It looks like you are referring to RedNotebook Portable, a popular, free journaling software designed to run completely off a USB drive or cloud folder. Because it is “portable,” it does not leave any data or registry entries on the host computer, making it ideal for moving between different PCs. Core Features
Calendar Navigation: Your journal entries are tied directly to an interactive calendar view for easy day-by-day browsing.
Rich Text Support: You can format your entries using bold, italics, underlines, bullet lists, and customizable titles.
Media Insertion: It allows you to insert links, files, images, dates, and times directly into your writing.
Search & Word Clouds: You can assign customizable tags to entries. The app automatically builds searchable word clouds of your most frequently used words and hashtags to help you find past notes quickly.
Flexible Exporting: Completed journals can be exported into multiple formats, including plain text, HTML, LaTeX, or PDF. Privacy and Future-Proofing
Local Security: It features automatic saving and allows you to back up your entire journal into a standard .zip folder.
Plain Text Format: All of your writing is stored locally in plain text files. This ensures you completely own your data and will always be able to open your entries, even if you stop using the software.
You can download it for free via the official PortableApps RedNotebook Portable page.
Note: If you were instead referring to a mobile app version of a business directory, medical reference, or social media platform—such as the American Academy of Pediatrics’ Red Book medical app, the Manager’s Red Book shift log, or the Chinese social commerce platform Xiaohongshu (Little Red Book)—please let me know so I can give you the right information!
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