Excel Function Reference Guide by POLAR LAB is a free Android app that serves as a quick reference guide for Excel users. It is a comprehensive guide that covers all the functions available in Excel and explains their usage in detail. The app is designed to work offline, so you can access the information anytime, anywhere without an internet connection.

The app has a simple and user-friendly interface, making it easy to navigate and find the function you are looking for. The guide provides a detailed explanation of each function, including its syntax, arguments, and examples of how to use it. The app also allows you to bookmark your favorite functions for quick access.

Overall, Excel Function Reference Guide is a valuable tool for Excel users, whether you are a beginner or an advanced user. It is an excellent reference guide that you can use to enhance your knowledge of Excel functions and increase your productivity.