Installs are expensive, and whether an app survives depends on how many of those users come back. Push notifications and in-app messaging are the two channels you control directly, and used well they are among the most effective tools for app user retention.

Used badly, they drive people away. Each irrelevant notification gives a user a reason to turn notifications off, and each interruptive pop-up gives them a reason to uninstall. This guide covers how to use push notifications and in-app messages for retention in 2026, how to measure app open rate and impact correctly, what to look for in push notification tools that increase retention without increasing churn, and in-app messaging best practices that keep messages useful to the user.

Push notifications vs in-app messaging

Push notifications are delivered by the operating system, through Apple Push Notification service on iOS and Firebase Cloud Messaging on Android. They appear on the lock screen or in the notification centre when the app is closed, and their job is to bring the user back.

In-app messages appear while the user is inside the app, as banners, tooltips, modals, cards or an inbox. They help the user get value out of the session they are already in.

The two work best together, with push bringing people back and in-app messages guiding them once they arrive. A push that says "Your report is ready" should open the report, and an in-app tip on that screen can show how to share it with the team.

Permission comes first

You can only send push notifications to users who have allowed them. On iOS, apps must ask for permission, and Android 13 and later also requires a runtime permission for notifications. Users who refuse are hard to win back, so decide when and how to ask as carefully as you would any other product feature:

  • Skip the prompt on first launch. Ask when the value is obvious, for example after a user creates their first order or follows a topic.
  • Show a pre-permission screen in your own UI that explains what notifications the user will get and why, before triggering the system dialog.
  • Consider provisional notifications on iOS. They are delivered quietly to the notification centre, so users can judge them before deciding.
  • Offer preferences by category (orders, reminders, news, promotions), so users can turn the volume down without switching everything off.

Read the platform guidance on notifications before you design: Apple's Human Interface Guidelines on notifications and Android's notification runtime permission documentation.

How to use push notifications for retention

Notifications that improve retention are the ones users would be annoyed to miss. The common high-value types:

  • Transactional messages, such as order status, payment confirmations, booking reminders and security alerts.
  • Personal activity: a reply, a mention, a new match, a shared document.
  • Progress and habit messages, like a reminder at the time the user usually practises, a streak at risk, or a goal almost reached.
  • Re-engagement that carries real news for the user: new content in a category they follow, a price drop on a saved item, an unfinished task.

Generic broadcasts ("Check out what's new!") rarely help and often hurt. Trigger messages from user behaviour, personalise the content, respect time zones and quiet hours, and always deep link to the exact screen the message is about.

App open rate: what it is and how to measure it

App open rate for push notifications is the share of delivered notifications that lead to an app open. There are two common definitions:

  • Direct open rate counts users who tapped the notification itself.
  • Influenced open rate counts users who opened the app within a defined window after receiving the notification, even if they did not tap it.

Open rates vary widely by industry, platform, message type and audience, so treat benchmark figures from the internet with caution and compare yourself mainly with your own baseline. Open rate is also only a proxy. A notification can get plenty of opens and still hurt retention if it annoys people. Track it together with:

  • Conversion to the action the message was about.
  • Notification opt-out rate and the share of users with notifications enabled.
  • Uninstall rate after campaigns.
  • Day 1, day 7 and day 30 retention for exposed users versus a holdout group.

The holdout group matters most. Leave out a small random share of eligible users from a campaign, then compare their retention with the users who got it. That difference is the only way to know whether messaging changes behaviour or simply takes credit for opens that would have happened anyway.

How to use in-app messages for retention

In-app messages do the most good in the first sessions, when users decide whether the app is worth keeping. Good uses include:

  • Onboarding guidance: short hints in context that lead to the first moment of value, such as creating a first project or completing a profile.
  • Feature discovery, introducing a feature at the moment it becomes relevant instead of in a tour on first launch.
  • Help in empty and stuck states, when a user has not taken a key action after some time.
  • Announcements of important changes, with an inbox so users can read them later.
  • Feedback and rating prompts after a positive moment, using the platform's native review prompts where appropriate.

In-app messaging best practices

  1. Match the format to how important the message is. Use tooltips and inline cards for tips, banners for timely information, and full-screen modals only for rare, critical messages.
  2. Trigger messages on behaviour. Show them when the user reaches the relevant screen or action, and avoid firing them on app launch.
  3. Show one message at a time. A global limit per session stops campaigns from different teams from stacking up.
  4. Make messages easy to dismiss, and remember the dismissal. Users get frustrated fast when the same modal keeps coming back.
  5. Keep the copy short and specific, with one clear action.
  6. Support screen readers, dynamic text sizes and dark mode, and never trap focus.
  7. Test variations against a control, and stop messages that do not improve the target behaviour.

Which push notification tools increase retention without increasing churn?

A tool will not raise retention by itself. Pick the one that makes good practice easy and bad practice hard. Whether that is a customer engagement platform, your cloud provider's messaging service or an in-house system built on APNs and FCM, check it against these criteria:

  • Behavioural triggers and segmentation. Can it send messages based on real-time events in your app and on user attributes, in addition to scheduled blasts?
  • Frequency capping and quiet hours. Can you set global limits per user across all campaigns and channels, and respect local time zones?
  • Holdout groups and experimentation. Can you run A/B tests and measure incremental retention against a control, beyond opens and clicks?
  • Cross-channel orchestration. Can push, in-app, email and SMS share one user profile and one set of rules, so the same user does not get hit on every channel at once?
  • Preference management. Does it support notification categories and sync users' choices with your app?
  • Deep linking and rich content, with reliable links into specific screens on both iOS and Android.
  • Data and privacy: where data is stored, how consent is handled, data export and deletion, and compliance with the regulations that apply to your users.
  • SDK impact on app size, startup time and battery use, and how well the SDK is kept up with new OS releases.
  • Integration with your analytics, data warehouse and backend events.
  • The pricing model (monthly active users, messages sent or features) and how it scales as you grow.

For early-stage products, platform push services plus your own event triggers are often enough. Once there are more campaigns and more teams sending them, a dedicated engagement platform earns its cost mostly through frequency control, orchestration and experimentation.

Avoiding churn from over-messaging

Notification fatigue costs real users. The signs of over-messaging are rising opt-out rates, open rates falling across all campaigns, uninstall spikes after sends, and complaints in app store reviews. To prevent it:

  • Set a messaging budget per user per week, and make every team share it.
  • Give transactional and personal messages priority over promotional ones.
  • When users keep ignoring notifications, send them fewer, or stop.
  • Suppress messages about actions the user has already completed.
  • Review every recurring campaign quarterly and retire the ones that do not move retention against a holdout.

Building retention into the product

Messaging can only amplify the value the app already has. Retention is strongest when the app is fast and reliable, solves a real problem and has a clear first-run experience. Notifications and in-app messages then help users notice value they would otherwise miss. EmphaSoft builds mobile apps for startups, native and cross-platform with React Native and Flutter, and our UX design team helps plan onboarding, permission flows and messaging that users are glad to get.

FAQ

What is a good app open rate for push notifications?

It depends heavily on industry, platform and message type, so published averages are only a rough reference. Compare against your own baseline, and judge success by incremental retention against a holdout group instead of opens alone.

How many push notifications are too many?

There is no universal number. Watch opt-out, uninstall and engagement trends after sends. When they get worse, you are sending too much or the messages are not relevant enough. Global frequency caps help.

Are in-app messages better than push notifications for retention?

They do different jobs. Push brings users back when they are away, and in-app messages help them succeed while they are in the app. Most retention strategies need both, run under the same rules.

When should an app ask for notification permission?

After the user has seen enough value to understand why notifications are useful, ideally with a short explanation screen first. The very first launch is usually too early.

Improve your app's retention

If you want to plan a notification and in-app messaging strategy, or build the app features that support it, get in touch with EmphaSoft. We can help you work out which messages bring users back without wearing out their patience.