# Reaction Speed Test Pro vs White Nightmare

The clearest difference is ads: Reaction Speed Test Pro at none against White Nightmare's shown. Reaction Speed Test Pro also leads on update cadence (every 2 days vs every 16 months) and price ($0.99 vs $1.99). On in-app purchases, device support and iOS requirement there is nothing between them.

Reaction Speed Test Pro costs $0.99 and White Nightmare $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Reaction Speed Test Pro ships an update every 2 days, White Nightmare every 16 months. The most recent releases landed on October 11, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Reaction Speed Test Pro | White Nightmare |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 16 months |
| Size | 6 MB | 90 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anatoliy Voropay](https://appshunter.io/developer/459700393) | [Oscar Tsang](https://appshunter.io/developer/416987065) |

## What reviewers say

### Reaction Speed Test Pro

[App page](https://appshunter.io/ios/app/reaction-speed-test-pro/id1603215049)

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

**In-app purchases:** none


### White Nightmare

[App page](https://appshunter.io/ios/app/white-nightmare/id1625222921)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Reaction Speed Test Pro free?

Reaction Speed Test Pro costs $0.99, with no in-app purchases.

### Is White Nightmare free?

White Nightmare costs $1.99, with no in-app purchases.

### Do Reaction Speed Test Pro or White Nightmare have ads?

White Nightmare shows ads; Reaction Speed Test Pro does not.

### Which is updated more often, Reaction Speed Test Pro or White Nightmare?

Reaction Speed Test Pro ships an update every 2 days, and White Nightmare every 16 months. Most recently, Reaction Speed Test Pro was updated on October 11, 2026 and White Nightmare on October 21, 2026.

---

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