Notifications are the lifeblood of modern apps. They re-engage users, keep them informed, and build trust. But most apps rely solely on push notifications—without an in-app inbox, critical updates can easily be lost. Push notifications grab attention in the moment—perfect for a flight delay, an account alert, or a message from a teammate. But they’re fleeting—once dismissed, they’re gone.

I've been making apps since just after the App Store launched - it's actually what made me want to make apps in the first place. Looking back over this journey, it's amazing to see how much has changed. Let me take you through this evolution, because what's happening right now in mobile development is absolutely incredible.

Twilio powers communication for over 10 million developers and 300,000 businesses worldwide. As a leader in customer engagement, they’ve set the standard for seamless, scalable developer tools. But as their business grew, managing notifications became a challenge. Fragmented tools and workflows created inconsistencies and inefficiencies across teams. To solve this, Twilio turned to Courier—a platform designed to unify notifications and improve the developer experience at scale.

This month, we’re rolling out updates to our mobile SDKs with a focus on usability, reliability, and developer experience. Here’s a breakdown of the latest improvements for iOS, Android, React Native, and Flutter.