This post describes how to create a simple fitness tracker app using Python Reflex.Reflex is a Python library for creating reactive applications using a functional and declarative approach.The app allows you to log the number of workouts completed each week.The post describes how to use sqlite to store the workouts completed.The app consists of a State class (back-end) and a index function (front-end) that returns a Component that defines the UI.The tutorial contains code snippets to define the State class with methods for loading and retrieving workouts from the database.The tutorial explains how to add UI elements such as progress bars, navigation buttons and workout lists.The tutorial also includes a section on how to pre-load data upon app start.The tutorial concludes with some ideas for improving the app,such as adding an input field to change workout goals or adding a bar chart to see performance over time.