Spellbook: AI Prompt Manager

Take your prompt engineering workflow to the next level. Spellbook is a professional prompt manager for developers, creators, marketers, and AI power users who want to organize, test, refine, and reuse their best prompts in one focused workspace. Stop losing important prompts in Apple Notes, Slack, chat history, or random documents. Build a searchable prompt library designed for real LLM workflows. WHY SPELLBOOK? Writing prompts is easy. Managing them at scale is not. Spellbook helps you treat prompts like reusable assets: organize them, version them, add variables, test them across models, and keep improving what works. CORE FEATURES Test Prompts Across Models Connect your OpenRouter API key and run prompts against a wide range of leading LLMs. Compare outputs side by side and find the best model for each task, use case, or workflow. Build Your Prompt Library Save your best prompts in a clean, searchable library. Use folders, tags, and filters to quickly find the right prompt when you need it. Reusable Prompt Templates Create dynamic templates with variables like #{topic}#, #{tone}#, #{audience}#, or #{language}#. Fill them in when you run the prompt without rewriting the original. Version and Refine Track changes as your prompts evolve. Keep the versions that perform well, revisit earlier drafts, and improve your prompts over time. Organize Complex LLM Workflows Manage prompts for writing, coding, marketing, research, product work, automation, and AI app development from one dedicated workspace. PERFECT FOR • Prompt Engineers building and testing advanced prompt systems • Developers working on AI apps, agents, wrappers, and automation • Marketers and writers who need consistent AI-generated output • Creators who reuse prompts across projects and clients • AI enthusiasts who want a better way to manage their prompt collection Spellbook gives your prompts a permanent home. Download Spellbook and start building your professional prompt library today. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/