# Currency Challenge vs BrainLine

The clearest difference is in-app purchases: Currency Challenge at none against BrainLine's 10. Currency Challenge also leads on iOS requirement (11.0 vs 16.4). BrainLine's advantage is update cadence (every 5 days vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. BrainLine sells 10 in-app purchases, starting at $12.99 per 7 days. Currency Challenge asks for nothing beyond the download.

Currency Challenge ships an update every 5 months, BrainLine every 5 days. The most recent releases landed on September 14, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Currency Challenge | BrainLine |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 days** |
| Size | 41 MB | 80 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lanza Entertainment Company, LLC](https://appshunter.io/developer/738536139) | [紫涵 张](https://appshunter.io/developer/6779268634) |

## What reviewers say

### Currency Challenge

[App page](https://appshunter.io/ios/app/currency-challenge/id1025252708)

**Features:** macOS Compatibility

**In-app purchases:** none


### BrainLine

[App page](https://appshunter.io/ios/app/brainline-daily-iq-test/id6802955708)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MindStroke Premium | $12.99 | per 7 days |
| MindStroke Premium | $14.99 | per 7 days |
| MindStroke Premium | $19.99 | per 7 days |
| MindStroke Premium | $29.99 | per year |
| MindStroke Premium | $39.99 | per year |
| MindStroke Premium | $49.99 | per year |
| MindStroke Premium | $59.99 | per year |
| MindStroke Premium | $69.99 | per year |
| MindStroke Premium | $79.99 | per year |
| MindStroke Premium | $89.99 | per year |


## Frequently asked questions

### Is Currency Challenge free?

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

### Is BrainLine free?

BrainLine is free to download, with in-app purchases available.

### Do Currency Challenge or BrainLine have ads?

Neither Currency Challenge nor BrainLine shows ads.

### Which is updated more often, Currency Challenge or BrainLine?

Currency Challenge ships an update every 5 months, and BrainLine every 5 days. Most recently, Currency Challenge was updated on September 14, 2026 and BrainLine on September 18, 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.*