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How we brought a family's finances, time, relationships and health together into a single app.

One app that brings finances, time, relationships and health together — with an AI assistant wired into your own data.

Year

2026

Our role

End-to-end multi-area product + AI integration

Custom softwareAI integrationData architectureWeb apps (PWA)

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The project

Fersity is a personal life-management platform: finances (budget, cashflow and net worth), time (planning and habits), relationships (people) and health (workouts and metrics), all in one place. We designed and built the product end-to-end, with a modular architecture and an AI assistant wired into the user's real data.

Stack

Vue 3ViteSupabasePostgreSQL + RLSMCPVercel Edge FunctionsResend

The challenge

Personal life is scattered across 7-10 disconnected apps and a handful of spreadsheets: one for money, one for the calendar, one for contacts, one for the gym. Nothing connects, and nothing gives the full picture.

The goal was a single trustworthy place — a personal operating system — where finances, time, relationships and health live together without turning into cold, generic SaaS.

Our approach

We built a multi-area platform on Vue 3 and Supabase, with a normalized data model and per-user row-level security (RLS). And we opened that data up to AI through an MCP server, so an assistant can query it and act on it safely.

Budget & net worth: monthly cashflow, net-worth tracking and fiscal reporting.
Calendar & planning: goal blocks, a weekly planner, tasks and habit reports.
People: relationship management with modes, shared lists and an email digest.
Health: workout logging and body metrics.
AI assistant wired into your data via MCP (20+ tools).
Multi-area PWA: each area installable on its own.
Normalized data with per-user RLS and EU data residency.

The product

Fersity — patrimonio neto y asignación de activos — Net worth, asset allocation and committed investments in a single view. (Sample data.)

Fersity — configuración avanzada del patrimonio — Advanced per-asset configuration: liquidity, expected return and target allocation. (Sample data.)

Fersity — planner semanal por bloques — Weekly block planner: the time and habits area. (Details blurred for privacy.)

Fersity — presupuesto operativo mensual — Operating budget: income, rentals and aid planned month by month. (Figures blurred for privacy.)

How we built it

Vue 3 + Vite on the front end; Supabase on the back (PostgreSQL with a normalized 30+ table model and RLS on every table), Vercel + Edge Functions for real-time processing, and Resend for email.

The differentiator is a custom MCP (Model Context Protocol) server that exposes the user's data to AI assistants through typed tools, with token auth, a fail-closed design and an audit log that never stores sensitive values.

Results

Fersity is live and continuously evolving: four corners of personal life that used to be separate now work as a single product — and are safely queryable by AI.

7

integrated areas (finances, time, people, health…)

20+

MCP tools that open the data up to AI

30+

tables with per-user RLS

EU

data residency (Supabase eu-west-1)