Comparison

Electrical Calculator lite vs Steam Pad

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

Head to head
About

Electrical Calculator lite

This comprehensive tool offers over 60 calculators and 16 converters for electrical engineering, wiring, and circuit analysis. It supports engineers, electricians, students, and hobbyists with calculations ranging from basic Ohm's Law to complex RLC circuits and power conversions.

Highlights
  • 60+ Electrical Calculators
  • 16 Electrical Unit Converters
  • Ohm's Law Calculations
  • RLC Circuit Analysis
  • Power and Current Calculations
  • Transformer Calculations
  • Wire Size Selector
Features
Read full description

Trusted by over 15,000 users worldwide, the Electrical Calculator App is your all-in-one solution for electrical engineering, wiring, and circuit analysis. Designed for engineers, electricians, students, and hobbyists, this app offers a wide range of calculators to handle everything from basic Ohm’s Law to complex impedance and RLC circuits. Available Calculations: Basic Electrical Calculators: • Resistor Color Code (Ω) • Voltage Calculator (Ω) • Current Calculator (Ω) • Resistance Calculator (Ω) • Power Calculator (Ω) • Voltage Drop Calculations • Wire Size Selector Impedance Calculations (R-L-C): • Impedance Calculators R-L-C • R and L in Series • R and L in Parallel • R and C in Series • R and C in Parallel • L and C in Series • L and C in Parallel • R, L and C in Series • R, L and C in Parallel Power and Current Calculators: • Single Phase Power • Three Phase Power • Single Phase Current • Three Phase Current • kVA to Amps (Single Phase) • kVA to Amps (Three Phase) • Amps to kVA (Single Phase) • Amps to kVA (Three Phase) Transformer Calculations: • Transformer Calculator (Current) • Transformer Calculator (Voltage) Horsepower and Current (HP): • DC Horsepower • Single Phase Horsepower • Three Phase Horsepower • DC Current (HP) • Single Phase Current (HP) • Three Phase Current (HP) Efficiency and Power Factor: • Efficiency (DC) • Efficiency (Single Phase) • Efficiency (Three Phase) • Power Factor (Single Phase) • Power Factor (Three Phase) Lighting Calculations: • Luminous Intensity (Light Calculation) • Luminous Flux (Light Calculation) • Solid Angle (Light Calculation) Energy Storage and Cost Calculations: • Energy Cost Calculation • Energy Storage (Resistance) • Energy Storage (Inductance) • Energy Storage (Capacitance) Star-Delta Conversion: • Star to Delta Conversion • Delta to Star Conversion Reactance and Frequency Calculators: • Inductive Reactance • Capacitive Reactance • Resonant Frequency • Inductor Sizing Equation • Capacitor Sizing Equation Series and Parallel Calculations: • Resistance (Series) • Resistance (Parallel) • Inductance (Series) • Inductance (Parallel) • Capacitance (Series) • Capacitance (Parallel) • Unknown Resistance (Series) • Unknown Resistance (Parallel) • Unknown Capacitance (Series) • Unknown Capacitance (Parallel) Other Tools: • DC Generator Electrical Unit Converters: • Electrical Converter • Field Strength • Electrical Potential • Resistance • Resistivity • Conductance • Conductivity • Capacitance • Inductance • Charge • Linear Charge Density • Surface Charge Density • Volume Charge Density • Current • Linear Current Density • Surface Current Density • Power Whether you’re troubleshooting, designing, learning, or estimating, the Electrical Calculator App provides accurate, real-time results to support your electrical work. Download now and enhance your productivity with the most complete electrical calculator toolkit on the App Store.

About

Steam Pad

This app calculates thermodynamic and transport properties of water and steam using IAPWS standards. It allows users to input any two basic parameters to derive others, visualize results on various charts, and compute additional properties. It supports both SI and I-P unit systems for engineering and educational purposes.

Highlights
  • Calculate properties from any two basic parameters
  • Generate T-S, H-S, P-H, T-H charts
  • Compute additional thermodynamic and transport parameters
  • Save and restore calculation results
  • Supports SI and I-P unit systems
  • Interactive chart manipulation (pan, zoom)
Features
Read full description

1. Introduction Steam Pad calculates the thermodynamic and transport properties of water and steam, using the latest releases of IAPWS. It has some distinctive features, and is applicable for industrial, engineering, and teaching processes: − Uses any selected 2 basic parameters to calculate others. − Provides T-S, H-S, P-H, T-H charts, and locates results (point locations) on them. − Computes additional thermodynamic and transport parameters. − Allows saving the results, and supports restoring one of them. 2. Calculator 2.1 Inputs and outputs By given any selected 2 parameters as the inputs from the Basics (Pressure, Temperature, Enthalpy, Entropy, Specific volume, Vapour Fraction), this App calculates other 4 parameters, and calculates some other thermodynamic and transport parameters. The inputs and outputs of the basics can alternate, which fulfills alterable calculating demands. 2.2 The range of validity The range of validity defined by pressure and temperature for general properties is the same to the definition in the release of IAPWS IF97. 2.3 Single-Phase regions and Two-Phase region The calculating demands are handled coordinately both for the Single-Phase regions and the Two-Phase region. The calculated properties and the corresponding region of the results can be distinguished from inputs automatically, and will be displayed in the outputs list box. For example, the saturation properties can be derived from the given P (less than 22.06395Mpa) and X (0.0-1.0). 2.4 Other properties The optional parameters are calculated based on the releases of IAPWS, or on the physical models, which include: − u: Specific internal energy − Specific isobaric heat capacity − Specific isochoric heat capacity − Speed of sound − Dynamic viscosity − Kinematic viscosity − Thermal conductivity − Entropy index − Static Dielectric Constant − Prandtl number 2.5 Units The parameters are shown in SI(metric) or in I-P(English) system of units, which can be reset in the Outputs Setting function of the app. 3. Charts 3.1 Chart types Typical thermodynamic charts are embedded in this app, and displayed as vector-graphs. Only regions 1 to 4 are shown in the charts, and region 5 is ignored for the applicative concern. The gradual changes (the lines) of the other 4 parameters along with the X and Y ordinates, are shown in the charts. There are 4 charts available: − T-S Chart − H-S Chart − P-H Chart − T-H Chart 3.2 Charts display − The lines of other 4 parameters are displayed in different colors. − Lines are displayed or hidden by checking the checkboxes. − The charts can be moved, enlarged or contracted by dragging or pinching gestures of fingers. − The corresponding values are attached along with the lines at certain intervals. − The boundary of the saturation region, and the critical point, are especially identified. 3.3 Calculated results The calculated results will be located in the charts as an identifying point (or points) with the corresponding ordinates. 4. Results The calculated records, each of which contains 6 basic parameters, can be stored in a row in the list of the Results panel by clicking the Save button on the Calculator panel. − The 2 inputs of one record are displayed in a distinctive color. − The region of each result, as well as the possible arrangement number of multiple outputs, is shown on the top of the row. − The records can be re-arranged and be deleted. − The selected record can be restored both on the Calculator panel and on the Charts panel, by clicking the Restore button.

Screenshots

Electrical Calculator lite4 screens
Steam Pad4 screens

Verdict

The call

The clearest difference is rating: Electrical Calculator lite at 4.6 against Steam Pad's 3.7. Electrical Calculator lite also leads on ratings volume (580 vs 3). Steam Pad's advantage is update cadence (every 9 days vs every 2 months) and review sentiment (67% vs 39%). On price, ads, in-app purchases 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

Both are free to download. Electrical Calculator lite sells 2 one-off in-app purchases and Steam Pad sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Electrical Calculator lite holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: Electrical Calculator lite has 580 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 39% of Electrical Calculator lite's written reviews are positive against 67% of Steam Pad's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Electrical Calculator lite ships an update every 2 months, Steam Pad every 9 days. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard6 real differences · 4 level
Electrical Calculator lite versus Steam Pad: the parameters behind the verdict, then further details
ParameterElectrical Calculator liteSteam Pad
PriceFreeFree
Rating4.6 (580 ratings) — better3.7 (3 ratings)
Positive reviews39.4% of reviews66.7% of reviews — better
Number of ratings580 — better3
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Mac — betteriPhone, iPod
Requires iOS17.69.0 — better
Further details — not scored
Size18 MB5 MB
Age rating4+4+
DeveloperV PUGAZHENTHI晓东 翟

Customer experience

Electrical Calculator lite

All ratings578 ratings
Positive90.0%
Neutral4.5%
Negative5.5%
Written reviews33 reviews
Positive39.4%
Neutral6.1%
Negative54.5%

Steam Pad

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Bugs and requests

Electrical Calculator lite

Reported bugs

2 issues
  • Unlock option doesn’t work
  • Voltage drop calculator is incorrect compared to other apps

Requested features

3 requests
  • Output vs frequency sweep plotting for resonance points or impedance graphs for RL and RC circuits
  • Add MHz option for capacitive and inductive reactance calculators
  • Add MHz option for resonance frequency calculator

Steam Pad

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Electrical Calculator lite

One-time2
  • 16 Electrical Converters$0.99
  • Electrical Calculators$3.99
1 purchases

Steam Pad

One-time1
  • Full Functions$3.99

Questions

Is Electrical Calculator lite free?
Electrical Calculator lite is free to download, with in-app purchases available.
Is Steam Pad free?
Steam Pad is free to download, with in-app purchases available.
Which has better reviews, Electrical Calculator lite or Steam Pad?
Electrical Calculator lite is rated higher. Electrical Calculator lite averages 4.6 out of 5 from 580 ratings, while Steam Pad averages 3.7 from 3 ratings.
Do Electrical Calculator lite or Steam Pad have ads?
Neither Electrical Calculator lite nor Steam Pad shows ads.
Which is updated more often, Electrical Calculator lite or Steam Pad?
Electrical Calculator lite ships an update every 2 months, and Steam Pad every 9 days. Most recently, Electrical Calculator lite was updated on November 1, 2026 and Steam Pad on November 2, 2026.

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