The Courier Blog

How to migrate AppDelegate to UISceneDelegate (iOS 26 Requirement)

Apple is enforcing the UIScene lifecycle in iOS 27 — and it directly affects push notifications. In iOS 26, simulators began warning about missing scene support. Here’s what’s changing, what errors to expect, and how to update your app to keep push notifications working.

How to Add Toast Notifications with the New Courier Toasts SDK

Learn how to add real-time, customizable toast notifications to your app with the Courier Toasts SDK. This quick tutorial shows how to integrate toasts using Web Components or React and sync them with your notification center for a seamless, modern UX.

How to Build a Notification Center for Web & Mobile Apps

Building a notification center from scratch takes 3-6 months. This comprehensive guide shows developers how to implement a production-ready notification center with multi-channel support in days using React, React Native, iOS, Android, Flutter, or JavaScript. Learn how to add in-app notifications, toast alerts, push notifications, email, and SMS with automatic cross-channel state synchronization. Compare building custom vs. using platforms like Courier, Novu, and OneSignal. Includes real code examples and best practices.

Announcing Toasts for In-App Product Notifications

Courier Toasts has been completely rebuilt for Web Components and React. Ship polished toast experiences without building notification infrastructure yourself. Deliver real-time, customizable in-app notifications powered by a single message feed.

Toast Messages: When to Use Them vs. Snackbars, Banners, and Push Notifications

Toast messages are fast and lightweight—but when should you use a snackbar, banner, or push notification instead? Learn how to choose the right messaging pattern for a smoother, smarter notification experience.

What is the Twilio Messaging API?

Twilio's Messaging API enables developers to send and receive SMS, MMS, WhatsApp, and RCS messages at scale across 180+ countries. While Twilio excels at reliable message delivery through carrier networks, modern applications need more than single-channel messaging. Courier acts as a provider-agnostic orchestration layer that activates messaging across Twilio and other channels from a single platform. You get intelligent routing, user preference management, and fallback logic without vendor lock-in.

Top 20 Notification Examples That Actually Drive Engagement

Explore 20 stellar notification examples from industry leaders like Rippling, Slack, FedEx, Crocs, Miro, Trustpilot, OpenTable, and BambooHR that actually drive engagement. From payday celebrations to healthcare reminders, these patterns showcase what makes notifications effective across email, SMS, push, and in-app channels. Courier's enterprise platform enables intelligent routing, multi-channel orchestration, and universal inbox integration to implement these proven patterns at scale.

Top 10 Rules for SMS Messaging

SMS transactional messages have exceptional open rates but just 160 characters to communicate critical information. Whether it's delivery confirmations, security alerts, or payment notifications, these messages must be clear, trustworthy, and actionable. This guide covers 10 essential rules for effective SMS messaging: leading with purpose, ensuring brand clarity, respecting character limits, making actions crystal clear, building trust through proper link hygiene, sharing just enough context, guiding users through security scenarios, mastering timing, providing escape routes, and building unbreakable templates.

What Most People Get Wrong About Push Notification Metrics

Push notification analytics have evolved beyond traditional engagement metrics, yet many teams still rely on outdated measurement approaches that obscure real business value. The challenge lies in applying email marketing metrics to push notifications without considering fundamental differences in user behavior and platform constraints. A notification that never gets "opened" might still drive a purchase decision or prevent user churn.