Love them or loathe them, push notifications on smartphones are a thing. Developers use them to increase user engagement with their apps. By sending the user a notification, you can alert them to a breaking news story, or send them a coupon and get them to buy something. That said, there’s a fundamental problem with how push notifications work on mobile. There are two popular mobile messaging APIs. On iOS, most developers tend to use Apple Push Notification Service (APNs). For Android specialists, the API of choice is Google’s Firebase Cloud Messaging (FCM). Neither of these APIs provide delivery guarantees,…

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