Ntfy
ntfy, pronounced as 'notify', is a simple, HTTP-based pub-sub notification service that allows you to send push notifications to your phone or desktop from any computer. It operates via scripts using simple HTTP PUT or POST requests. This makes it a handy tool for notifying yourself when scripts fail or when long-running commands complete. To use ntfy, you simply need to install the app on your phone, subscribe to a topic of your choice, and start sending messages to your topic. The app is available on Google Play, F-Droid, and the App Store. ntfy is open-source and free to use, but also offers paid plans for those who wish to support its development.