Fairdue

Overview

Splitting a shared Netflix or Spotify bill with friends or family always ends the same way: someone tracks it in a spreadsheet, and someone else has to be chased down every month. Nobody wants to be either person.

Fairdue replaces that with an invite-by-link group, automatic cost splitting per subscription, and a settle-up flow that keeps the running balance visible instead of buried in a chat thread. It's built as a real product from the start, including i18n, so it works in Hungarian and English out of the box.

Features

• Create a group and invite people by shareable link, no account required to view an invite
• Add shared subscriptions or bills and split cost automatically across group members
• Running balance view — who owes whom, kept visible instead of buried in chat
• Settle-up flow to close out a balance
• Full English/Hungarian localization from day one
• Email notifications for new charges and settle-up requests

Technologies

• Next.js 16 (App Router), React 19
• Prisma 7 + Postgres
• NextAuth v5 — accounts
• next-intl — locale-aware routing and copy
• Resend — notification email
• Phosphor Icons, Tailwind CSS

Technical highlights

• Per-subscription cost-splitting logic across a group whose members can join at different times — the actual hard part is computing a fair running balance, not just dividing a number by N
• i18n built in from the start via next-intl rather than retrofitted, with fully locale-aware routing
• Marketing site includes structured data (JSON-LD) and a comparison table against the "spreadsheet" status quo

Status

Personal product, pre-launch. 12 commits.