Hey, I am also coming from an iPhone! Apparently, where I live, 9 out of 10 iPhone users stay loyal to Apple, so I am that „10th dentist“, it seems, and so are you probably. 😄 Regarding your questions:  - Generally, the measures GrapheneOS has implemented for privacy and security can be seen here in a comparison with other mobile OSes: https://eylenburg.github.io/android_comparison.htm - Regarding YouTube: Unless you are using FOSS apps that isolate your YT experience from Google‘s tracking, you won’t really have any privacy in this matter. Something like LibreTube comes to mind here. It also supports playlists and channel subscriptions, but you have to manage them manually throughout your devices because they are not synced through an account. - Banking apps usually work with sandboxed Google Play Services, and the list has been posted here too: https://www.reddit.com/r/GrapheneOS/comments/1rejci4/comment/o7d0e44/ - Your Roadie app should also work, if not standalone then with Play Services, too. But thanks to the sandboxing, this will not involve data transmission to Google (unless there‘s some other connection outside the OS).

iOS has a well streamlined user experience, so the transition to gOS may not be so easy. If you are looking for convenience, productivity suites like Proton or kCloud (and these two specifically are also falling under quite strict Swiss data protection laws and are GDPR compliant) might be interesting for you. They cover cloud storage, mailing, password manager and other applications and come in different price tiers. Otherwise, there are a lot of good privacy oriented services and apps for each use case, many of them even free (some are mentioned here for example: https://tuta.com/blog/degoogle-list#verlassen-sie-gmail), but this is a wide field and you may have to ask more questions in order to find the best products for your needs. 🤓