Comparison

TestCard ProHD 4k vs PhaseChecker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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

About

PhaseChecker

This utility app tests your sound system to ensure speakers are correctly wired and in-phase. It offers manual and automatic modes, with advanced waveform analysis for precise setup. Proper phasing is crucial for optimal bass response and stereo imaging.

Highlights
  • Speaker phase and polarity testing
  • Manual and automatic test modes
  • Microphone-based analysis
  • Waveform view for advanced users
  • In-app help and guidance
  • Audio output connection
Features
Read full description

The PhaseCheck app will run a test signal through your sound system to ensure your speakers are in-phase and wired with the correct polarity. It can be run either manually or automatically.  Manual mode allows you to run the test signal and flip the phase so you can listen yourself to ensure your sound system is setup correctly.  Automatic mode will run a series of test signals through your sound system and use the microphone on the device to analyse the results. New in version 2.0 is a waveform view mode for advanced use. It allows you to play an asymmetrical waveform (ramp waveform), record the sound from each speaker close up and capture the waveforms to then compare them. Phase is a difficult concept so full help is available in the app to ensure you get the best results. You should check the phase of your sound system whenever the wiring has been changed to ensure everything is the correct polarity. When a sound systems speakers are out of phase the sound quality is affected massively. Bass is reduced significantly and stereo imaging gives the illusion of the sounds pulling outside of the room. To run the check connect your iOS device to your sound system so it can play audio. If possible place the iOS device evenly between the speakers. Phase cancellation will not occur close to the speakers so ensure the device is not too close. Ensure the volume is at a comfortable listening level and if possible ensure there is no background noise to interfere with the scan.

Screenshots

TestCard ProHD 4k4 screens
PhaseChecker3 screens

Verdict

The call

The clearest difference is price: TestCard ProHD 4k at Free against PhaseChecker's $0.99. TestCard ProHD 4k also leads on rating (3.1 vs 2.0) and update cadence (every 6 months vs every 43 months). PhaseChecker's advantage is in-app purchases (none vs 1) and iOS requirement (14.1 vs 17.6). On ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

TestCard ProHD 4k is free to download; PhaseChecker costs $0.99 up front. TestCard ProHD 4k sells 1 one-off in-app purchase. PhaseChecker asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

TestCard ProHD 4k holds the better App Store score, 3.1 against 2.0. Both are backed by a comparable volume of ratings — 8 and 3 respectively. Written reviews point the same way: 36% of TestCard ProHD 4k's written reviews are positive against 16% of PhaseChecker's.

UpkeepUpdate frequency

TestCard ProHD 4k ships an update every 6 months, PhaseChecker every 43 months. The most recent releases landed on June 7, 2026 and September 17, 2026 respectively.

Scorecard7 real differences · 3 level
TestCard ProHD 4k versus PhaseChecker: the parameters behind the verdict, then further details
ParameterTestCard ProHD 4kPhaseChecker
PriceFree — better$0.99
Rating3.1 (8 ratings) — better2.0 (3 ratings)
Positive reviews36.4% of reviews — better15.8% of reviews
Number of ratings8 — better3
Update frequencyEvery 6 months — betterEvery 43 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, Apple TViPhone, iPad, iPod
Requires iOS17.614.1 — better
Further details — not scored
Size60 MB1 MB
Age rating4+4+
DeveloperJ.S. Technology Ltd.Rick Peacock

Customer experience

TestCard ProHD 4k

All ratings8 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews11 reviews
Positive36.4%
Neutral0.0%
Negative63.6%

PhaseChecker

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews19 reviews
Positive15.8%
Neutral0.0%
Negative84.2%

In-app purchases

1 purchases

TestCard ProHD 4k

One-time1
  • Test Cards$4.99
None

PhaseChecker

No in-app purchases

Questions

Is TestCard ProHD 4k free?
TestCard ProHD 4k is free to download, with in-app purchases available.
Is PhaseChecker free?
PhaseChecker costs $0.99, with no in-app purchases.
Which has better reviews, TestCard ProHD 4k or PhaseChecker?
TestCard ProHD 4k is rated higher. TestCard ProHD 4k averages 3.1 out of 5 from 8 ratings, while PhaseChecker averages 2.0 from 3 ratings.
Do TestCard ProHD 4k or PhaseChecker have ads?
Neither TestCard ProHD 4k nor PhaseChecker shows ads.
Which is updated more often, TestCard ProHD 4k or PhaseChecker?
TestCard ProHD 4k ships an update every 6 months, and PhaseChecker every 43 months. Most recently, TestCard ProHD 4k was updated on June 7, 2026 and PhaseChecker on September 17, 2026.

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