# Binary Challenge vs CDP Knowledge Test

The clearest difference is in-app purchases: Binary Challenge at none against CDP Knowledge Test's 2. Binary Challenge also leads on device support (3 vs 1) and iOS requirement (15.6 vs 17.2). CDP Knowledge Test's advantage is update cadence (every 3 months vs every 61 months). On price and ads there is nothing between them.

Both are free to download. CDP Knowledge Test sells 2 in-app purchases, starting at $11.99 per month. Binary Challenge asks for nothing beyond the download.

Binary Challenge ships an update every 61 months, CDP Knowledge Test every 3 months. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Binary Challenge | CDP Knowledge Test |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 61 months | **Every 3 months** |
| Size | 3 MB | 9 MB |
| Requires iOS | **15.6** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ola Kaare Risa](https://appshunter.io/developer/1562401648) | [Cargo Teleport Inc](https://appshunter.io/developer/1761832181) |

## What reviewers say

### Binary Challenge

[App page](https://appshunter.io/ios/app/binary-challenge/id1564728589)

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

**In-app purchases:** none


### CDP Knowledge Test

[App page](https://appshunter.io/ios/app/cdp-knowledge-test/id6740606245)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly subscription | $11.99 | per month |
| Lifetime version | $24.99 | one-time |


## Frequently asked questions

### Is Binary Challenge free?

Binary Challenge is free to download, with no in-app purchases.

### Is CDP Knowledge Test free?

CDP Knowledge Test is free to download, with in-app purchases available.

### Do Binary Challenge or CDP Knowledge Test have ads?

Neither Binary Challenge nor CDP Knowledge Test shows ads.

### Which is updated more often, Binary Challenge or CDP Knowledge Test?

Binary Challenge ships an update every 61 months, and CDP Knowledge Test every 3 months. Most recently, Binary Challenge was updated on September 17, 2026 and CDP Knowledge Test on September 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.*