Comparison

Gas Checker vs Gastite Sizing App

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

Head to head
About

Gas Checker

Streamline your gas and heating business with digital reporting and invoicing. Automate customer reminders, create PDF reports, and integrate with accounting software. Eliminate paper forms and manage all your job documentation efficiently.

Highlights
  • Create PDF reports (certificates, invoices, quotes)
  • Automated customer reminders
  • Digital job sheets
  • Quickbooks/Xero integration
  • Cloud data sync
  • Eliminate paper forms
Features
Read full description

No1 software for Gas Installers and Heating Engineers and Plumbers in the UK and Ireland. Save time and money and Create Gas Reports, Invoices, Quotes, Job sheets and many more PDF reports and revolutionise your business. Never lose a customer again and maximise your repeat business automatically. Create digital documents for all your Gas and Heating related work. Get automated reminders each year to boost your annual repeat income. say good bye to paper forever. Link your account to Quickbooks and Xero and be MTD compliant. Gas Checker allows you to save, email and print them, this means you never have to carry a paper certificate book ever again. We include the following certificates:- Domestic Gas Safety Certificate, Gas breakdown/Service Record, Gas Warning Notice, Gas Service/Maintenance Check List, Leisure Industry Gas Safety Certificate, LPG Gas Safety Record. The app has many powerful features, which will help you fill in the required certificate easily and smoothly, all data can then be synced to the WEB so you will never lose it. Possibly the most useful App a Gas Engineer could wish for. Twitter @gaschecker When Registering for the first time after install, please make sure of the following 1) Ensure your username does not have any spaces ie Gas Checker - it should be GASCHECKER 2) Depending on the file size of your image will depend on the time it takes to Register your device. The Device needs to contact the Gas Checker server, So please be patient we hope you find this information helpful

About

Gastite Sizing App

This app simplifies calculating the required size of Gastite® CSST for gas installations. Input gas type, CSST length, and appliance power to instantly determine the correct size. It offers easy navigation, user-friendly design, and access to FAQs and installation guides.

Highlights
  • CSST sizing calculation
  • Natural gas or LPG selection
  • Access to FAQs
  • Downloadable installation guide
  • User-friendly design
  • Contact support
Features
Read full description

With the Gastite® Sizing APP it is easy to calculate the size of Gastite® CSST your next gas installation will require. Simply add basic information, including gas type, CSST length and appliance Max KW, and the app will instantly identify the size of Gastite® CSST the installation will require. Key features include: • Easy navigation • Intuitive, user-friendly design • Choose from natural gas or LPG depending on the installation • Access a range of frequently asked questions • Download the comprehensive Design & Installation Guide • Contact us Cost-effective and flexible, the Gastite® system has been designed to offer ease of installation and is suitable for both internal and external installation, including direct burial, according to manufacturer’s instructions. Supplied in one continuous, pre-marked by the metre, length, Gastite® CSST requires only simple hand tools and no hot works for successful installation. The Gastite® system should only be installed according to manufacturer’s instructions. Gas installation work should only be carried out by a business or self-employed operative who is a member of a class of persons approved by the Health & Safety Executive (HSE). The current registration body is the Gas Safe Register.

Screenshots

Gas Checker4 screens
Gastite Sizing App3 screens

Verdict

The call

The clearest difference is review sentiment: Gastite Sizing App at 100% against Gas Checker's 61%. On price, update cadence, ads and in-app purchases 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

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

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard1 real difference · 9 level
Gas Checker versus Gastite Sizing App: the parameters behind the verdict, then further details
ParameterGas CheckerGastite Sizing App
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews61.1% of reviews100.0% of reviews — better
Number of ratings1 — better—
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size234 MB15 MB
Age rating4+4+
DeveloperGasSoft limitedGastite Systems Limited

Customer experience

Gas Checker

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews54 reviews
Positive61.1%
Neutral7.4%
Negative31.5%

Gastite Sizing App

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

Bugs and requests

Gas Checker

Reported bugs

28 issues
  • Forgotten login details lock out users
  • Cannot open App on iPad with iOS 10.3
  • App crashes instead of opening
  • App crashes again after connecting to internet
  • Cannot get past 'add a profile picture' screen
Show 23 more
  • Cancel and close buttons do not work
  • Imported data lacks names and addresses
  • Faults since update, cannot use app
  • Incorrect dates on certificates
  • App is very slow since last update
  • Software saves multiple identical contacts
  • Desktop figures do not match app figures
  • Software regularly gets corrupted files
  • Saved contacts disappear from the app
  • App crashes frequently while filling out jobs
  • App freezes and becomes unresponsive
  • Searching by name crashes the app
  • PC main hub shows blank invoices with error.xero
  • Emailing quotes or receipts to customers does not send
  • App does not update each other's iPhone/iPad details
  • Reinstalling app loses history of certificates
  • App sometimes loses gas certificates
  • Software constantly has glitches
  • Last update ruined the app
  • Useful features have disappeared or don't work
  • Credit card payment facility only works with a specific company
  • UI is clunky and non-intuitive
  • The 'done' button in the top right appears to do nothing

Requested features

3 requests
  • New commercial forms
  • Stock control bolt-on
  • Improve breakdown repair paperwork length

Gastite Sizing App

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Gas Checker

No in-app purchases

None

Gastite Sizing App

No in-app purchases

Questions

Is Gas Checker free?
Gas Checker is free to download, with no in-app purchases.
Is Gastite Sizing App free?
Gastite Sizing App is free to download, with no in-app purchases.
Do Gas Checker or Gastite Sizing App have ads?
Neither Gas Checker nor Gastite Sizing App shows ads.
Which is updated more often, Gas Checker or Gastite Sizing App?
Gas Checker ships an update every 3 weeks, and Gastite Sizing App every 3 weeks. Most recently, Gas Checker was updated on November 1, 2026 and Gastite Sizing App on November 3, 2026.

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