Accelerating the Future
Through Productivity
We build apps that revolutionize everyday productivity with AI and mobile technology.
A global app studio loved by users in 60+ countries.
Our Products
Productivity apps built with AI and mobile technology. Used in 60+ countries worldwide.
AIBookCraft
AI Storybook Creator
Create your own children's storybooks with AI. Auto-generate text and illustrations, then export to PDF.
HabitStamp
Habit Tracker
Track habits with stamps and visualize your growth. A simple and fun habit-building companion.
Freelytic
Freelancer Analytics
APT Game
Party Games
EveryTracker
Universal Tracker
Global Impact
Users around the world are building more productive lives with Second Earth apps
Countries
Total Downloads
App Store Rating
Apps Launched
Hi, I'm
Sunwoo Kim
I'm a mobile engineer running Second Earth as a solo founder. With the mission of "Accelerating the future through productivity," I build apps that make people's daily lives more productive using AI and mobile technology.
🎯 Mission
Accelerating the future through productivity. Building easy-to-use tools powered by AI to help people focus on what matters most.
💡 Philosophy
Data-driven decisions, rapid experimentation, user-centric development. Execution over perfection, simplicity over complexity.
🛠️ Tech Stack
Our Strengths
Building user-centric products with deep expertise in AI and mobile technology
AI-First Development
Leveraging cutting-edge AI (Gemini, GPT) to deliver magical experiences to users.
Rapid Execution
From idea to launch, fast. Validating hypotheses with pretotyping and improving with data.
Global First
Targeting global markets from day one with multi-language support and localization.
Privacy Focused
Minimal data collection with transparent privacy policies that respect users.
Cross Platform
Native-quality apps supporting both iOS and Android with React Native.
Data Driven
Analyzing user behavior with Mixpanel and RevenueCat for continuous improvement.
Built with modern technology stack
2024
Founded
100%
Bootstrapped
$6K+
Monthly Recurring Revenue