XlSx Viewer is a free Android app developed by Star Technology that allows you to open and manage XLS, CSV, XLSX, and XLSM files from various sources such as file manager, email, and web. It is a powerful spreadsheet tool that can be used to view, edit, and create spreadsheets on your mobile device.

This app is perfect for those who are always on the go and need to access their data files and spreadsheets from anywhere. With XlSx Viewer, you can easily open and manage your spreadsheets without an internet connection. It offers a wide range of features, including landscape/vertical view options, zoom in/out, and robust formatting tools.

One of the best features of XlSx Viewer is its flexibility. It allows you to create charts and spreadsheets that meet your specific needs. You can also open data analysis files directly from other applications. It supports various file formats, including DOCS, PDF, Docx, PPT, and TXT, making it a versatile tool for all your document needs.