Unfortunately, no push notification service can guarantee immediate delivery due to the fact there are networking and device-specific factors out of our control, such as:
- Power-saving modes
- Chinese power-saving restrictions
- Firewall blocking the connection to our servers
- The user may have uninstalled your app
- The user enabled battery-saver mode
- The device is low on battery or powered off
- The device may be disconnected from the Internet
- The device is connected to a network with a restrictive firewall
- The user may have Force Closed your app in the Android Settings
Nevertheless, you will definitely witness increased notification speed and reliability with Pushy. Most of our clients witness an incredible 98% and higher immediate delivery rate, in comparison to 79% with FCM, however, we can never guarantee a 100% delivery rate due to factors mentioned above.