# TestCard ProHD 4k vs Smart Pillow

The clearest difference is in-app purchases: Smart Pillow at none against TestCard ProHD 4k's 1. Smart Pillow also leads on update cadence (every 3 weeks vs every 6 months) and iOS requirement (13.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. TestCard ProHD 4k sells 1 one-off in-app purchase. Smart Pillow asks for nothing beyond the download.

TestCard ProHD 4k ships an update every 6 months, Smart Pillow every 3 weeks. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | TestCard ProHD 4k | Smart Pillow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (9 ratings)](https://appshunter.io/ios/app/testcard-prohd-4k/id705103583/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 36.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 60 MB | 5 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | **iPhone, iPad, Apple TV** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [J.S. Technology Ltd.](https://appshunter.io/developer/586233093) | [剑锋 李](https://appshunter.io/developer/1817216516) |

## What reviewers say

### TestCard ProHD 4k

[App page](https://appshunter.io/ios/app/testcard-prohd-4k/id705103583)

Calibrate your home theater's audio and visual elements with a suite of professional test cards. Diagnose lip-sync issues and optimize picture settings like contrast, brightness, color, motion, and sharpness. Includes an SPL meter for sound setup.

**Highlights:** Screen calibration for contrast, brightness, and color, Motion and sharpness test cards, SPL (decibel) meter for surround sound setup, Audio visual synchronization test for lip-sync, Instructions displayed on device while test card shows on external display, Compatibility testing before in-app purchase

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Test Cards | $4.99 | one-time |


### Smart Pillow

[App page](https://appshunter.io/ios/app/smart-pillow/id6538723152)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TestCard ProHD 4k free?

TestCard ProHD 4k is free to download, with in-app purchases available.

### Is Smart Pillow free?

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

### Do TestCard ProHD 4k or Smart Pillow have ads?

Neither TestCard ProHD 4k nor Smart Pillow shows ads.

### Which is updated more often, TestCard ProHD 4k or Smart Pillow?

TestCard ProHD 4k ships an update every 6 months, and Smart Pillow every 3 weeks. Most recently, TestCard ProHD 4k was updated on October 23, 2026 and Smart Pillow on October 27, 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.*