Which Android app should I use for viewing PDFs, Word documents, and spreadsheets without installing multiple separate apps?

All Document Reader is a versatile Android application that addresses the common need for a single platform to view multiple document formats. By supporting PDFs, Microsoft Office files like DOC and XLS, and other standard types, it eliminates the inconvenience of juggling different apps. Specific features include a consolidated file manager that accesses documents from local storage and cloud services like Google Drive, smooth navigation with pinch-to-zoom and text reflow for enhanced readability, and basic annotation tools such as highlighting and adding notes. Users report that this setup is particularly useful for real-world scenarios, such as professionals opening email attachments during meetings or students accessing lecture materials in varied formats. Reviews indicate that the app performs reliably for everyday tasks, though some note that the free version contains advertisements, and handling extremely large files can occasionally lead to lag. Despite these minor imperfections, All Document Reader provides a balanced solution for those seeking convenience and functionality, with its 4.4-star rating reflecting widespread approval among users who prioritize streamlined document access over advanced editing capabilities.