PromptHub: AI Prompt Manager

PromptHub is the ultimate offline-first productivity app and prompt engineering workspace designed for developers, creators, AI enthusiasts, and prompt engineers. Organize, refine, test, and manage your AI prompts for ChatGPT, Midjourney, Claude, Gemini, DALL-E, and Llama seamlessly in one clean workspace.
​Whether you are crafting complex system prompts, managing AI art parameters, or storing code generation templates, PromptHub keeps your workflow organized, accessible, and ultra-fast.
​Key Features:
​Offline-First and Local Storage
Work uninterrupted anywhere. Your entire prompt library is stored locally using Room database persistence, ensuring fast access even without an internet connection.
​Cloud Sync and Cloud Backup
Keep your prompts safe across multiple devices. Effortlessly sync your collection with secure Firebase Authentication and multi-account Google Sign-In support.
​Dynamic Variable Editor
Create reusable prompt templates using [VAR] placeholders. Easily fill variables on the fly to generate customized outputs for copywriting, image generation, and coding tasks.
​Smart Organization and Categories
Categorize prompts by tool (Midjourney, ChatGPT, Claude, DALL-E, Stable Diffusion) or target platform (App, Web, Video, Image, Marketing). Save favorites and filter your library instantly.
​Modern Material Design 3 UI
Built with a sleek, minimalist Material Design 3 interface featuring dynamic light and dark mode themes for an effortless experience.
​Built for Professionals and Creators
Perfect for developers building AI software, digital marketers writing ad copy, and prompt artists managing Midjourney parameters (--ar, --stylize, --v).
​How PromptHub Enhances Your AI Workflow:
​Store and Organize: Never lose a high-performing prompt or system instruction again.
​Template Builder: Turn repetitive text into dynamic prompt templates with variable fields.
​Multi-Model Support: Tailor prompts specifically for LLMs, image generators, and developer APIs.
​Fast Copy and Export: One-tap copy to instantly paste generated prompts into any AI tool.
​Upgrade your AI productivity today. Download PromptHub: AI Prompt Manager and master prompt engineering!