I tried this on a Pixel 6. Perhaps someone on that model could try to rule out any weirdness?

    matchboxbananasynergy Experiment time: try installing the app via Aurora Store instead of Play Store.

    Tried that. Still stuck.

      matchboxbananasynergy I tried this on a Pixel 6. Perhaps someone on that model could try to rule out any weirdness?

      I now installed the app on a Pixel 6a I had lying next to me, incidentally, and it launches fine. Same version of GrapheneOS and Play Services.

          Its good to hear that we at least have it isolated to older generations. Unfortunately I don't have an additional device to test it on stock

          matchboxbananasynergy Bingo. Next step is for someone to try it on one of the later generations on stock, I guess.

          I asked people in the community chats if they could help test the app on stock PixelOS. I got this response from a user:

          App doesn't work with stock on my pixel 8 pro
          Just sits on a screen with the logo on it forever

          @BlingoDangoDingo It looks like this is an issue with the app itself and not specific to GrapheneOS. I suggest you report to the app developers that their app is unable to launch on Pixel 7 and Pixel 8 devices. (It might be the case for Pixel 9 devices as well but no one has tested that).

          BlingoDangoDingo Its the only method of payment/gym access/account management.

          I remember the good old days when you could go to the gym, sign a contract and pay with a credit card or by bank transfer, and then being issued a physical access card. Those were the days!

              Good morning all, thank you @fid02 for asking out into the community. I've sent some emails off to the developers, and I'm going to contact the gym this morning. Hopefully it's just a simple update. I'm with you on that one, I miss the old days too. I was taken aback that they didn't even offer paper/pen as a backup. No going back I suppose

              6 days later

              Well I reached out to the developers/gym owner, and the consensus between both of them was that there was no reported issues with this app on newer android devices. Seems that I may be out of luck unless there's something GrapheneOS can do to ensure further compatability.