AI-powered developer toolkit with GPT-4 integration, code generation, and API testing in your pocket
Download GP-T Open HubChoose your starter package and accelerate your coding workflow
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GP-T Open Hub operates as a hybrid client-server architecture that routes API requests through multiple AI providers including OpenAI GPT-4, Claude, and Gemini. The app maintains a local SQLite database for conversation history and code snippets, enabling full offline access to previously generated content and saved API collections.
The code generation engine uses context-aware parsing to analyze your current project structure before suggesting implementations. When you request a function, the AI examines imported libraries, existing class definitions, and variable naming patterns to generate code that integrates seamlessly with your existing codebase rather than producing generic templates.
API testing functionality includes automatic header detection, environment variable management, and response validation against JSON schemas. The app stores request collections locally with encryption, allowing you to build comprehensive test suites that sync across sessions without requiring cloud storage.
Switch between GPT-4, GPT-3.5 Turbo, Claude 3, and Google Gemini within the same conversation thread. Each model excels at different tasks - use GPT-4 for complex architecture decisions, Claude for detailed code reviews, and Gemini for rapid prototyping. The app automatically formats responses based on detected programming language syntax.
The AI analyzes your clipboard content, recent conversations, and project context to generate code that matches your existing patterns. Request a React component and the app detects whether you use functional or class-based syntax, TypeScript or JavaScript, and applies your preferred styling approach automatically.
Build and execute REST, GraphQL, and WebSocket requests directly in the app. Save collections with environment variables, authentication tokens, and pre-request scripts. The response viewer includes JSON formatting, header inspection, and performance metrics tracking with millisecond precision.
All conversations, code snippets, and API collections are stored locally in encrypted SQLite databases. Search through your entire history using full-text search with regex support. Export conversations as Markdown, JSON, or plain text for documentation purposes.
Code blocks render with language-specific syntax highlighting for over 180 programming languages. The editor includes bracket matching, auto-indentation, and one-tap copying with automatic clipboard formatting that preserves indentation when pasting into your IDE.
Create reusable prompt templates with variable placeholders for repetitive tasks like writing unit tests, generating API documentation, or refactoring legacy code. Templates support conditional logic and can reference previous conversation context for multi-step workflows.
Developer: OpenHub Labs
Version: 2.1.0
Released: July 2026
Platform: Android native with Kotlin and Jetpack Compose
OpenHub Labs specializes in mobile-first developer tools that bridge cloud AI services with local-first data architecture. GP-T Open Hub represents their flagship product combining multi-provider AI access with professional-grade API testing capabilities in a single offline-capable application.
Free on Android 8.0 and above. No subscription required for basic features. Installs in under 60 seconds.
Download for AndroidRequires internet connection for AI queries. Offline mode available for saved conversations. Optional in-app purchases for premium AI models. Rated E for Everyone.