What is Push Notifications?
Push notifications are short messages an app sends directly to a user's device, even when the app is closed. They re-engage users with timely, relevant prompts - reminders, updates or offers - and when used well they lift retention without becoming a nuisance.
How do push notifications work?
A push notification is a message delivered to a device from a server, appearing even when the app is not open. The flow is straightforward: when a user grants permission, the app registers with a platform push service - Apple Push Notification service for iOS, Firebase Cloud Messaging for Android - and receives a unique device token. The app's backend stores that token and, when it has something to say, sends the message to the platform service, which delivers it to the device. The user taps it and is taken back into the app.
Permission is the gatekeeper. On most platforms a user must explicitly opt in, so the value of notifications depends heavily on earning that permission and then respecting it.
Why push notifications matter
Most apps lose the majority of their users in the first weeks after install. Push notifications matter because they are one of the few channels that can bring a lapsed user back without paid advertising - a timely reminder, a relevant update or a personalised prompt at the right moment. Used well, they meaningfully lift retention and engagement. Used carelessly, they become noise, drive opt-outs and even uninstalls, so the channel rewards restraint and relevance.
What types of push notifications are there?
Common categories include:
- Transactional - order confirmations, delivery updates, security alerts.
- Reminders - prompts to complete an action or return to a habit.
- Personalised - messages tailored to behaviour or preferences.
- Promotional - offers and announcements, used sparingly.
- Re-engagement - nudges aimed at users who have drifted away.
Push notification best practices
Ask for permission at the right moment - after the user has seen value, not the instant they open the app. Make every message relevant and timely, and personalise based on behaviour rather than blasting everyone the same content. Respect frequency, because over-messaging is the fastest route to opt-outs and uninstalls. Segment your audience so different groups receive different messages rather than one broadcast to everyone, and consider the time zone and the moment - a useful prompt at the wrong hour still annoys. Always give users clear control over what they receive, and measure opt-out and conversion rates so the strategy stays grounded in evidence rather than guesswork.
How PixelForce approaches push notifications
At PixelForce, push notifications are designed in Phase 1 - Scoping and Design and refined in Phase 3 - Post Launch Support, where our in-house Adelaide team measures how messages affect real retention rather than assuming they help. We treat notifications as part of the engagement and retention strategy, instrumenting them so their impact feeds into our app data analytics work. The honest principle applies: if a notification does not earn its place by improving behaviour, we recommend cutting it, because over-notifying costs more users than it keeps. Across 100+ products shipped, restraint and relevance consistently outperform volume.
Where this applies
The PixelForce services where Push Notifications matters most - explore how we put it to work in client products.
Frequently asked questions
Push notifications are delivered to the device and appear even when the app is closed, making them a tool to bring users back. In-app messages appear only while the user is already inside the app, used to guide, inform or promote during a session. Push pulls users in; in-app messaging shapes the experience once they are there. Many products use both together as part of a wider engagement strategy.
On most platforms, yes - particularly iOS, where the user must explicitly grant permission before any notification can be sent. Android has historically been more permissive but now also prompts for permission on newer versions. Because permission is the gatekeeper, the timing and framing of the opt-in request matter enormously. Asking after the user has experienced value, rather than on first launch, typically earns far higher opt-in rates.
Yes, if misused. Too many notifications, or messages that feel irrelevant or promotional, frustrate users and drive them to disable notifications or uninstall the app entirely. The channel rewards restraint and relevance. The safest approach is to send fewer, more useful and well-timed messages, give users control over what they receive, and measure opt-out rates so a damaging strategy is caught and corrected early.
Look beyond delivery counts. The meaningful metrics are opt-in rate, the click or open rate of notifications, the conversion they drive once a user returns, and crucially the opt-out and uninstall rates that reveal whether messaging is wearing thin. The real test is impact on retention - whether notified users come back and stay more than those who are not. Measuring these together keeps the strategy honest.
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