Little programs or scripts or automations you’ve created ad-hoc to solve a particular single use case
I have lots of shortcuts i make on my phone and I have one i love that detects when bluetooth accidentally or purposefully disconnects from my speaker and reconnects it and fixes a playback glitch so its back to playing properly
I built a Tasker program that blocks unknown numbers if toggled and allows back-to-back calls through. It uses a Minimalistic Text widget for control.
I also built one for background images. Every time I turn my screen off, my background changes to a new (blurry, gray) picture of my wife. Double tapping will unblur and color it. I can toggle switching if I like a particular picture.