What is the Simple Photo Widget application, how does it work?

According to the introduction of Life Simple, Simple Photo Widget is a Productivity app on the Android platform. There is currently a 1.3 version released on Feb 11, 2020, you can see the details below.

Simple to use home screen widgets to display your favorite photos with three layout options and support multiple pages.

You can use photo widgets to:
Display your family photo collection in home screen
Access your Barcode quickly
Simply have fun

Features:
Display a single photo file or multiple photos from selected folder in home screen widgets
Supports Treemap, Uniform, and Hexagon layout for multiple photos
Supports manual or automatic paging and animated page transition