Your financial life, fortified.
Sharp, free tools for the self-directed investor — built for people who take charge of their finances, and would rather make their own decisions than pay someone 1% a year to make it for them.
Stock Lens
Should you buy Samsung through an ADR — or buy the primary listing directly on the Korea Exchange? Stock Lens tells you. It pulls live prices for both the ADR and the primary listing, converts to a common currency, factors in commissions and the ADR conversion ratio, and shows you which option is actually cheaper today.
It also shows the break-even FX rate and a 6-month currency trend — so you understand not just today's answer, but how sensitive that answer is to currency movement. No login. No data shared.
Live price comparison
ADR vs. primary listing prices pulled live and converted to a common currency.
Commission-aware math
Set your actual broker commission structure — the tool factors it in before comparing.
Break-even FX rate
See the exact exchange rate at which the two options cost the same, plus a 6-month FX trend.
No login required
Enter tickers and trade details — it does the rest. Nothing stored, nothing shared.
More tools on the way.
Stock Lens is the first. The decisions that get complicated when you have a real portfolio and no advisor on retainer — that's what we're building toward.
Tax-loss harvesting
Identify harvesting opportunities in your portfolio with wash-sale awareness built in.
Lot-based sell decisions
Which lots to sell to optimize tax impact. Built for people with real positions across multiple tax years.
Tax exposure tracking
Assess the impact of capital gains, dividends, and other investment income on your tax position — with alerts and suggestions to understand exposure and stay ahead of estimated pre-payments and penalties.
Questions or early feedback? hello@mj-labs.dev