Social Hangout Coordination App
Calido
Calido helps you coordinate hangouts in as easy as a few quick steps. Send a spontaneous hang invite, plan a future meetup, find the optimal time, send reminders. Invite anyone in-app or via text with a shareable invite link. Calido helps you plan so you can spend more time together.
What is Calido?
Calido helps you spend more time with the people who matter. Whether it’s a last-minute coffee catch-up or a long-overdue dinner with friends, Calido makes planning effortless. Invite friends via text or in-app, suggest hangout ideas, vote on the best time, and get smart reminders — all from one place.
Services Provided:
Objectives
- ◇Created chatbot that help host and participant to plan hangouts.
- ◇Build a real-time system for scheduling and coordinating social meetups.
- ◇Enable frictionless sharing and invitations across contacts and platforms.
- ◇Reduce the planning burden and maximize face-to-face interactions among friends.
Approach
Our approach with Calido focused on making real-world hangouts effortless. We combined real-time tech with intuitive UI to allow users to suggest, vote, and finalize hangout plans within seconds. The backend, built with FastAPI, ensures responsiveness and security, while the React frontend delivers a seamless mobile experience for scheduling, reminders, and sharing.
Chatbot Development (Twilio + OpenAI)
Built a smart conversational assistant to help users coordinate hangouts via SMS using Twilio and OpenAI’s Chat Completion API.
- ◇Used Twilio SMS to receive and send user prompts and links.
- ◇Integrated OpenAI's Chat Completion API to generate context-aware responses, suggest hangout times, and handle RSVP flows.
Backend Development (Node.js + Express)
Developed a scalable and event-driven backend using Node.js and Express, hosted on AWS for high availability and performance.
- ◇Built APIs to manage invites, time slots, calendar sync, and shareable links.
- ◇Handled session context, user preferences, and message logging.
- ◇Deployed server on AWS with secure API gateway and autoscaling.
Frontend Development (React Native)
Created a seamless user experience using React Native for the mobile app.
- ◇Built real-time UI for suggesting times, voting, and reminders.
- ◇Used shared components for consistency and faster iteration.
- ◇Optimized for mobile-first experiences and responsive interactions.
Feature Finalization & Quality Assurance
Ensured a frictionless experience through testing, iteration, and feedback integration.
- ◇Tested user flows for sending invites, confirming times, and reminders.
- ◇Validated multi-device performance and SMS-based coordination features.
- ◇Conducted real-user testing to refine calendar syncing and link sharing.
Results
successful SMS-based RSVP rate
hangouts coordinated in first 60 days
reduction in group planning time
Conclusion
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