This is a submission for the Gemma 4 Challenge: Build with Gemma 4
What I Built
Accounting Made Simple is a modern and very simple, work in progress, financial web app that helps users track organisations and evaluate the core accounting equation: Assets = Liabilities + Owner's Equity. It combines Japanese financial data sources (EDINET and J-Quants) with Gemini-powered AI analysis to give users quick insights into a company’s financial health, trends, and potential red flags.
Key capabilities:
- Organisation search and equity data lookup (currently targetting Japanese companies only)
- Persistent organisation/accounting equation storage with Prisma + PostgreSQL
- Magic-link authentication via Better Auth and Resend email
- Financial analysis generated by Gemma 4 from real balance sheet data
- Responsive UI built with Next.js 16, React 19, Tailwind CSS, and shadcn-inspired components
Demo
Code
Accounting Made Simple
A modern and simple web app for managing organisations and tracking the core accounting equation: Assets = Liabilities + Owner's Equity.
Built with:
- Next.js 16 + React 19
- Tailwind CSS v4 and shadcn/ui-inspired components
- Prisma 7 + PostgreSQL
- Better Auth with magic link login and Resend email delivery
- EDINET and J-Quants financial data sources for Japanese companies
- Gemini-powered financial analysis and insights
- Zod / Prisma Zod generator for typed schema validation
- Recharts for simple financial charts
Features
- Search organisations and equity data from EDINET/J-Quants
- Gemini-based analysis for selected financial data
- Store organisations, accounting equations, and user sessions in PostgreSQL
- Email-based magic link authentication via Resend
- Responsive, utility-first UI with custom components
- Prisma-generated types and database access layer
Getting Started
1. Clone the repository
git clone https://github.com/your-repo/accounting-made-simple.git
cd accounting-made-simple
2. Install dependencies
npm install
The repo runs prisma generate after install via postinstall.
3. Create .env
…
How I Used Gemma 4
I used Gemma 4 via the Google GenAI SDK to power the financial analysis experience in GeminiFinancialAnalysis.tsx.
- Model used: gemma-4-31b-it
- Reason: I chose the 31B Dense variant because it provides strong instruction-following and financial reasoning for structured company balance sheet data, while still being efficient enough for a production-style analysis flow.
- Role in the app: Gemma 4 reads balance sheet data fetched from EDINET/J-Quants, then generates plain-language insights about company health, trends, and risk signals that are rendered directly in the UI.
- This makes the app more than an accounting tracker — it becomes a finance assistant that helps users understand what the numbers mean.
