If you're looking for a free, easy-to-use app that teaches you Python programming and data science, look no further than Learn Python with Data Science by Sky Apper. This app is suitable for both experienced programmers and beginners with no programming knowledge.

The app features a great user interface and all topics are available offline. Topics are organized in a logical way, making them easy to understand. The app also provides practice programs, a copy and share feature, and step-by-step learning. It even includes Python interview questions and answers to help you prepare for your next job interview.

The app covers a wide range of topics, including Python basics, data science, big data analytics, and more. The Python tutorial covers basic syntax, variable types, decision making, loops, and numbers. The data science tutorial covers Pandas, Numpy, Scipy, Matplotlib, data cleansing, and JSON data processing. The big data analytics tutorial covers data life cycle, methodology, core deliverables, data exploration, data visualization, and an introduction to R.

Overall, Learn Python with Data Science is an excellent tool for anyone looking to learn Python programming and data science. It is easy to use, comprehensive, and available for free.