I just started my adventures with GrapheneOS and have some problems with knowing what apk to choose when I download from github. My problem is when I try to download simplex chat, and I find 3 different suggestion for downloading. One is apk, one is v7a and one is called aarch64. I tried to research a little, but don't find anyone answering this. I hope someone can explain this to me, as I am afraid it won't be thr only time that I will be presented more than one option when I try to download apps.
Hope someone can explain this for me