Electrical Calculator lite vs Box Fill 2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 60+ Electrical Calculators
- 16 Electrical Unit Converters
- Ohm's Law Calculations
- RLC Circuit Analysis
- Power and Current Calculations
- Transformer Calculations
- Wire Size Selector
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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.
Box Fill 2
This utility app helps electricians and contractors perform precise electrical box fill calculations according to the latest codes. It also includes a comprehensive construction calculator for dimensional math, area, volume, and right-angle solutions.
- Electrical box fill calculations
- Construction calculator
- Dimensional math (feet-inches-fractions, metric)
- Area and volume calculations
- Right-angle solutions
- Shareable calculation reports
- iCloud sync across devices
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Box Fill 2: Electrical & Construction Calculator Stop guessing and start calculating with confidence. Box Fill 2 is the ultimate pro-grade utility for electricians, contractors, and engineers. Designed to streamline your workflow from the office to the job site, it combines a precision electrical box fill calculator with a full-featured construction calculator in one powerful, intuitive interface. EXPERT ELECTRICAL CALCULATIONS Stay compliant and safe with box fill calculations based on the latest standards, including the 2024 Canadian Electrical Code (CEC) and the 2023 National Electrical Code (NEC). Complete Fill Schedules: Create and save an unlimited list of calculations for entire projects. Advanced Device Logic: Automatically handles standard devices and "bulky" equipment (like smart dimmers or GFCIs) using the specific depth-based volume math required by the CEC. Detailed Conductor Tracking: Easily account for insulated conductors, bare grounds (with the NEC "4-ground" rule), internal clamps, and wire nuts. Custom Box Support: Use standard trade sizes or enter custom dimensions for specialized enclosures. Share & Export: Print directly from the app or share professional calculation reports via email or messaging to inspectors and team members. FULL CONSTRUCTION CALCULATOR No more switching between apps. Box Fill 2 includes a robust construction math engine designed for the trades. Dimensional Math: Work directly in feet-inches-fractions or metric units with seamless conversions. Area & Volume: Quickly solve for square footage and cubic volume for materials like concrete, drywall, and paint. Right-Angle Solutions: Instantly calculate rafters, slopes, and square-ups for precise layouts. History & Memory: Access previous calculations and save frequently used values to save time on repetitive tasks. MODERN & PROFESSIONAL FEATURES Universal Compatibility: Buy once and use on your iPhone, iPad, and Mac. iCloud Sync: Your project data stays up-to-date across all your devices automatically. Dark Mode Support: Optimized for high visibility in low-light job site conditions. Clean Interface: Ad-free, professional UI designed for speed and clarity under pressure. Put your pencil down and upgrade your toolkit. Download Box Fill 2 today.
Screenshots
Verdict
The clearest difference is price: Electrical Calculator lite at Free against Box Fill 2's $3.99. Electrical Calculator lite also leads on rating (4.6 vs 3.3) and ratings volume (578 vs 3). Box Fill 2's advantage is in-app purchases (none vs 2) and update cadence (every 5 weeks vs every 2 months). On review sentiment, 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
Electrical Calculator lite is free to download; Box Fill 2 costs $3.99 up front. Electrical Calculator lite sells 2 one-off in-app purchases. Box Fill 2 asks for nothing beyond the download.
Electrical Calculator lite holds the better App Store score, 4.6 against 3.3. That said, the two scores are not equally well evidenced: Electrical Calculator lite has 578 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 39% of Electrical Calculator lite's written reviews are positive against 33% of Box Fill 2's.
Electrical Calculator lite ships an update every 2 months, Box Fill 2 every 5 weeks. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.
| Parameter | Electrical Calculator lite | Box Fill 2 |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 4.6 (578 ratings) — better | 3.3 (3 ratings) |
| Positive reviews | 39.4% of reviews — better | 33.3% of reviews |
| Number of ratings | 578 — better | 3 |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 17.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 18 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | V PUGAZHENTHI | Snappy Appz Inc. |
Customer experience
Electrical Calculator lite
Box Fill 2
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
Box Fill 2
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Electrical Calculator lite
- 16 Electrical Converters$0.99
- Electrical Calculators$3.99
Box Fill 2
No in-app purchases
Questions
Is Electrical Calculator lite free?
Is Box Fill 2 free?
Which has better reviews, Electrical Calculator lite or Box Fill 2?
Do Electrical Calculator lite or Box Fill 2 have ads?
Which is updated more often, Electrical Calculator lite or Box Fill 2?
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