--- title: "Spellbook: AI Prompt Manager — App Overview" url: https://marlvel.ai/apps/spellbook-ai-prompt-manager category: Productivity developer: Lukasz Solniczek platforms: ios rating: N/A (0 ratings) pricing: free report_level: overview generated: 2026-05-10 last_verified: "2026-05-10T02:49:31.122Z" --- > **Key Insight:** Spellbook functions as a centralized development environment for engineering, testing, and organizing LLM prompts. | Metric | Value | |--------|-------| | Category | Productivity | | Rating | N/A ★ (0) | | Pricing | free | | Platforms | iOS | | Latest Version (iOS) | 1.3 | | Developer | Lukasz Solniczek | ## What is Spellbook: AI Prompt Manager? Spellbook is a prompt management workspace designed to help users treat natural language prompts like code through versioning and testing. It enables users to run prompts against over 100 LLMs via OpenRouter to compare outputs and optimize performance. ## Key Features - **Battle-Test Your Prompts**: Allows users to run prompts against 100+ models via OpenRouter API to compare outputs side-by-side. - **Organize with Precision**: Provides a searchable library system using tags, folders, and smart filters to manage prompt collections. - **Dynamic Variables**: Enables the creation of reusable prompt templates using smart placeholders. ## Who is it for? Developers, content creators, and AI enthusiasts managing complex LLM workflows. ## Links - [App Store](https://apps.apple.com/us/app/spellbook-ai-prompt-manager/id6754807742?uo=4) - [Full Intelligence Report](https://marlvel.ai/apps/spellbook-ai-prompt-manager) --- *This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/spellbook-ai-prompt-manager).* *Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*