Know exactly how your portfolio
actually performed.

Real return (TWR), drawdown, and true FIFO cost basis across all your brokers — every number traceable back to the transaction that produced it. No more spreadsheet you don't fully trust.

Get Started Free Log In
  • Same input → same output, every time. Change one transaction and see exactly what moved, and why.
  • Hash-chained audit trail — every figure traces to the event that produced it.
  • Your data, your import. No broker login, no black box, nothing phoning home.
  • Audit-ready export — download a hash-chained CSV of every event, price, and portfolio value, so you, your accountant, or an auditor can re-verify every figure independently.
Reproducible Valuation

The same scenario always produces the same result, regardless of when it is replayed. No hidden dependencies on live market data.

Immutable Ledger

Every event is stored with a cryptographic hash. Any tampering is immediately detectable — event by event.

Audit-Ready Export

Export a hash-chained CSV with every event, price, and portfolio value — ready for your accountant or auditor.

How it works

1
Enter your transactions

Buys, sells, dividends, fees, transfers — enter events in any asset or currency.

2
Price your assets

Add mark-to-market prices manually or auto-fetch historical closing prices via Yahoo Finance.

3
Export & verify

Download a tamper-proof CSV audit trail. Anyone can verify the integrity of your ledger independently.

Ready to see how your portfolio actually performed?

Free during the early access period.

Create your account

After registration, a pre-loaded read-only Demo scenario (AAPL · CSPX.L · BTC · 2022–2025) appears on your profile — ready to explore immediately. It's locked so you can't accidentally change it; click “Duplicate to edit” to get a fully editable copy and unlock every feature (importing, editing, fetching prices).