Understudy: Investing Practice

Understudy: Investing Practice

Stock simulator, no real money

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Free
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Details

  • Released
  • Updated
  • September 25, 2026
  • October 2, 2026

Features

Understudy: Investing Practice screenshot #1 for iPhone
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About

Understudy is an educational investing simulator. It uses practice money only — no real accounts, no real trades, and nothing in it is investment advice. Most people learn investing the expensive way: with real money, on a real day, with no idea what a limit order or settled cash actually means until it costs them. Understudy lets you rehearse first. There's no phone number to give and no brokerage account to open. Understudy starts on its own with an anonymous session, and nobody on the other end is trying to move you into real trades. HOW IT WORKS • Open a practice brokerage account funded with simulated cash. • Browse real fund names and fictional stocks at simulated prices. • Place real-style orders — market, limit, stop, stop-limit — and watch them fill, partially fill, or get rejected, with a plain-English explanation of why. • Advance time a day, a week, or a month. Cash settles, dividends land, markets drop — and when something needs you, the clock stops and tells you what it means for you. • Learn each concept the moment you meet it: bid and ask, buying power, settlement, slippage, cost basis, holding periods, wash sales. THE INTERFACE GROWS WITH YOU Your first order ticket asks three things: buy or sell, how much, and what kind of order. As you learn, timing and the fine print appear — until you're reading the same seven-field ticket a real brokerage shows. YOUR NUMBERS, YOUR SIMULATION Enter your own income, savings, and expenses (self-reported) so every scenario runs against figures that mean something to you. Nothing is verified, and no real account is ever connected. Your figures and progress are kept with your Understudy account so they survive a reinstall. Sign in with Apple or Google to take them to another device, and delete them any time in Settings. WHAT'S FREE • The Stocks path in calm and volatile markets, one practice session at a time • Market and limit orders • Every Stocks lesson, with each term explained when you meet it • Your Activity dashboard and session history • Sync across devices when you sign in PREMIUM UNLOCKS • Real estate, business, and bond paths • Historical replays — practice through 2008 and 2020 • Stop and stop-limit orders • Advance straight to a date • Several sessions running at once • The full Outcome Dashboard: key decisions and alternative timelines Premium is available as a weekly or annual subscription (the annual plan includes a 7-day free trial) or as a one-time lifetime purchase. Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period and are managed in your Apple Account settings. Every price in Understudy is simulated. Bond funds follow the shape of published Treasury yield history; everything else is generated from calibrated statistics or is fictional. Past or simulated performance never predicts real results. Understudy is not a broker, adviser, or bank, and it can never place a real trade. Terms of Use: https://bertolabs.com/understudy/terms Privacy Policy: https://bertolabs.com/understudy/privacy
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What's New in Understudy

1.6.0

October 2, 2026

Understudy now keeps track of what you've practiced, and asks for your call before it explains. PRACTICE THAT FADES, AND COMES BACK • A concept you've proven fades if you haven't used it in a while. Its ring segment turns to Revisit, and one quick question brings it back. • Concept sheets change with what you know: a worked example in numbers first, then the same ticket with the last step blank, then just the rule. • Each cluster in the Concept Library has a guidebook: what ties its concepts together, and one situation worked several ways. YOUR CALL, FIRST • Before you place an order, you can say how sure you are. The outcome screen leads with your call, what happened, and the one line that explains the difference. • Your first market order asks what you'll pay a share before anything else, and shows you once it fills. TODAY'S DECISION, PICKED FOR YOU • Today's two topics now come from what's slipping: never two of the same kind, and never yesterday's kind. Once you've proven a concept, it comes back as a harder version. A PLAN FOR TOMORROW • Session Complete leads with what you did, then ends with one sentence you finish: "Tomorrow, after my coffee, I'll start the Volatile market." The daily reminder, if you turn it on, follows that moment and names what's open. NEW HERE? • Three quick questions come before your numbers. There's no score, and each answer gets a one-line explanation. Everything in Understudy is still practice money, and nothing in it is investment advice.

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Understudy Premium Weekly

Full access, billed weekly. Cancel anytime.

$7.997 Days
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