LogicSage

LogicSage is an open-source SwiftUI app paired with a Swift Vapor server for chatting with GPT models and using AI to help you build software. It’s designed for developers who want a clean, customizable chat experience on iPhone, iPad, and Mac—while keeping conversations organized and accessible. Chats are saved to disk so you can return to previous discussions, continue longer problem-solving sessions, and keep a personal history of prompts and outputs.

The app focuses on practical workflows for coding and project creation. You can switch GPT models in the middle of a conversation, use built-in system prompts or create your own to steer responses, and even have the app speak AI replies aloud when you want hands-free review. Conversations can be named for better organization, and the interface supports personalization such as adjustable colors and text size. Haptic feedback adds a more responsive feel while you interact.

On the Mac, LogicSage can use GPT to generate Xcode projects, helping you go from an idea to a structured project faster. For developers working with existing code, it also supports downloading Git repositories, viewing code with color customization, and contributing back by pushing pull requests—making it useful not only for learning and prototyping, but also for real project collaboration.

LogicSage is available on the App Store for iPhone and iPad, and its source is open for anyone who wants to inspect, modify, or self-host parts of the stack.