A Pythonista utility (meant to be put in the action menu) that allows you to add a home screen icon for any script
Installation script:
import zipfile, requests, io
c = requests.request('GET', 'https://github.com/0942v8653/pythonista-homescreen-icon/archive/master.zip').content
with io.BytesIO() as b:
b.write(c)
with zipfile.ZipFile(b) as z:
z.extractall()
Once it's installed, add the chooseicon.py file to the action menu. and give it a nice name.
Currently only tested on iPhone 5s, but it may work on iPhone 4/4s/6.