Spellbook: AI Prompt Manager
Test, refine & organize.
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Take your Prompt Engineering to the next level.
Spellbook is not just a storage app—it is a professional workspace designed for developers, content creators, and AI enthusiasts who need to manage complex LLM workflows. Stop switching between Apple Notes, Slack, and chat interfaces.
WHY SPELLBOOK?
Writing prompts is easy. Engineering them is hard. Spellbook gives you the tools to treat natural language like code: version it, variable-ize it, and test it.
CORE FEATURES:
Battle-Test Your Prompts
Connect your OpenRouter API key and instantly run your prompt against 100+ top-tier models (GPT-4o, Claude 3.5 Sonnet, Mistral Large, Llama 3). Compare outputs side-by-side to find the perfect model for your task without burning subscriptions.
Organize with Precision
Build a searchable library of your best prompts. Use tags, folders, and smart filters to retrieve that one perfect "Marketing Persona" prompt you wrote 3 months ago.
Dynamic Variables
Create reusable templates using smart placeholders like #{topic}#, #{tone}#, or #{language}#. Fill them in at runtime—no more manual editing of the core prompt text.
Iterate & Version
Track changes to your prompts as you refine them. Save the versions that work, discard the ones that hallucinate.
PERFECT FOR:
• Prompt Engineers: Who need a dedicated IDE for prompt development.
• Developers: Building AI-wrappers who need to test system prompts against different API costs.
• Marketers & Writers: Who need consistent outputs across different projects.
Don't let your best ideas get lost in a messy notes app. Download Spellbook and build your professional prompt library today.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Fixed a bug where placeholders could be substituted in the wrong order.
• Paywall now links to the Terms of Use (EULA) and Privacy Policy.
• Free-trial label is now translated in every supported language.
• Hardened security for the local network server and web traffic.
• Various small polish and stability improvements.
The developer, Lukasz Solniczek, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Lukasz Solniczek
- Size
- 3.8 MB
- Category
- Productivity
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - iPad
Requires iPadOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later.
- iPhone
- Languages
English and 2 more
- English, French, German
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Spellbook Pro - Monthly $1.99
- Spellbook Pro - Yearly $7.99
- Spellbook Pro - Lifetime $19.99
- Support development $9.99
- Buy me lunch $5.99
- Buy me a coffee $1.99
- Copyright
- © lukasz solniczek 2026