Can I use the Action Button?

Yes, on iPhone models that have one. It is the shortest path there is from a thought to it being written down.

1. Open Settings in Jot Minder and choose Action Button.
2. Pick what it should do: open the app, start recording, or start typing.
3. Pick which list it should go into.
4. In the iPhone's own Settings, assign the Action Button to the Jot Minder shortcut.