MyFirstDouble compresses 10 years of real market history into a 10-week simulation. Your son writes a thesis before every allocation. No guessing. No luck. Just conviction, tested against reality.
100% simulated · Real historical data · Free to start
You can't go back and fix your own timeline. But you can change his. MyFirstDouble teaches the one financial skill that changes everything: the discipline to think before you allocate.
Each real week equals one simulated year. Every Sunday, you rebalance across 14 curated ETFs. But you can't just click and allocate. You have to think first.
For every position above 0%, write at least 40 words explaining why. Declare conviction. Name the risk. The submit button stays locked until you do.
Distribute 100% across US equities, sectors, and bonds. This is your complete investment view for the year — no hedging with cash.
Prices move daily using real historical data. Deterministic interpolation of actual annual returns. By Wednesday, you're halfway through the year.
Your theses sit alongside outcomes. A portfolio that outperformed for the wrong reasons is a liability, not a win.
Your thesis journal is permanent. No editing. No pretending you saw it coming. Just your words, timestamped, measured against reality.
The difference between a lucky investor and a skilled one is the ability to articulate why before the outcome is known.
Divide 72 by your annual return rate. That's how many years until your money doubles. At 10% annual returns, every 7.2 years your wealth multiplies by 2×.
Years until your money doubles
$10,000 invested at age 22 becomes $1.28M by age 71. The earlier you start, the more doubles you get.
Broad enough for real strategy. Narrow enough to build conviction.
"I spent 20 years investing on gut feel. Made money, sure — but I couldn't tell you why half my picks worked. I started this with my son as a weekend thing. After 4 weeks he was explaining sector rotation to me at dinner. That's when I knew this was different."
Try your first simulation for free. Upgrade when the discipline clicks.
All paid plans include a 30-day money-back guarantee. Cancel anytime. No questions asked.
Annual plans available: Investor $79/yr (save 27%) · Family $169/yr (save 26%)
The Rule of 72 is a shortcut: divide 72 by your expected annual return to find how many years until your money doubles. At 10% returns, your money doubles every 7.2 years. It's the most powerful concept in personal finance — and the foundation of MyFirstDouble.
No. MyFirstDouble is 100% simulated. You start with a virtual $10,000 portfolio. The market data is real (historical prices from 2014-2023), but every dollar is virtual. Zero financial risk.
Each real week represents one simulated year. Every Sunday, you rebalance your portfolio across 14 ETFs — but first you must write a thesis explaining your reasoning. After 10 weeks (10 simulated years), you've experienced a full decade of market history and built a track record of decisions.
Anyone ready to think critically about investing. The sweet spot is 16-25, but many parents in their 40s and 50s use it alongside their kids. The 40-word thesis requirement ensures it's not a game — it's a thinking exercise.
Yes — the Family plan supports up to 4 players with a shared leaderboard. Many families run it as a Sunday ritual: everyone submits their thesis, debates allocation, and watches the results play out over the week. It's the best dinner table conversation you'll have about money.
No. Paper trading apps let you buy and sell without consequence. MyFirstDouble forces you to think: write a thesis, declare conviction, name risks, then watch reality unfold. The thesis journal is permanent — you can't edit or delete entries. It's not about making money. It's about developing the discipline to think before you allocate.
Every month he isn't learning about investing is another month of compound interest he'll never get back. The simulation is free. The discipline is priceless.
Begin Your First $10,000 →Free to start · No credit card required