I use Proton Calendar as my Calendar on laptop and Samsung phone. I read article praising the Samsung REMINDER app and how it works in coordination/integrated with Samsung's calendar - similar to how Google Tasks works with their calendar. I use Samsung's CLOCK app for reminders, but it is not a great tool for that purpose. Proton has been making very good tools that are included with my DUO/FAMILY package and I would love if you could add this to your portfolio.
Article describes this "https://www.howtogeek.com/samsung-has-a-google-tasks-rival-and-its-my-favorite-to-do-app/?utm_source=HTG-NL&utm_medium=newsletter&utm_campaign=HTG-202511100645&user=amZhem55dHJpYWxAcHJvdG9uLm1l&lctg=b5b5ba25038d731f0c366f7e34f494a9f9400e3980a2403c7aee6d19de31e181".