What are the best mobile apps to study for exceptional UI, animations, and UX?

I'm a mobile app developer (Flutter) looking to improve my UI/UX and animation skills by studying well-designed apps.

I'm not necessarily looking for the most popular apps—I want apps that genuinely feel polished and thoughtfully crafted.

Things I'm interested in:

• Smooth page transitions
• Micro-interactions
• Premium-looking UI
• Great scrolling performance
• Beautiful onboarding flows
• Creative navigation patterns
• Well-designed bottom sheets, cards, and gestures

I've already looked at apps like Airbnb, Spotify, Duolingo, and CRED.

What other apps made you stop and think, "Wow, this is incredibly well designed"?

They can be from any category (finance, shopping, productivity, social, health, etc.). I'd love to hear your recommendations and what specific UI or interaction you think they do exceptionally well.