Comparison

Electrical Calculator lite vs Rehlko Power Plus

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

Rehlko Power Plus

Read full description

Rehlko PowerPlus helps authorized users monitor critical power assets from iPhone. View assigned sites, check generator and automatic transfer switch status, review active alarms, and stay informed about asset conditions from a mobile workflow designed for field and operations teams. The app provides access to site-level monitoring, asset dashboards, alert and alarm history, communication indicators, equipment details, contact information, and maintenance-related information. PowerPlus requires an active Rehlko PowerPlus account.

Screenshots

Electrical Calculator lite4 screens
Rehlko Power Plus3 screens

Verdict

The call

The clearest difference is in-app purchases: Rehlko Power Plus at none against Electrical Calculator lite's 2. Rehlko Power Plus also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (15.0 vs 17.6). On price, ads 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. Rehlko Power Plus asks for nothing beyond the download.

UpkeepUpdate frequency

Electrical Calculator lite ships an update every 2 months, Rehlko Power Plus every 2 weeks. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

Scorecard3 real differences · 7 level
Electrical Calculator lite versus Rehlko Power Plus: the parameters behind the verdict, then further details
ParameterElectrical Calculator liteRehlko Power Plus
PriceFreeFree
Rating4.6 (581 ratings) — better—
Positive reviews39.4% of reviews—
Number of ratings581 — better—
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.615.0 — better
Further details — not scored
Size18 MB49 MB
Age rating4+4+
DeveloperV PUGAZHENTHIDISCOVERY ENERGY, LLC

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

Rehlko Power Plus

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
None

Rehlko Power Plus

No in-app purchases

Questions

Is Electrical Calculator lite free?
Electrical Calculator lite is free to download, with in-app purchases available.
Is Rehlko Power Plus free?
Rehlko Power Plus is free to download, with no in-app purchases.
Do Electrical Calculator lite or Rehlko Power Plus have ads?
Neither Electrical Calculator lite nor Rehlko Power Plus shows ads.
Which is updated more often, Electrical Calculator lite or Rehlko Power Plus?
Electrical Calculator lite ships an update every 2 months, and Rehlko Power Plus every 2 weeks. Most recently, Electrical Calculator lite was updated on November 6, 2026 and Rehlko Power Plus on November 7, 2026.

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