Azure

Azure Notification Hubs: One Push, a Million Phones

Why looping over device tokens yourself is the answer that fails the interview.

What you'll learn

  • Why a loop over a million device tokens finishes too late
  • How one send becomes APNs, FCM and WNS payloads
  • How tag targeting replaces holding device tokens yourself
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Understand it one step at a time

The short runs these in order in about 32 seconds. Here they are written out — pick any step to jump the short straight to it.

1 Step 1 of 10

Send this to a million phones

One line of marketing copy, one send button, and 1,000,000 registered devices across three platforms that all need to hear about it.

Frequently asked questions

Why not just loop over device tokens and call each push service yourself?
A million individual calls to APNs, FCM and WNS takes too long to still be relevant by the time it finishes, and it means your code has to know the payload format each platform expects. Notification Hubs takes one send and fans it out as the correct payload per platform.
How do you target an audience without storing device tokens yourself?
Tag targeting — you describe the audience (for example, premium users in a region) and Notification Hubs resolves which registered devices match, so your application code never has to hold or manage device tokens directly.

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These are built for a phone

Every short is drawn at full portrait height, the shape a phone already is. Installed, it opens full-bleed with no address bar across the top — and the whole library reads offline.

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