MarketSim vs Order Book Trainer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MarketSim
Learn about the stock market and test trading strategies with a virtual stock game. Start with $10,000 virtual cash and place unlimited trades using live quotes and historical data. Monitor your portfolio with a beautiful and simple interface.
- Virtual stock market simulation
- Unlimited trading with $10,000 virtual cash
- Over 5000 tradeable symbols
- Live stock quotes and historical data
- Easy portfolio monitoring
- Beautiful and simple design
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Real markets. Play money. Start with $10,000 in virtual cash and trade real stocks at real prices. Build a portfolio, try out an idea, and see how it does without risking any real money. TRADING • Buy and sell stocks with virtual cash at real market prices. • Trade by dollar amount or number of shares, including fractional shares. • Orders placed while the market is closed fill at the next open. • See every order you've placed in your order history. RESEARCH • Search for companies by name or ticker. • Browse the day's most active stocks, top gainers, and top losers. • View price charts, company profiles, and key stats. • Add stocks to your watchlist to keep an eye on them. YOUR PORTFOLIO • Follow your portfolio's value over time. • See shares, average cost, and total return for each holding. • See how each position contributes to your portfolio. • Dividends are paid and stock splits are applied automatically. MARKETSIM PREMIUM • Up to 10 portfolios, each with its own cash, holdings, and history. • Pick any starting balance from $1 to $1 billion for new portfolios. • Refresh quotes anytime with no cooldown. • No ads. MarketSim is a simulator for learning and entertainment. All trades, balances, and returns are simulated. Virtual cash has no monetary value and cannot be withdrawn. Nothing in the app is investment advice. Market data may be delayed or inaccurate, and simulated performance does not predict real investment results. Premium is an optional subscription that renews yearly until canceled. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://thirdlinellc.com/#privacy-policy
Order Book Trainer
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Can you read the order book like a pro? Order Book Trainer: Level 2 is a training simulator that teaches the classic day-trading skill of reading the DOM (depth of market) and the time & sales tape — the same Level 2 information short-term traders watch every day. Watch bids stack up, feel the sell walls crumble, then make your call: is the next move UP or DOWN? Get scored on every read, build streaks, and watch your accuracy climb session after session. HOW IT WORKS • Watch the ladder — live bid/ask depth updating in real time • Read the tape — every print, size and aggressor side as it happens • Make the call — predict the next move before the timer runs out • Get graded — points, streak bonuses, accuracy and an S-to-D grade per session TWO MARKET STYLES • Tokyo style — banded tick tables, special quotes and daily price limits, just like the Japanese equity board • Global style — penny ticks and continuous trading in a classic DOM layout THREE DIFFICULTIES • Beginner — slower tape, shallow book, and live hints that teach you what the pressure means • Intermediate — real-time speed, full depth, no help • Pro — fast tape, strict scoring, and spoof walls designed to fake you out. Can you spot the fake orders? EARNINGS READING — NEW Read more than the book — read the financial statements too. One switch on the Home screen takes you to a quiz on reading earnings reports. • Six areas — balance sheet, income statement, cash flow statement, segments, ratios and guidance • Seven questions a set, against the clock — the faster and more accurately you read, the higher your score • Three levels, Lv1 to Lv3 — at Lv3 more than one answer can be right • Choose the standards you are tested on — US GAAP, IFRS and Japanese GAAP • Weak-point mode and a miss note to drill what you get wrong • An explanation for every answer and a built-in glossary — look up a term on the spot • Quick drills for a spare minute Statements are from fictional companies. Earnings reading needs an internet connection; questions and explanations are available in English and Japanese. TRAIN ANYWHERE, SAFELY There is no real market data, no account, no deposits — nothing to lose but your bad habits. This is a training tool, not investment advice. MADE FOR FOCUS • 11 themes — light, dark and pink/blue/yellow/green variants • 70+ languages • Session history with grades so you can track your progress GO AD-FREE (OPTIONAL) Want a distraction-free tape? The optional subscription removes every ad in the app. Subscriptions auto-renew unless cancelled; manage them anytime in your store account. The book is moving. Can you keep up?
Screenshots
Verdict
The clearest difference is update cadence: Order Book Trainer at every 3 weeks against MarketSim's every 2 months. Order Book Trainer also leads on iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. MarketSim sells 2 in-app purchases, starting at $19.99 per year and Order Book Trainer sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
MarketSim ships an update every 2 months, Order Book Trainer every 3 weeks. The most recent releases landed on October 20, 2026 and October 12, 2026 respectively.
| Parameter | MarketSim | Order Book Trainer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (21K ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 21K — better | — |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 41 MB | 74 MB |
| Age rating | 12+ | 4+ |
| Developer | Third Line LLC | Syncly Applications |
Bugs and requests
MarketSim
Reported bugs
3 issues- Stocks randomly showing $0 value
- Crashes when trying to buy/sell certain stocks
- Incorrect stock split handling
Requested features
5 requests- Add ability to short stocks
- Implement stock splits and dividends
- Include more advanced order types
- Add portfolio tracking and analytics
- Expand stock selection to include more options
Order Book Trainer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
MarketSim
- MarketSim Premium$19.991 Year
- Remove Ads$2.99
Order Book Trainer
- Ad-Free Pro – Monthly14 Days trial$1.991 Month
- Ad-Free Pro – Yearly1 Month trial$15.991 Year
Questions
Is MarketSim free?
Is Order Book Trainer free?
Do MarketSim or Order Book Trainer have ads?
Which is updated more often, MarketSim or Order Book Trainer?
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