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.
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