NexaSphere

Free guides / 5 PDFs, 47 pages in all

Free guides, written to be used.

Fact-checked guides and cheat sheets on AI search, ChatGPT, browsers, AI chat history and developer tools. Each one is useful on its own, not a product brochure. Enter your email on a guide’s page and the PDF is yours straight away.

The guides

  • The GEO Playbook

    How to get your content cited by ChatGPT, Perplexity and Google AI Overviews, built on the KDD 2024 research from Princeton and IIT Delhi.

    Guide13 pages, PDFFor bloggers, seo professionals and content teams

  • The ChatGPT Power User Guide

    Prompt frameworks, how context windows actually work, and workflows that hold up, checked against OpenAI documentation.

    Guide14 pages, PDFFor marketers, writers, developers and students

  • The Browser Productivity Stack

    A system for tab overload, Chrome shortcuts and extension audits, grounded in research from Carnegie Mellon and UC Irvine.

    Guide14 pages, PDFFor knowledge workers, researchers and developers

  • The AI Conversation Organization Cheat Sheet

    A five-folder system, a naming rule and a weekly five-minute pass that keep ChatGPT, Claude and Gemini chats findable.

    Cheat sheet3 pages, PDFFor anyone with hundreds of ai chats

  • The 2026 Developer Tool Stack

    One pick per category, from terminal to database GUI, with the honest reason why and the privacy-first picks flagged.

    Cheat sheet3 pages, PDFFor developers setting up a machine

01Also free

Two more ways to use them.

Check whether AI can read your site

The free crawler check reads your robots.txt and shows which of the crawlers behind ChatGPT, Claude, Perplexity and Gemini are allowed in. It pairs with the GEO Playbook.

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