Comparison

Threejs Code Play vs Bias Drill

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Threejs Code Play

Features
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3DThreejs Code Play is a powerful Three.js and WebGL learning app designed for students, beginners, web developers and programmers who want to learn 3D web development and create interactive 3D graphics using JavaScript. Learn Three.js step by step, explore practical examples, write code in the built-in editor and instantly preview your 3D output. Study scenes, cameras, objects, lighting, textures and animations while practicing real 3D web development directly on your iPhone or iPad. LEARN THREE.JS & WEBGL Understand the fundamentals of modern 3D web development through structured tutorials and practical examples. Explore topics such as: • Three.js basics • WebGL concepts • 3D scenes • Camera setup • 3D objects • Geometry • Materials • Lighting systems • Textures • Animation • Interactive 3D graphics • HTML, CSS & JavaScript integration Each learning topic includes explanations and example code to help you understand how 3D graphics work in web applications. BUILT-IN THREE.JS CODE EDITOR Write and edit Three.js, JavaScript, HTML and CSS code directly inside the app. Experiment with existing examples, modify properties, create your own 3D scenes and test new ideas without needing a desktop coding environment. REAL-TIME 3D PREVIEW Write code and instantly see your Three.js output. Real-time preview helps you understand how changes to objects, cameras, lights, materials, textures and animations affect your 3D scene. This hands-on approach makes learning Three.js easier and more interactive. PRACTICAL EXAMPLES & SAMPLE PROJECTS Explore practical Three.js examples and sample projects to understand common 3D development techniques. Study the code, modify values and immediately see the result. This makes it easier to learn through experimentation instead of only reading theory. CREATE NEW FILES Start a fresh coding workspace whenever you want to build a new example, test an idea or create another Three.js project. OPEN EXISTING FILES Open supported files from your device and continue editing previous projects without rewriting your code. SAVE YOUR CODE Save your current work locally and continue your Three.js development later. SAVE AS Create another copy of your project with a different file name or location. This is useful for testing new ideas while keeping the original version unchanged. FIND IN CODE Quickly search for specific text, variables, functions or code inside your project instead of manually scrolling through large files. GO TO LINE Jump directly to a specific line number for faster navigation and editing. UNDO & REDO Reverse unwanted changes with Undo and restore them with Redo for a smoother coding experience. RESET EDITOR Clear your current workspace and start again whenever you want to create a fresh project. LEARN WITH HTML, CSS & JAVASCRIPT Practice combining Three.js with HTML, CSS and JavaScript to understand how interactive 3D web experiences can be created for modern websites and web applications. OFFLINE THREE.JS LEARNING The app is designed to support offline learning and coding, allowing you to study tutorials, explore examples and practice Three.js without requiring a continuous internet connection. BEGINNER-FRIENDLY 3DThreejs Code Play is suitable for: • Three.js beginners • WebGL learners • JavaScript developers • Web development students • Frontend developers • Programming students • 3D web developers • HTML, CSS & JavaScript learners • Developers exploring browser-based 3D graphics LEARN 3D WEB DEVELOPMENT ANYWHERE Turn your iPhone or iPad into a convenient Three.js learning and coding environment. Study 3D graphics concepts, explore sample projects, write JavaScript code, preview your scenes and improve your understanding of Three.js and WebGL through practical learning. Learn Three.js. Create 3D graphics. Write code. Preview instantly. Download 3DThreejs Code Play and start learning interactive 3D web development today.

About

Bias Drill

Features
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Look at the chart. Call the hidden candle. See if you were right. Bias Drill trains one skill: reading which way a candle will expand off its open. Each round hides one candle — weekly, daily or 4-hour. You call it Expand bullish, Flat or Expand bearish. Then it is revealed with its open, high, low and close, how far it ran on each side, and whether your call was right. HOW A CANDLE IS GRADED The close is ignored. The drill measures how far the candle ran above its open and how far below. If one side is at least twice the other, that is the direction. Otherwise the candle is flat. You can set that band to 1.5Ɨ, 2Ɨ or 2.5Ɨ. THREE TIMEFRAMES Drill weekly, daily or 4-hour candles. Switch at the top of the market menu; each timeframe keeps its own set. MARKETS • Five simulated markets, each shaped to the behaviour of a real one: Nasdaq-100 futures, S&P 500 futures, Bitcoin and an S&P 500 ETF. A sixth option deals a random character every set. Daily and 4-hour sets carry each market's own overnight gap, measured from real data. The bars are generated on your device, so they never repeat and can't be memorised. Each set holds 520 candles, and you can deal a new one whenever you like. • Real history: EUR/USD weekly since 1999 and WTI crude oil weekly since 1986, built from public-domain Federal Reserve and EIA daily prices. These sources publish one price a day, so highs and lows come from daily closes and wicks run shorter than on an intraday chart. • Your own data: import up to 8 CSV files, such as a TradingView chart export. The timeframe is read from the file, a candle still trading when you exported is left out, and thinly traded data is flagged. BUILT FOR PRICE-ACTION TRADERS If you study ICT or Smart Money Concepts, this drills the part those ideas turn on: which side of the open a candle expands into. Read the context — liquidity resting above and below, displacement, fair value gaps, order blocks, the weekly and daily profile — then call the candle and see it graded. Bias Drill is an independent practice tool and is not affiliated with, endorsed by or associated with any trading educator or course. TRACK YOUR READING • Accuracy, total calls and your streak • A matrix of what you called against what actually happened • Your most common miss, named plainly • A log of recent calls MAKE IT YOURS • Show 26, 52 or 80 candles of context • Show or hide dates • Light, dark or system appearance • iPhone and iPad PRIVATE BY DESIGN No account, no ads and no tracking. The app makes no network calls, and files you import stay on your device. PRICING Try it free for 30 calls. A single one-time purchase unlocks the drill for good. There is no subscription, and the unlock follows your Apple Account to your other devices. Your score and streak carry over. The simulated markets are generated, not historical prices. Bias Drill is a practice tool and does not give investment advice.

Screenshots

Threejs Code Play4 screens
Bias Drill4 screens

Verdict

The call

The clearest difference is in-app purchases: Threejs Code Play at none against Bias Drill's 1. Threejs Code Play also leads on iOS requirement (15.0 vs 17.0). Bias Drill's advantage is ads (none vs shown) and update cadence (every 4 days vs every 35 months). On price and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Bias Drill sells 1 one-off in-app purchase. Threejs Code Play asks for nothing beyond the download.

UpkeepUpdate frequency

Threejs Code Play ships an update every 35 months, Bias Drill every 4 days. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.

Scorecard4 real differences Ā· 2 level
Threejs Code Play versus Bias Drill: the parameters behind the verdict, then further details
ParameterThreejs Code PlayBias Drill
PriceFreeFree
Update frequencyEvery 35 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size13 MB1 MB
Age rating4+4+
DeveloperMerbin JoeMarian Camille Aviles

In-app purchases

None

Threejs Code Play

No in-app purchases

1 purchases

Bias Drill

One-time1
  • Bias Drill Pro$4.99

Questions

Is Threejs Code Play free?
Threejs Code Play is free to download, with no in-app purchases.
Is Bias Drill free?
Bias Drill is free to download, with in-app purchases available.
Do Threejs Code Play or Bias Drill have ads?
Threejs Code Play shows ads; Bias Drill does not.
Which is updated more often, Threejs Code Play or Bias Drill?
Threejs Code Play ships an update every 35 months, and Bias Drill every 4 days. Most recently, Threejs Code Play was updated on October 15, 2026 and Bias Drill on October 10, 2026.

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