Kojiro Tsugaru

iOS app to encourage people to prevent being late for appointments with friends

Transform your time management with Puctee, the social-accountability iOS app that helps you prevent being late for appointments with friends. Create events with predefined penalties that activate when someone runs late—harnessing peer pressure and behavioral economics to dramatically improve punctuality. Set up group events, invite friends, and watch as the fear of consequences (whether it's buying coffee or doing push-ups) motivates everyone to arrive on time. Real-time push notifications keep everyone informed, while the clean, intuitive interface makes coordination effortless. With its science-backed approach to accountability, Puctee transforms punctuality from a personal struggle into a shared commitment, making every appointment count.

AI-powered iOS app to generate reply suggestion from just a screenshot of a chat

Flair AI revolutionizes messaging by providing intelligent reply suggestions through screenshot analysis. The app uses OpenAI's GPT models to understand chat context and generate relevant responses. Built with SwiftUI for a seamless iOS experience, it features a custom FastAPI backend deployed on Railway that securely handles API credentials and enables dynamic prompt engineering. The architecture allows for rapid iteration of AI behavior without requiring app updates.

Flutter-based anonynmous social app for closed school community

This project showcases the power of Flutter for building cross-platform apps with a modern, intuitive interface. It features a custom backend deployed on Firebase that securely handles user authentication and data storage. The app also includes push notifications to keep users engaged and informed about new content.