About DollarTrader

Free tools to understand what your dollar is really worth. No signup, no paywall, sources on every number. Last updated October 2026.

What We Do

DollarTrader is a collection of free financial tools built to help everyday people understand the real value of money — across time, assets, borders, and inflation. The questions are simple: what is a dollar worth compared with last year, or 1913; what does a crypto ETF share actually hold; is it better to claim Social Security at 62 or wait; what does an expense ratio cost over twenty years; what does the national debt grow by while you read this sentence.

Most financial data is locked behind paywalls, buried in government PDFs, or requires an account to access. We believe that information should be free, visual, and easy to understand — and that every figure should say where it came from and when.

How We Source the Data

Crypto ETF holdings. Every Monday we read coins held, coins per share and shares outstanding for all 22 US-listed crypto ETPs and treasury companies from each issuer's own fund page — never from an aggregator — and record the issuer's as-of date. Quarter-end points are added from the fund's SEC 10-Q and 10-K filings (Schedule of Investments and balance sheet) and link to the filing. Where an issuer publishes only net assets and NAV, the coin count is back-solved and the row is flagged derived with its inputs shown. Non-staking funds are used as a control group: their per-share coin count must fall at exactly the fee rate, and the build refuses to publish if it doesn't. The result is the open dataset (CC BY 4.0, JSON and CSV), the per-fund pages, and the staking accretion analysis.

Everything else. Inflation uses the Bureau of Labor Statistics CPI-U series. The debt clock anchors to the Treasury's Debt to the Penny API each time it loads. Social Security rules follow the SSA's published reduction, delayed-credit and survivor formulas. Policy rates, mortgage rates and remittance costs are entered by hand from the Federal Reserve, Freddie Mac and the World Bank with the release date shown beside them. Spot prices come from public exchange APIs when a page loads. Where a number is an estimate — provider margins on the remittance tool, long-run market returns — the page says so.

AI agents can use the same data and calculators through our MCP server, listed in the Anthropic connector directory; llms.txt describes the endpoints.

Our Tools

• Staking Accretion — which crypto ETFs actually grow coins per share, measured from SEC filings against the issuer's advertised rate
• Crypto ETF Calculator — live NAV, premium/discount and holdings for 22 Bitcoin, Ethereum, Solana, XRP and Litecoin funds
• BTC ETF Comparison — the spot Bitcoin ETFs side by side
• ETF Fee Drag — what each expense ratio costs in real dollars over 5–20 years
• Per-fund pages — holdings history with filing links for every tracked fund
• Social Security Break-Even — claim early or wait, with COLA, market returns and the survivor benefit; downloadable report
• Inflation Calculator — purchasing power from 1913 to present
• Value of $1 — what a dollar buys in Bitcoin, gold, silver, oil and major currencies, live
• US National Debt Clock — anchored to Treasury data
• Send Money Abroad — compare transfer fees and rates
• Investment Calculators — DCA, leverage, funding fees and TP/SL sizing
• What If Calculator — recurring investment and averaging-down scenarios
• The Dollar Report — prices, debt, inflation and ETF data on one page
• Open Data — the holdings dataset, schema and MCP access
• Did You Know? — money facts with sources

Who Built This

DollarTrader is built and maintained by an independent developer with a background in finance, and a belief that good financial tools shouldn't cost anything to use. It is a one-person project: the same person writes the code, reads the filings and answers the email. We are not a bank, broker or investment adviser, and nothing here is personal advice. You can follow the weekly data on X at @dollardrp.

Corrections

If a number on this site disagrees with the issuer's page or the filing it cites, we want to know. Email hello@dollar-trader.com with the page and the source; verified corrections are made in the next weekly build and noted in the dataset's change log.

How We Stay Free

The site is supported by Google AdSense display advertising. We do not run affiliate programs, and provider links on comparison pages (such as the remittance tool) are plain links with no referral tracking. We never sell user data, and the calculators run in your browser — your inputs are not sent to us. See our Privacy Policy for full details.

Get in Touch

Feedback, bug reports, data questions or partnership inquiries — contact us here or write to hello@dollar-trader.com.