Show HN: I built a finance app for couples after 9 years of Google Sheets

2 craigbanach 0 9/8/2025, 9:51:37 PM craig.banach.dev ↗

After tracking finances in Google Sheets since 2016 (currently at column XE - 657 columns), I finally built the app my wife and I needed. The breaking point was yet another argument about a forgotten Amazon purchase that broke our budget.

personifi is intentionally simple - real-time sync between partners, individual logins with shared data, and transaction entry that takes 12 seconds on mobile. Built with Next.js, .NET, and Postgres, running on a €4.55/month Hetzner VPS with Nomad orchestration.

The most validating moment: my wife told me she actually prefers it to our spreadsheet. After 9 years of her tolerating my spreadsheet obsession, that's worth more than any metric.

Currently at 2 DAU (us), but opening it up at £4.99/month for couples who want to stop arguing about money. Also included our free Google Sheets template if you prefer that route.

Blog post about building it: https://craig.banach.dev/musings/i-built-an-app App: https://personifi.xyz

Happy to answer questions about the technical stack, the couples-first approach, or why I chose Nomad over K8s for orchestration.

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Show HN: I built a finance app for couples after 9 years of Google Sheets

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