# King vs Tilted Prism

The clearest difference is price: King at Free against Tilted Prism's $14.99. King also leads on iOS requirement (9.0 vs 12.0). Tilted Prism's advantage is update cadence (fortnightly vs every 2 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

King is free to download; Tilted Prism costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

King ships an update every 2 months, Tilted Prism fortnightly. The most recent releases landed on September 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | King | Tilted Prism |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/king-devick-test/id1033607954/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 243 MB | 46 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [King-Devick Test, LLC](https://appshunter.io/developer/424793545) | [Hugo Branco](https://appshunter.io/developer/1669100326) |

## What reviewers say

### King

[App page](https://appshunter.io/ios/app/king-devick-test/id1033607954)

This app provides a quick and objective sideline concussion screening test for athletes. It helps identify potential concussions by assessing eye movements, attention, and concentration through a simple number-reading exercise. Requires an existing King-Devick Online account.

**Highlights:** Objective sideline concussion screening, Assess eye movements and attention, Administer baseline and post-injury tests, Works offline, Suitable for ages 5+

**Features:** macOS Compatibility

**In-app purchases:** none


### Tilted Prism

[App page](https://appshunter.io/ios/app/tilted-prism/id6572327221)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is King free?

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

### Is Tilted Prism free?

Tilted Prism costs $14.99, with no in-app purchases.

### Do King or Tilted Prism have ads?

Neither King nor Tilted Prism shows ads.

### Which is updated more often, King or Tilted Prism?

King ships an update every 2 months, and Tilted Prism fortnightly. Most recently, King was updated on September 15, 2026 and Tilted Prism on September 17, 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.*