Push notifications are a great way for app developers to keep users engaged with their products. They offer flexibility in managing notifications beyond just turning them on or off, and can significantly increase click-through rates compared to email blasts. However, it's crucial that users have options to manage notifications effectively, such as choosing when and how they receive alerts. There are many push notification services available, each with its own strengths and weaknesses. Airship is an all-in-one tool offering customer engagement, lifecycle marketing, and data solutions, while Expo is a framework for React Native-based applications. Firebase Cloud Messaging (FCM) is another widely used service that integrates well with Google marketing platforms. OneSignal offers robust analytics tools and unlimited API calls, making it suitable for small startups and enterprises alike. Beams from MessageBird provides a variety of SDKs for developing iOS, Android, or web applications, while APNs is Apple's walled-garden solution for iOS push notifications. Courier is a notification platform that integrates with over 50 different providers, allowing teams to easily manage changing needs and budgets. By choosing the right service, developers can ensure their users receive effective push notifications that enhance their overall experience.