Gas Rate Calculator & Guide Downloads & RevenueGas Rate Calculator & Guide · App Store
Gas Rate Calculator & Guide is #35 in Productivity Paid in United Kingdom and charting in 1 of 30 countries we track.
Updated 9 Nov 2026 · rankings refresh through the day
DeveloperMr Combi Training
CategoryProductivity
Price4.99 GBP
Released
Rating★ 4.2 (14)
Version2.6
Age rating4+
First seen by us
24 Sep 2026
24 Sep 2026Installs (est.)500+ worldwide
Gas Rate Calculator & Guide update history & changes
Last change · 5 events since 21 Jan 2013Full timeline ↓📈New best rank in the overall chart: #151📈Entered the top 10🆕First spotted by AppInsider🆕Released on the App Store
Full timeline · 4 events in the last 12 months
- 📈Gas Rate Calculator & Guide new best rank in the overall chart: #151Top Paid · All Apps · GB
- 📈Gas Rate Calculator & Guide entered the top 10Top Paid · Productivity · GB
- 🆕Gas Rate Calculator & Guide first spotted by AppInsider#20 in Top Paid · Productivity · United Kingdom
- 🆕Gas Rate Calculator & Guide released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.2 ★
14 ratings
Measured
Best rank now
#35
Productivity PaidMeasured
Gas Rate Calculator & Guide on the App Store
App details
App ID
588849050
Publisher
Mr Combi Sales Ltd.
On the store since
Jan 2013
13 years on the store
Minimum OS
iOS 11.0+
iPhone 5s and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
1
EN
Size
2 MB
Also listed in
Utilities
Gas Rate Calculator & Guide downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where Gas Rate Calculator & Guide's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| United Kingdom | ProductivityPaid | #35 |
Apps near Gas Rate Calculator & Guide on the chart
Productivity Paid, around #35.
Ratings
App Store, worldwide.
Rating
4.2 ★
14 ratings
Measured
Ratings
14
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
4.2★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Productivity apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Gas Rate Calculator & Guide
This is the feature packed Gas Rate Calculator & Guide, from Mr Combi Training!
We've managed to cram all of this into one app....
• Metric and imperial gas rate calculators
• Save, email or export your results to other apps such as Dropbox, Google Drive or Evernote
• Built-in torch
• Tightness and let-by timer
• Conversion calculator
• Full gas rate guide
• Supports natural gas, butane and propane
• Save manual calorific values for improved accuracy
• Select between a 1 and 2 minute timer for metric meters
• Selectable timer alert
• Supports ¼ft³, ½ft³ 1ft³, 2ft³ and 5ft³ imperial test dials
A guide has been built into the app with 6 pages:
• Metric gas rate calculations
• Imperial gas rate calculations
• Heat input calculations
• Let-by test procedure
• Tightness test procedure
• Permissible drops on the tightness test
An extra Converter calculator is included in the app for simple conversions between gas rates and heat inputs. Simply select the type of gas, enter a value, select the units, press the 'Calculate' button and the calculator will show all gas rates (cubic metres per hour, cubic feet per hour and litres per second) and heat inputs (MJ/h, kW and BTUs per hour) based on the CV.
The Tightness Testing function allows you to quickly select between the let-by and tightness tests and has an easy to use timer. No longer do you need to fiddle about with your phone's timer!
Calorific values can be entered manually (and saved) for more accurate gas rate calculation results. The calorific value of natural gas in the UK varies from about 38.3 to 40.5 MJ per cubic metre; this can mean a difference in the gas rate calculation of more than 5%! With this calculator you can add the CV for your area in the settings page and avoid these inaccuracies. The default values set for butane and propane are both the same as supplied by Calor and BOC.
The metric timer can be set to either 1 or 2 minutes. For U6 and G4 meters one minute is sufficient, for E6 meters two minutes is recommended for accuracy. The timer can be set to an audible alert, vibrate, both or neither.
A torch function is included with this app if your device has an LED flash.
We've managed to cram all of this into one app....
• Metric and imperial gas rate calculators
• Save, email or export your results to other apps such as Dropbox, Google Drive or Evernote
• Built-in torch
• Tightness and let-by timer
• Conversion calculator
• Full gas rate guide
• Supports natural gas, butane and propane
• Save manual calorific values for improved accuracy
• Select between a 1 and 2 minute timer for metric meters
• Selectable timer alert
• Supports ¼ft³, ½ft³ 1ft³, 2ft³ and 5ft³ imperial test dials
A guide has been built into the app with 6 pages:
• Metric gas rate calculations
• Imperial gas rate calculations
• Heat input calculations
• Let-by test procedure
• Tightness test procedure
• Permissible drops on the tightness test
An extra Converter calculator is included in the app for simple conversions between gas rates and heat inputs. Simply select the type of gas, enter a value, select the units, press the 'Calculate' button and the calculator will show all gas rates (cubic metres per hour, cubic feet per hour and litres per second) and heat inputs (MJ/h, kW and BTUs per hour) based on the CV.
The Tightness Testing function allows you to quickly select between the let-by and tightness tests and has an easy to use timer. No longer do you need to fiddle about with your phone's timer!
Calorific values can be entered manually (and saved) for more accurate gas rate calculation results. The calorific value of natural gas in the UK varies from about 38.3 to 40.5 MJ per cubic metre; this can mean a difference in the gas rate calculation of more than 5%! With this calculator you can add the CV for your area in the settings page and avoid these inaccuracies. The default values set for butane and propane are both the same as supplied by Calor and BOC.
The metric timer can be set to either 1 or 2 minutes. For U6 and G4 meters one minute is sufficient, for E6 meters two minutes is recommended for accuracy. The timer can be set to an audible alert, vibrate, both or neither.
A torch function is included with this app if your device has an LED flash.
Latest updates
2.6
