# Threejs Code Play vs Bias Drill

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.

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

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.

## The numbers

| Metric | Threejs Code Play | Bias Drill |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 35 months | **Every 4 days** |
| Size | 13 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Merbin Joe](https://appshunter.io/developer/1281696078) | [Marian Camille Aviles](https://appshunter.io/developer/6812582256) |

## What reviewers say

### Threejs Code Play

[App page](https://appshunter.io/ios/app/threejs-code-play/id1286867736)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Bias Drill

[App page](https://appshunter.io/ios/app/bias-drill-trading-practice/id6812582254)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bias Drill Pro | $4.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*