure this is not specific to my device or account.

          19 days later

          Just want to echo that I am unable to download grindr from the place store as well with the "This app won't work for your device" message with gos on a pixel 6 pro.

            I would just repeat steps that should work:

            1. install the google trio from apps with internet permission
            2. launch google play, grant it permissions, maybe log in
            3. install aurorastore from auroraoss.com to bypass OS block
            4. download that app, launch it. If not working step 5.
            5. stop it, clear all app data.
            6. If not working, try disabling a VPN, step 5.
            7. If not working, try enabling sensor permission, step 5.
            8. If not working, try enabling native code debugging, step 5.
            9. If not working, try disabling hardened malloc, step 5.
            10. If not working, try disabling exploit mitigation, step 5. (This should be avoided!)

            If the app still doesnt work it may use Safetynet for whatever reason. Guide them to GrapheneOS attestation info.

              5 months later

              Grindr still doesn't work even after all the fixes. During the login it says there was a problem connecting with Google Play Services for some reason. I lifted all of the exploits, gave google play services all the required permissions, installed app from google play etc. but it just won't budge. It was working fine few months ago but it suddenly stopped working for some reason.

              Ok I might've found a solution to this problem by accident!

              It took my few hours to get this done but it seemed to work. This is what I would see when I tried to login: https://snipboard.io/MRU0Ly.jpg and I finally got it fixed.

              Before I explain what I did we need to change some settings first so we're on the same page. Maybe this could work for you before moving to the next solution so try this first and then move on to next step f it doesn't:

              - Go to Settings -> Location -> Location services -> Turn on both Wi-fi and Bluetooth scanning
              - Go to Settings -> Apps -> Sandboxed google play -> Turn off option "Reroute location requests to the OS"
              - On the same screen from above - go to Play services app info -> Permissions -> Make sure sensors and network permissions are on
              - Go to Settings -> Apps -> Grindr -> Turn off option "Exploit protection compatibility mode"

              Didn't work? That's fine. It initially didn't for me too but this is what I have done to make it work (keep the changes made above):

              1. Uninstall Grindr completely from your phone first(!)
              2. Install F-droid if you haven't already
              3. Go to settings in F-droid: Settings -> My Apps -> Repositories
              4. Click plus icon below and add this repository manually: https://microg.org/fdroid/repo. This will give you access to apps like microG companion, services and Framework proxy
              5. Search for those apps in search bar individually, press on them and uninstall each and every one of them
              6. Go to "apps" application provided by GrapheneOS and install Google Services trio
              7. Go to google store and login
              8. While in google store - install grindr and try to login again in the app

              Let me know if it worked for yall because it sure did for me

              • alx replied to this.

                Laggex Thanks for sharing!

                On my side, the Play Store still won't allow to install the app. It's pretending that "this app won't work for your device".

                I'm facing the same behavior with a public transportation app (same message displayed by the Play Store). Both started to be affected at the same time (mid-december 23).

                    alx Does it also happen when you install it from Aurora Store?

                    • alx replied to this.

                        Grindr is a buggy hell hole of an app. I'm surprised that people cling so hard to that app, when there is alternatives 🤷

                        Laggex None of the two apps (Grindr or the public transportation app) is showing in the search result of Aurora.

                            hdishs I'll try but it seems you need to install Xposed which in itself requires root privileges

                              alx what about downloading .apk from apkmirror or something like that?

                              • alx replied to this.

                                  Laggex I do not trust those sites :) The APK could be altered in some way.

                                    I had the Pixel 6a and couldn't install via Google Play because "app won't work" message.

                                    The Pixel 8 installs just fine at first instance. Then I created a user profile and failed to install with "unknown error" after downloading via Google Play.

                                    I then tried on Aurora Store. Failed:

                                    Invalid or corrupted APK
INSTALL_FAILED_VERSION_DOWNGRADE: Downgrade detected: Update version code 124716 is older than current 125314.

                                    I did a manual download with a version code 125314 and it installed fine.

                                    I have no idea what just happened. Did it try to download an older version when a newer version is available?