Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.
The 2 images that I provide (no_image.png and no_image_alt.png) are 190x136 & 140x100 respectfully and they look and work fine in the same places that a category image would be displayed. Anything less and you will start looking fuzzy when its resized larger than what was uploaded.
Did that work for you? If not, make them a bit bigger so that when thumbs are generated, they are crisp.