A comprehensive tutorial for building a full-featured video calling study app using React Native and Expo SDK 55. Covers project setup from scratch, NativeWind (Tailwind for React Native) integration, authentication with Clerk (Google, Apple, GitHub), real-time chat and video calls via Stream, and error monitoring with Sentry. Also includes a detailed breakdown of Expo SDK 55 changes: removal of legacy architecture, native tabs as default, faster OTA updates via bytecode diffing, new native UI features, and iOS widgets in alpha. All tools used offer free tiers, no credit card required.
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