# C3 Display Controller vs Dead Pixel Test

The clearest difference is in-app purchases: C3 Display Controller at none against Dead Pixel Test's 3. C3 Display Controller also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.0). Dead Pixel Test's advantage is update cadence (every 3 weeks vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Dead Pixel Test sells 3 in-app purchases, starting at $1.99 per month. C3 Display Controller asks for nothing beyond the download.

C3 Display Controller ships an update every 2 months, Dead Pixel Test every 3 weeks. The most recent releases landed on September 10, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | C3 Display Controller | Dead Pixel Test |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dead-pixel-test-screen-check/id6760838375/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 40 MB | 9 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [nhnhn](https://appshunter.io/developer/1839898006) | [BULPARA TEKNOLOJI LIMITED SIRKETI](https://appshunter.io/developer/1552593177) |

## What reviewers say

### C3 Display Controller

[App page](https://appshunter.io/ios/app/c3-display-controller/id6757577137)

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

**In-app purchases:** none


### Dead Pixel Test

[App page](https://appshunter.io/ios/app/dead-pixel-test-screen-check/id6760838375)

Diagnose your device's screen for issues like dead pixels, burn-in, and touch response. Offers comprehensive tests and reports, with a Pro version for advanced features and pre-purchase inspections. Prioritizes user privacy with on-device processing.

**Highlights:** Dead pixel detection, Touch screen testing, OLED burn-in detection, Refresh rate and response time checks, Color accuracy and gamut testing, Screen uniformity analysis, Pixel fix tool

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |
| Premium Weekly | $1.99 | per 7 days |
| Premium Annual | $24.99 | per year |


## Frequently asked questions

### Is C3 Display Controller free?

C3 Display Controller is free to download, with no in-app purchases.

### Is Dead Pixel Test free?

Dead Pixel Test is free to download, with in-app purchases available.

### Do C3 Display Controller or Dead Pixel Test have ads?

Dead Pixel Test shows ads; C3 Display Controller does not.

### Which is updated more often, C3 Display Controller or Dead Pixel Test?

C3 Display Controller ships an update every 2 months, and Dead Pixel Test every 3 weeks. Most recently, C3 Display Controller was updated on September 10, 2026 and Dead Pixel Test on August 16, 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.*