Comparison

Boiler Efficiency vs Flow Rate Help

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

Head to head
About

Boiler Efficiency

Perform preliminary audits on boiler efficiency and identify various losses in steam generation. Customize boiler applications, compare fuel grades, and analyze heat balance and flue gas for potential savings and improvements.

Highlights
  • Boiler efficiency audits
  • Loss identification
  • Customizable boiler applications
  • Fuel grade comparison
  • Heat balance sheet
  • Flue gas analysis
  • CHP (Brayton) cycle analysis
Features
Read full description

BoilerFE can run a quick preliminary audit on boiler efficiency and various losses associated in generation of pressurized steam. Users can create their specific boiler application including CHP (Brayton) cycle by editing default generic boiler and save it in a file for time to time performance review. Thus it would also enable users to compare different grade of fuels used in the same boiler under similar conditions. Therefore, this app can be very helpful to energy engineers and auditors in assessing the potential savings as well as to identify areas for improvement. App covers different types of boilers including CHP with option to select fuels such as coal, oil and gases with specific compositions. Following is the list of fuels under each category one can select from the picker. Each fuel has a default calorific value (HHV) based on certain composition. Users can edit this default value for accuracy. For fuels that are not in the list, users can create a custom fuel with composition and calorific value. Coal: Coal-Illinois, Coal-Pennsylvania, Coal-Ohio, Coal-W.VA, Coal- Kentucky, Coal, Custom. Fuel Oil: Furnace Oil#1, Furnace Oil#2, Furnace Oil#3, Furnace Oil#4, Furnace Oil#5, Furnace Oil#6, LSHS, Methanol, Ethanol, LPG, Kerosene, HSD, Custom. Gas: Methane, Ethane, Propane, Butane, Natural gas, Custom. By default, App uses a generic Coal fired in an industrial boiler that can be edited for more specific applications. The screen shots displays this example with results on heat balance sheet, flue gas analysis and stoichiometry. A brief description of the combustion model used in this app is also provided in App notes for reference. Type of boilers and inputs: App covers packaged, industrial and utility boilers with specific design data for efficiency and heat balance calculations. Users can conveniently choose the different unit standards for data input. Input such as airflow, fuel type and feed rate can be edited for more specific application using the respective editable tool bar buttons. There is a separate section on CHP (Brayton) cycle that is activated from Boiler info screen. All CHP data can be saved as well with unique titles and reloaded as and when required. Foot notes are provided to help edit different input parameters. Result: Besides computation of boiler efficiency using direct method, app provides the following results as shown in the screen shots. 1.Heat balance sheet 2.Flue gas analysis 3.Stoichiometric analysis of the combustion process. In this version, the app notes has the link for a complete documentation of implementation and validation of math-model used in individual apps. Also in addition this document includes guidelines to plan periodic maintenance activities required for a satisfactory performance of different energy intensive equipment such as boiler, pump, heat exchangers etc. commonly used in process industries.

About

Flow Rate Help

Calculate liquid flow rate, pipe diameter, or velocity with ease. Customize units for diameter, velocity, and flow rate, and set your preferred decimal places for precise results.

Highlights
  • Solve flow rate equations
  • Customizable diameter units
  • Customizable velocity units
  • Customizable flow rate units
  • Set decimal places
Features
Read full description

Quickly find flow rate, required pipe diameter or velocity of a liquid! Features Include: - Accurately solve flow rate equations - Set preferred diameter unit from: mm, cm, m, km, inches, feet, yards and miles - Set preferred velocity unit from: m/s, m/min, km/min, km/h, ft/s, ft/min, mi/min and mph - Set preferred flow rate unit from: m³/s, m³/min, m³/h, l/s, l/min, l/h, gps. gpm and gph - Select your preferred number of decimal places

Screenshots

Boiler Efficiency4 screens
Flow Rate Help3 screens

Verdict

The call

The clearest difference is price: Flow Rate Help at $0.99 against Boiler Efficiency's $5.99. Flow Rate Help also leads on device support (4 vs 2) and iOS requirement (11.0 vs 14.3). On review sentiment, 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

Boiler Efficiency costs $5.99 and Flow Rate Help $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Boiler Efficiency ships an update every 10 months, Flow Rate Help every 15 months. The most recent releases landed on September 16, 2026 and August 6, 2026 respectively.

Scorecard3 real differences · 7 level
Boiler Efficiency versus Flow Rate Help: the parameters behind the verdict, then further details
ParameterBoiler EfficiencyFlow Rate Help
Price$5.99$0.99 — better
Rating—4.3 (44 ratings) — better
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings—44 — better
Update frequencyEvery 10 months — betterEvery 15 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS14.311.0 — better
Further details — not scored
Size2 MB3 MB
Age rating4+4+
DeveloperKaup Shenoy AssociatesArmchair Engineering

Customer experience

Boiler Efficiency

Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Flow Rate Help

All ratings44 ratings
Positive86.4%
Neutral0.0%
Negative13.6%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Boiler Efficiency

No in-app purchases

None

Flow Rate Help

No in-app purchases

Questions

Is Boiler Efficiency free?
Boiler Efficiency costs $5.99, with no in-app purchases.
Is Flow Rate Help free?
Flow Rate Help costs $0.99, with no in-app purchases.
Do Boiler Efficiency or Flow Rate Help have ads?
Neither Boiler Efficiency nor Flow Rate Help shows ads.
Which is updated more often, Boiler Efficiency or Flow Rate Help?
Boiler Efficiency ships an update every 10 months, and Flow Rate Help every 15 months. Most recently, Boiler Efficiency was updated on September 16, 2026 and Flow Rate Help on August 6, 2026.

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