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Fintech2024

Net Worth Ledger

A private net worth tracker that turns scattered accounts into one honest number over time.

Role
Sole developer
Timeline
3 months
Focus
Fintech

1

Screen for the full picture

10+

Account types supported

Local

Data stays private

The challenge

Anyone with a couple of bank accounts, a pension, some crypto and a mortgage has no idea what they are actually worth. Bank apps show fragments, and spreadsheets answer today's question but lose the history — which is the only part that tells you whether things are improving.

What I built

I built it around immutable monthly snapshots instead of live balances. Each account or asset gets a value entry per period, so the history is never overwritten and the trend is always computable. Multi-currency positions are converted at the rate of their own snapshot date rather than today's, which keeps historical charts truthful. Liabilities are modelled as first-class entries so the headline figure is real net worth, not a total of assets.

Outcome

One screen answers the only question that matters: is this going up, and because of what. Because the data model is snapshot-based, adding a new account never distorts the past.

Key capabilities

Monthly snapshots

Immutable period entries, so history stays intact no matter what you add later.

Assets and liabilities

Mortgages and loans modelled properly, so the headline number is genuine net worth.

Multi-currency, historically correct

Each snapshot converts at its own period rate instead of retroactively at today's.

Allocation and trend views

Composition over time, contribution per account, and growth broken out from deposits.

Stack

Next.jsTypeScriptPostgreSQLDrizzleRechartsTailwind CSS

Want something like this for your business?

Tell me what you are trying to build and I will tell you honestly what it takes to ship it.