TestCard ProHD 4k vs Smart Pillow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TestCard ProHD 4k
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.
- 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
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Professionals use test cards to calibrate broadcast systems and cinemas use them too, so why shouldn’t home cinemas or theatres use them too? TestCard ProHD is the innovative means to calibrating your screen to ensure a consistent and correct representation of display media. (In-App purchase required after ensuring this will work on your TV / Display.) ** In-App purchase required after compatibility testing for full functionality. See below for why. ** Additionally, TestCard ProHD also now includes an SPL or “decibel” meter to assist with setting up surround sound sources. It’s a solution for calibrating both audio and visual elements within the home that can also be used in professional environments. Newest version now includes a Audio Visual Synchronisation test to help diagnose lip-sync issues. TestCard ProHD is the application for setting up a modern High Definition TV or projector. We’ve grouped together some common types of test cards as well as some new ones that will help set up home theaters to a professional standard. Adjusting the contrast and brightness is essential to ensuring that you get the best from your TV or projector, but color is vitally important too. Further, test cards for motion and sharpness tweak more performance from your screen. Using these test cards and their instructions you’ll be able to tweak to get the best you can without the expensive of a dedicated calibration service. Only by applying test cards in a controlled manner will you to get the best from your home theater and TestCard ProHD is the right tool, taking advantage of the unique abilities of the iPhone and iPad. Within modern screens there are many techniques used to smooth motion. These can also have a detrimental effect, yet correctly set some do improve the picture. Having a repeating pattern to assist the setting of motion controls is essential. TestCard ProHD has test cards specifically design for motion testing on a screen. Further, each test card has an information section to give you concise information and instruction on how to use it. The more that can be gained form each test card, the more information is provided. For ease of use the instruction are displayed on the iPhone / iPad while simultaneously displaying the test card on the external display. Access to the test cards on the external display, Virtual Blue Filter and the SPL meter are only available after an In-App purchase. Using the default test screen please ensure that you have tested your device with the media adaptor, or Apple TV, on the external display before purchasing access. This is to allow you to verify that your system is fully compatible before purchase, and to share a single purchase with your iOS devices and Apple TV. TestCard ProHD can be used with Apple TV V2, V3, V4 or V5 / 4k, or with the Apple media interfaces for HDMI or VGA. Apple TV V2 and V3 can be used as the external display interface using AirPlay Mirroring. Simply switch on AirPlay on the iPhone or iPad and select Mirroring. See below for instructions on AirPlay Mirroring. For HDMI or VGA Apple produces two types of media interface. While we’ve included some test cards for VGA / computer calibration, the home cinema user who is looking for 1080p compatibility should opt for the HDMI based media interface. Apple TV version of the app is also available. Once access to the testcards is bought on either iOS or Apple TV app, you can have access on the other type of device without additional purchase. The In-App-Purchase is shared between all compatible devices registered on your Apple ID. Apple TV AirPlay Instructions: To enable AirPlay Mirroring connect your iOS device and your Apple TV to the same Wi-Fi network. For iOS 7 swipe up from the bottom of your screen to access Control Center. Tap on the AirPlay icon, select your Apple TV and switch on Mirroring. More details can be found on Apple’s support page http://support.apple.com/kb/ht5209
Smart Pillow
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Sunrise Simulation Gently greet the day with a gradual increase in light that mimics a natural sunrise, making waking up a peaceful experience. Sunset Slumber Slowly dim the light to replicate a soothing sunset, signaling your body it's time to relax and prepare for sleep. White Noise Haven Drown out distractions with our white noise feature, creating a calm soundscape perfect for concentration or rest. Bluetooth Sync Connect wirelessly to your device and stream your favorite music or sleep sounds directly through our system. Meditative Guidance Enhance your relaxation with guided meditation sessions that lead you through calming exercises and peaceful thoughts. Rhythmic Entrainment Sync your mind and body with music rhythms that align with your breathing, promoting a sense of harmony and ease.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | TestCard ProHD 4k | Smart Pillow |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (9 ratings) — better | — |
| Positive reviews | 36.4% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Apple TV — better | iPhone, iPod |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 60 MB | 5 MB |
| Age rating | 4+ | 17+ |
| Developer | J.S. Technology Ltd. | 剑锋 李 |
In-app purchases
TestCard ProHD 4k
- Test Cards$4.99
Smart Pillow
No in-app purchases









