You are waiting on an important email. You wait and wait and wait. You never hear or see a notification on your device. You frustratingly head to your browser and log into your email account to find that important email landed in your mailbox 25 minutes ago. Delayed notifications can be quite annoying. Delayed Notifications happen when your carrier or router cuts out your connection due to inactivity. When this happens your notifications won't push through until a "heartbeat" occurs. The mobile heartbeat interval happens at 15 minutes over wifi and 27 minutes over mobile data by default. With the Push Notification App you can change the heartbeat interval so your notifications are pushed through instantly no matter what. Head to the link below for the download. It should also be noted that this does require root.
via Play Store