Google Drive is Google's file sync app that lets you store all of your files online alongside your Google Docs documents, and keep them synced with all of your devices.
Summarize rival facts from supplied pages and flag gaps.
Your research findings arrive in a source-linked table, with missing facts and unreadable pages clearly marked.
Capture revised rival page text for a dated comparison.
Your website version history keeps the full text when a watched section changes. You get a dated link for later review.