Prompt
What notification API should I use for app alerts?
Latest observation
Oct 13, 2026
OpenAI APIWeb search: off
For app alerts, the best “notification API” depends on what kind of alerts you mean:
1) In-app alerts / banners / toasts
Use your app framework’s UI notification system:
- React:
react-toastify,notistack, or your design system’s alert component - Flutter:
SnackBar,Dialog, or custom overlay widgets - iOS:
UIAlertController - Android:
Snackbar,Toast, or material dialogs
2) Push notifications to devices
Use a push notification service:
- Firebase Cloud Messaging (FCM) — common choice for Android, iOS, and web
- Apple Push Notification service (APNs) — for iOS/macOS directly
- OneSignal — simpler abstraction over push notifications, good for fast setup
- Expo Notifications — if you’re using Expo for React Native
3) Email/SMS alerts
Use a messaging API:
- SendGrid / Mailgun / Postmark for email
- Twilio for SMS/WhatsApp/voice
Recommendation
If you want general app alerts across mobile/web, start with:
- FCM if you want a direct, flexible, widely used solution
- OneSignal if you want the easiest setup and dashboard
- APNs only if you’re iOS-only and want direct control
If you tell me your stack (web, iOS, Android, React Native, Flutter, etc.) and whether you mean in-app or push notifications, I can recommend the best specific API.