Application idling allows your applications gears to spin down when they are not getting any HTTP or WebSocket requests.
If you are a free user and your application doesn’t receive an external http/https or ws/wss request for 24 hours, then your application will enter an idled state. When an application is in this state, it is essentially paused. Once an application gets an external request, it will automatically return to a running state without the loss of any functionality.
No, we do not currently have a mechanism to send out notifications when your application is about to be idled.
There are two ways to keep your applications from idling:
Upgrade to a premium plan. Applications running on premium plans are idled after prolonged period of no requests flowing in.
Make a popular application that gets lots of traffic. Make sure that your application uses standard SEO practices and provides unique and useful content.