Habit Pulse

Timeline: 2 Months — Solo

Habit Pulse is a full-stack SaaS habit-tracking platform. Instead of a bare-bones tracker, it's built as a production-ready product — with secure login, real-time reminders, analytics, and paid subscriptions — so users can actually stick with habits and pay for the pro tier.

How it works

1. OTP login — Users sign in with Firebase-powered OTP auth instead of passwords, with automatic session management and an onboarding flow optimized for mobile.

2. Habit tracking — Users create, update, and track habits daily, weekly, or monthly, with visual analytics showing streaks and completion rates over time.

3. Reminders — Firebase Cloud Messaging sends real-time push reminders on a per-habit custom schedule, with retry queues and fallback handling so notifications actually land.

4. Subscriptions — Razorpay handles recurring billing: plan activation, renewals, and webhook-driven state updates, so subscription status stays accurate without manual checks.

Highlights

• Built a full-stack SaaS platform with OTP auth, habit tracking, and analytics dashboards.
• Implemented real-time push notifications via Firebase Cloud Messaging with retry handling for reliable delivery.
• Integrated Razorpay recurring subscriptions with webhook-based billing state management.
• Optimized MongoDB with compound indexes, improving query performance by ~50%.

Why it's interesting

The hard part wasn't the habit-tracking CRUD — it was making the SaaS layer reliable: notifications that actually deliver, subscriptions that stay in sync with billing events, and a database that stays fast as data grows. Habit Pulse ties all three together into one working product.

Stack

Next.js · Node.js · TypeScript · MongoDB · Tailwind CSS · Firebase · Razorpay

Links

• Live Demo
• GitHub