On Android phones. iPhone doesn’t have this privacy deficiency.
Recently, they released a major update to their LLM feature and I installed the app to check it out. While I had the app installed, every time I checked the mobile website there was a large banner directing me to go to the app. Ad blockers and distraction blockers would not get rid of it. When I deleted the app again, it was gone. What gives? Why does the mobile website know whether I have the app installed? How come content+distraction blockers are enough to block all reminders to use the app when it's not installed, but are irrevocable if I have the app installed?
To clarify - the mobile website doesn’t. It has meta tags that tell safari what app it’s tied to, and safari displays associated the app banner.