Hi there,
i switched to a Pixel 7 and installed grapheneos yesterday, coming from years of using Apple. Everything is working fine but one App is always crashing. Google services are installed and i even reinstalled them multiple times. I only have one profile on the device. I already enabled Exploit protection compability mode and the app also has network and sensor permissions.

The App is called: MVV muenchen
https://play.google.com/store/apps/details?id=com.mdv.companion

It's for my online train ticket which I need on a daily basis.

Thanks in advance for any help!

    MattD Hey there. I've been testing this out on my end and getting the same results, unfortunately.

    When I tap on the app, it crashes soon after, with no crash log or anything of the sort.

    This is on a user profile with Sandboxed Google Play installed through Aurora Store. Did you also install it through Aurora Store? If so, could you try installing it through Play Store itself? Sometimes that matters.

    I also tried the following:

    • Made sure native code debugging in Settings > Security was enabled.
    • Disabled secure app spawning just in case.
    • Tried Exploit Protection Compatibility Mode, which means it's unlikely to be a memory corruption bug.

    Let me know how it goes with the Play Store, and we can look further into it.

        MattD The next step might be an inconvenient one, I'm afraid, but it would make sense to see if the app functions fine on Android 13 Stock OS.

        There have been a few instances where an app was misbehaving and it turned out that it wasn't GrapheneOS-specific at all in the end...

            Yes, I can't get this app to work either. No matter what I do..

            I searched a little bit in the reviews, but I cannot find someone complaining about crashes. (But they're complaining about much other stuff.... ;-) )

              For a short-term solution, even thought it's not as good as using the native app: You could use Transportr app. It covers all Germany and when I was visiting Munich it covered the network in Munich quite good.

                sugseg52 sadly this doesn't help me as i have my monthly ticket on the MVV App which i need in order to use the train/bus.

                  Beerman i know the app isnt the best but it's the only app on which i can buy the online ticket for my daily commute (train/bus) so i really need it :/

                      MattD Of course this isn't a solution, but do they allow you to do that through their website, or do you have to use their app?

                          For what it's worth, I did some more testing and tried their beta app, and I also tried in a profile without Sandboxed Google Play, just in case... no dice.

                          I'm leaning towards this being SafetyNet/Play Integrity API related, so you'll need to reach out to them and update us if they get back to you.

                          I know this is not ideal, but our hands are tied...

                            matchboxbananasynergy I found a solution for the next week (after next week I can buy the ticket in paper so i dont have to use the App), i installed the phone App on my MacBook (thanks to the M2 Chip I can install iPhone Apps trough the App Store) and now I can have the ticket on my Laptop xD. It's not the greatest solution but it works so I'm not complaining haha. Thank you anyway for taking your time for testing this for me!

                              MattD

                              Maybe it´s possible to you to switch to one of these 2 apps, where you can buy tickets for Munich and the surrounding area:
                              https://play.google.com/store/apps/details?id=de.swm.mvgfahrinfo.muenchen
                              https://play.google.com/store/apps/details?id=de.hafas.android.sbm

                              The frst one, I´m using myself. The second one, I tested and seems to be working.

                              matchboxbananasynergy

                              Is there any way to find out why the app crashes? Maybe we can learn from it for other apps how to debug in such cases and it could be that other apps don't work for the same reason.

                                  Please mention what device you have if it doesn't work for you. I have just tested this on my Pixel 4a and the app seems to work. I don't have an account so I can't test further.

                                  • Owner profile
                                  • MVV-App versionCode: 602984013
                                  • Play services version: 22.41.13
                                    • Play services permissions: Network, Sensors
                                  • Exploit protection compatibility mode: disabled
                                  • Settings > Security > Native code debugging: enabled
                                  • Settings > Security > Secure app spawning: disabled

                                    DeletedUser80 Do you just generally have secure app spawning disabled, or did you find that it was needed for this app to run?

                                    I've been testing on a Pixel 6, by the way.

                                      Yes, I tested again:

                                      With "Secure app spawning: disabled" the app is running.

                                      If I enable the option again, the app crashes.

                                      (Pixel 7 Pro - No other option changed)