Comparison

KEWPAT vs Stack Testers Friend

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

Head to head
About

KEWPAT

This app streamlines portable appliance testing (PAT) and test and tag procedures for iPhones and iPads. It allows manual logging of results, remote control of specific testers, and comprehensive data storage for multiple customers and sites. Users can customize fields, scan barcodes, and attach photos for detailed record-keeping.

Highlights
  • Manual PAT testing data logging
  • Remote control of Kewtech SMARTPAT
  • Import/export data with SimplyPats software
  • Barcode scanning for data entry
  • Photo capture with annotations
  • Customizable user-defined lists
  • Risk assessment tool for retest periods
Features
Read full description

PAT (Portable Appliance) Testing / Test and Tag App for your iPhone or iPad. Designed to work with SimplyPats - Data can be imported and exported too and from SimplyPats Version 7 or SimplyPats Version 7 Manual Plus Edition PAT Testing Software** (for Windows OS). Manually log your PAT Testing Results using your iPhone or iPad, and if you own a Kewtech SMARTPAT you can control the PAT Tester via Remote mode using the App. The Database used by KEWPAT is capable of storing large amounts of PAT Test Data between single (if in-house Testing) or multiple (if PAT Testing as a Contractor) Customers, and is designed to be compatible with the SimplyPats Manual Plus or Downloading Edition software, available seperately. Information such as the Customer Contact details, Sites, Locations, Appliance Id's, Descriptions, Retest Periods as well as detailed Test Results can all be entered and stored. If you need to record extended information such as: Make, Model, Fuse, Serial Number, Price and Repair info and other information, you can choose to display the Extra Info screen during the Test Sequence. Detailed Visual Test Information can also be recorded with individual checks for Socket, Plug, Switch, Flex and Body as well as OK for continued use and suitable for the environment it’s operating in. As with the Extra info, this is an optional screen that can be turned on during the Test Sequence, otherwise just an overall Visual Test status will be recorded. Fields with the "Hold For List" option let you either type information in using the on screen keyboard, or select pre-defined entries from a list. You can add your own entries to any list which is a great way of entering frequently used Appliance Descriptions, Sites, Locations, Notes, Makes and Models etc. Scanning of Barcodes are supported for data entry of Appliance Id or Serial Numbers. QR Codes can be read using your main camera where they have been printed out via the KEWPAT App using a compatible Bluetooth Printer (available separately). Limits and Results for each test are pre-configured but can be overwritten or selected from a list. The Resistance Calculator can also be used to set the Limit for Earth Bond in Manual Mode. Both Visual and Electrical Retest Periods can be set manually or calculated automatically using the Risk Assessment tool. Support for taking photos is included. The App can be configured in various ways depending on what PAT Testing information you need to record. Features at a glance: - Export Data to SimplyPats** - Import SimplyPats Data Files (ideal for repopulating the App with Data) - Remote Control Kewtech SMARTPAT. - Quick Manual entry of data for non downloadable PAT machines. - Barcode Scanning.* - Take Photos.* - Annotations (Arrows) on Photos. - Comprehensive search and Filter of test results. - Easy Custom Test setup for SMARTPAT. - User definable lists for Appliance Descriptions, Sites, Locations. - Extra Notes fields, Make Model, Appliance Serial Number which can be switched off if not wanted. - IET COP Rev 4 Extended Visual Questions (again can be switched off is simple Visual Pass and Fail required. - Ability to print labels using a Compatible Bluetooth Printer. - Multiple Barcode label formats including QR and Code39. - Inbuilt Resistance calculator to calculate resistance of Cables by CSV and length. - Inbuilt Risk calculator to give suggested IET COP Rev 4 retest periods. - Collect customer signature on App on completion of work. - Email summary of tests direct to Customer. - Ability to store 10's of thousands of assets and test results. - Flip between Dark or Light Colour schemes. - Charge and repair Codes compatible with SimplyPats. - Repeat Last Test using SMARTPAT. - Auto increment Appliance Id (inc Alpha Prefix). * Certain features or functionality may depend on your device and the hardware available. Features may change without notice

About

Stack Testers Friend

This mobile toolkit provides essential on-site calculations for stack testers. Quickly perform gas conversions, probe position calculations, and other vital engineering tasks without needing a laptop. It's designed for environmental engineers needing immediate access to data while working in the field.

Highlights
  • Gas conversion calculations
  • Isokinetic sample position calculations
  • Extraction rate calculations
  • Gas density calculations
  • Particulate matter normalization
  • Calibration function calculations
Features
Read full description

The app has been developed by the Engineers of CES Environmental Instruments, one of the UKs leading environmental Test Houses and incorporates some of their on-site calculations in one easy to use app. When working on the stack and you need that quick answer to a gas conversion or probe position, the answer can be at your fingertips. Simple and easy to use the app contains lots of essential calculations for the stack tester without the need to manually calculate the value or start up a laptop. The app is an essential tool for the professional Environmental engineer having all the tools to quickly check the numbers whilst out and around site. The contents of the CES Environmental Instruments popular Engineers Note Book is preloaded within the app. The app can do the following and much more: - Calculate Dia, CSA, Circ. - Isokinetic sample positions, General & Tangential - Extraction rates - Gas density - Calculate H20 from wet & dry Oxygen - Gas ppm/mg/mΒ³ conversions & Normalisation - LOD - Particulate Matter Normalisation & estimation of temp, H2O & O2 - Ranging & scaling of dust monitors & outputs - Calculation of values using calibration functions - Biomass fuels

Screenshots

KEWPAT3 screens
Stack Testers Friend4 screens

Verdict

The call

The clearest difference is review sentiment: Stack Testers Friend at 100% against KEWPAT's 35%. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

KEWPAT ships an update every 4 months, Stack Testers Friend every 7 months. The most recent releases landed on September 11, 2026 and July 7, 2026 respectively.

Scorecard1 real difference Β· 7 level
KEWPAT versus Stack Testers Friend: the parameters behind the verdict, then further details
ParameterKEWPATStack Testers Friend
PriceFreeFree
Positive reviews34.8% of reviews100.0% of reviews β€” better
Update frequencyEvery 4 months β€” betterEvery 7 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 β€” better13.0
Further details β€” not scored
Size12 MB33 MB
Age rating4+4+
DeveloperRSR Systems LtdLewis Holmes

Customer experience

KEWPAT

Written reviews23 reviews
Positive34.8%
Neutral21.7%
Negative43.5%

Stack Testers Friend

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

KEWPAT

No in-app purchases

None

Stack Testers Friend

No in-app purchases

Questions

Is KEWPAT free?
KEWPAT is free to download, with no in-app purchases.
Is Stack Testers Friend free?
Stack Testers Friend is free to download, with no in-app purchases.
Do KEWPAT or Stack Testers Friend have ads?
Neither KEWPAT nor Stack Testers Friend shows ads.
Which is updated more often, KEWPAT or Stack Testers Friend?
KEWPAT ships an update every 4 months, and Stack Testers Friend every 7 months. Most recently, KEWPAT was updated on September 11, 2026 and Stack Testers Friend on July 7, 2026.

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