Financial Future Created Together
Real-time co-management & AI-driven expense analysis for couples and spouses.
Beautiful & Powerful Dashboard
You & I Household Ledger removes complexity to focus on the essential financial tracking features.
Everything You Need for Shared Finances
Replace complex paper logs with the smartest and most intuitive financial tool for couples.
Real-time Co-management
Synchronize in real time with your partner to manage expenses transparently and in perfect balance.
AI Expense Analysis
Our AI assistant analyzes monthly spending patterns to deliver custom saving tips and feedback.
Intuitive Financial Stats
Skip complex logbooks. Grasp cash flow at a glance with sleek charts and trend graphs.
iOS & Android Cross-Platform
Seamlessly record transactions on modern web browsers or dedicated iOS and Android native applications with real-time sync.
3-Sec Social Sign-in & Guest Mode
Get started in 3 seconds with Kakao, Google, or Apple, or explore all features immediately without registration in Guest Mode.
Robust Data Privacy & Isolation
Supabase Row Level Security (RLS) and strict cryptographic isolation ensure that only you and your partner can access your ledger.
Engineering Insights & Tech Stories
Real-world architectural decisions and problem-solving logs behind You & I Household Ledger.
Demystifying MCP (Model Context Protocol): Giving Hands and Feet to AI Agents
How the open-standard Model Context Protocol connects LLMs to databases, GitHub, and local tools. A developer walkthrough of the Host-Client-Server model, Tools vs Resources, and comparisons with RAG.
Read More →Revisiting OOP in Practice: Why Composition Beats Inheritance
Looking at SOLID principles and design patterns through the lens of production code. The brittle base class trap, composition over inheritance, and real-world uses for Strategy and Observer patterns.
Read More →Operating Redis, RabbitMQ, and Kafka in Production: Avoiding Common Bottlenecks
When middleware stalls, the entire backend grinds to a halt. Practical advice for detecting Redis big keys, managing RabbitMQ DLX queues, and surviving Kafka rebalance storms.
Read More →Frequently Asked Questions (FAQ)
Everything you need to know before getting started.
Send an invitation using your partner's registered email. Once accepted, your shared ledger syncs instantly in real time.
Yes. We enforce Supabase Row Level Security (RLS) and strict transaction isolation so only verified partners have access to shared data.
Yes! Besides modern web browsers, we fully support dedicated iOS and Android mobile apps for a fast, native mobile experience.
Yes, core transaction recording, shared ledger sync, and visual statistics are free to use for everyone.
Yes! With our Guest Mode, you can immediately test all core features like logging transactions and viewing charts without signing up.