Courier Inbox iOS SDK 5.7.3 – Improved Reliability and New Listener API
Mike Miller
March 27, 2025
We’ve just released version 5.7.3 of the Courier iOS SDK — a major update for teams using Courier Inbox to power in-app notifications on iOS.
This release improves performance, reliability, and gives you more flexibility to build the experience you want.
Highlights
Stronger socket connection handling
Real-time delivery is now more reliable when switching between foreground and background — ideal for mobile apps with dynamic in-app messaging.
New threading model with CourierActor
All Courier.shared functionality now runs on a dedicated thread called CourierActor. This keeps SDK work off the main thread and improves performance across the board.
Fully rebuilt inbox datastore
We’ve rebuilt how messages and events are stored and managed — all now handled exclusively within the CourierActor. This ensures greater reliability and data accuracy.
Simplified listener events
Listening for inbox updates is easier than ever. The new onMessageEvent callback lets you respond to message-level events — giving you the tools to build custom UIs without added complexity.
More tests, more confidence
We added new unit and integration tests to back these updates and support future releases.
Similar resources
What’s Next for Courier Create: Push, SMS, In-App, Internationalization, and More
Courier Create makes it easy to embed a powerful notification editor into your app. Now, we’re expanding what’s possible—adding support for push, SMS, in-app notifications, internationalization, test sends, and more.
By Thomas Schiavone
May 01, 2025
Courier Create: Embed a Custom Notification Editor in Your App
Courier Create lets you embed a powerful template designer and email editor directly into your React app. Give your customers full control over notification content, branding, and delivery across all channels — without building custom infrastructure or managing fragile integrations.
By Thomas Schiavone
April 30, 2025
Better Observability and Faster Debugging with the New Logs Visualization
Debugging notifications used to mean hunting through logs to find patterns. The new logs histogram in Courier gives you an instant view of message trends, making it easy to spot spikes, failures, and diagnose issues faster.
By Thomas Schiavone
February 25, 2025
Build your first notification in minutes
Send up to 10,000 notifications every month, for free.
Get started for free
Build your first notification in minutes
Send up to 10,000 notifications every month, for free.
Get started for free
© 2025 Courier. All rights reserved.