What are some alternatives?
When comparing Code4Startup and Code-Free Startup, you can also consider the following products
Quick Code - Curated list of free online programming courses
Google App Maker - Low-code application development for G Suite
Udemy - Online Courses - Learn Anything, On Your Schedule
Airtable Blocks - Modular apps that enable anyone to build complex software
Codeplace - Learn how to code by building real web apps
100 Days of Swift - Learn Swift by building cool projects