Comparison

Transformer Calculation Tool vs E

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

Head to head
About

Transformer Calculation Tool

Features
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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

About

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 ā–ø A real MNA physics engine solves the entire circuit on every change — series, parallel, and three-phase. ā–ø 125+ real industrial components: contactors, MCBs, RCDs, overload relays, VFDs, timers, 3-phase motors, sensors, CTs, energy meters, and more. ā–ø Make it fail safely: overload a breaker, and it trips; drop a phase, and the relay reacts — zero risk, zero smoke. ā–ø Live readouts for voltage, current, power, and energy, like a real test bench. ā–ø 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 — 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

Transformer Calculation Tool4 screens
E4 screens

Verdict

The call

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences Ā· 4 level
Transformer Calculation Tool versus E: the parameters behind the verdict, then further details
ParameterTransformer Calculation ToolE
PriceFreeFree
Update frequencyEvery 4 weeksEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS13.0 — better15.0
Further details — not scored
Size57 MB37 MB
Age rating4+4+
DeveloperShraddhaben ParmarMohamed Mubarak

In-app purchases

1 purchases

Transformer Calculation Tool

One-time1
  • Lifetime premium$9.99
3 purchases

E

Subscriptions3
  • 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?
Transformer Calculation Tool is free to download, with in-app purchases available.
Is E free?
E is free to download, with in-app purchases available.
Do Transformer Calculation Tool or E have ads?
E shows ads; Transformer Calculation Tool does not.
Which is updated more often, Transformer Calculation Tool or E?
Transformer Calculation Tool ships an update every 4 weeks, and E every 3 weeks. Most recently, Transformer Calculation Tool was updated on September 16, 2026 and E on September 29, 2026.

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