I think I read somewhere that I could add a button or something on my iphone homescreen, and would like to use something like that to add jumping jacks throughout the day to my goal.
but i completely forgot where i read this and now i can’t figure out how to do it.
Did I imagine it? Or anyone any idea how to do this?
Yes, you can do that!
I recorded a quick video to show how. Hopefully it helps. Let me know if you have any questions! And there may be an even easier way that I don’t know about. 
thank you!!
You’re welcome!
And I kept poking around and realized there’s a way to add shortcuts that look like app buttons (i.e., more compact), as well!
If you’re in the Shortcut definition, and you click the little (i) icon at the bottom:
There’s an option to “Add to Home Screen”:
If you tap that, then you can choose an icon and color, and add it to the home screen:
Then you’ll have an app-sized icon that will run the shortcut!
I’m using this to add data to my workout goals and various books I’m reading. Handy!
