Transformer Calculation Tool vs E
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Transformer Calculation Tool
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Easy Transformer Calculator is a practical and accurate tool designed for electricians, engineers, technicians, and students. Perform transformer calculations instantly with a clean and easy-to-use interface. Whether you're working with electrical systems, power distribution, or learning transformer theory, this app helps simplify complex calculations and improve accuracy. Key Features: ⢠Transformer voltage and current calculations ⢠Turns ratio and power estimation ⢠Supports electrical engineering formulas ⢠Fast, accurate, and easy-to-use interface ⢠Ideal for students, electricians, and professionals ⢠Useful for industrial and educational applications Save time, reduce calculation errors, and simplify transformer analysis with Easy Transformer Calculator. in-app purchase included Lifetime to Remove Ads Privacy Policy : https://docs.google.com/document/d/1A79qPsEUJu1rXjqsSUct_IBBAewiuBK5b8Dz-SPD0CY/edit?usp=sharing Terms & Condition : https://docs.google.com/document/d/1_yiolHxlRnOnEZk_sgPThQ0hggtlZAKCM6NvqDOE8Gs/edit?usp=sharing
E
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E-Light looks simple. It solves like an engineer. Learn electrical engineering by building real circuits. E-Light combines an interactive circuit simulator with professional electrical calculators into a single modern learning platform. At the heart of E-Light is a circuit simulator powered by a real Modified Nodal Analysis (MNA) physics engine. Place industrial electrical components onto the canvas, connect them terminal-to-terminal, press Run, and watch your circuit come alive with live voltage, current, and power calculations. ā THE SIMULATOR ā The heart of E-Light āø A real MNA physics engine solves the entire circuit on every change ā series, parallel, and three-phase. āø 125+ real industrial components: contactors, MCBs, RCDs, overload relays, VFDs, timers, 3-phase motors, sensors, CTs, energy meters, and more. āø Make it fail safely: overload a breaker, and it trips; drop a phase, and the relay reacts ā zero risk, zero smoke. āø Live readouts for voltage, current, power, and energy, like a real test bench. āø Practice motor-control wiring: start/stop, delay timers, and seal-in circuits. ā PROFESSIONAL ENGINEER-GRADE CALCULATORS ā When you need a fast, defensible answer, 20 are built in: ⢠Ohm's Law ⢠Power (1Φ / 3Φ) ⢠Voltage Drop ⢠Wire Size ⢠Motor FLC ⢠Breaker Sizing ⢠Short Circuit ⢠Ground Fault Loop ⢠Relay IDMT ⢠Power Factor Correction ⢠VFD Speed ⢠Earthing Conductor ⢠Busbar Sizing ⢠UPS Sizing ⢠Battery Backup ⢠Generator Sizing ⢠Generator Fuel ⢠Residential Load ⢠Lighting Design Built to recognized standards. With Pro, each calculator also reveals the equation behind the result, so you can check the formula, not just the number. ā BUILT FOR LEARNING ā Designed for engineers, technicians, educators, and students who want to learn, and instructors who want a safe, zero-equipment lab in the classroom. Practice and better understand electrical systems in a safe digital environment. ā FREE & PRO ā The simulator and all 20 calculators are free to use, with 10 components to try the canvas, local project saves, and occasional ads. E-Light Pro removes ads, reveals the formula behind every calculator, and unlocks the full 125+ component library plus cloud sync ā start a circuit on one device and continue on another. ā GROWING WITH EVERY UPDATE ā New simulator components, calculators, languages, and features continue to be added. ā WORKS ACROSS YOUR DEVICES ā Sign in once, and your projects sync across Mobile > Desktop > Tablet. Start a circuit on one device and continue on another. ā E-LIGHT PRO ā (auto-renewing subscription) Unlock the complete simulator component library, cloud sync, an ad-free experience, and calculator formulas. ⢠Available as Monthly, Quarterly, or Annual plans ⢠Prices are shown in the app and may vary by region ⢠Payment is charged to your Apple ID upon confirmation of purchase ⢠Renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period ⢠Your account will be charged for renewal within 24 hours prior to the end of the current period ⢠Manage or cancel anytime in your App Store account settings Terms of Use (EULA): https://elight.app/terms Privacy Policy: https://elight.app/privacy
Screenshots
Verdict
The clearest difference is ads: Transformer Calculation Tool at none against E's shown. Transformer Calculation Tool also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Transformer Calculation Tool sells 1 one-off in-app purchase and E sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Transformer Calculation Tool ships an update every 4 weeks, E every 3 weeks. The most recent releases landed on September 16, 2026 and September 29, 2026 respectively.
| Parameter | Transformer Calculation Tool | E |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 weeks | Every 3 weeks ā better |
| Ads | No ā better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac ā better |
| Requires iOS | 13.0 ā better | 15.0 |
| Further details ā not scored | ||
| Size | 57 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Shraddhaben Parmar | Mohamed Mubarak |
In-app purchases
Transformer Calculation Tool
- Lifetime premium$9.99
E
- Pro Monthly3 Days trial$2.991 Month
- Pro Quarterly3 Days trial$7.993 Months
- Pro Yearly3 Days trial$24.991 Year
Questions
Is Transformer Calculation Tool free?
Is E free?
Do Transformer Calculation Tool or E have ads?
Which is updated more often, Transformer Calculation Tool or E?
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