E-Light: Circuit Simulator
Build. Simulate. Calculate.
Free · In‑App Purchases
Looks simple, solves like an engineer. Build a real panel, hit Run, and a real physics engine takes over — breakers trip, motors spin. Plus 20 engineer-grade calculators.
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.
◆ THE SIMULATOR ◆
The heart of E-Light
▸ A real MNA physics engine solves the entire circuit on every change — series, parallel, and three-phase.
▸ 125+ real industrial components: contactors, MCBs, RCDs, overload relays, VFDs, timers, 3-phase motors, sensors, CTs, energy meters, and more.
▸ Make it fail safely: overload a breaker, and it trips; drop a phase, and the relay reacts — zero risk, zero smoke.
▸ Live readouts for voltage, current, power, and energy, like a real test bench.
▸ Practice motor-control wiring: start/stop, delay timers, and seal-in circuits.
◆ PROFESSIONAL ENGINEER-GRADE CALCULATORS ◆
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.
◆ BUILT FOR LEARNING ◆
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.
◆ FREE & PRO ◆
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.
◆ GROWING WITH EVERY UPDATE ◆
New simulator components, calculators, languages, and features continue to be added.
◆ WORKS ACROSS YOUR DEVICES ◆
Sign in once, and your projects sync across Mobile > Desktop > Tablet. Start a circuit on one device and continue on another.
◆ E-LIGHT PRO ◆
(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
Ratings & Reviews
* Fixed unexpected sign-outs after the app has been closed for an extended period.
* Added kVA and kW load options to the Wire Size and Voltage Drop Calculators.
* Fixed three-phase calculation results in the Wire Size Calculator.
* Improved overall app stability and calculation accuracy.
The developer, Mohamed Mubarak, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Location
- Contact Info
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mohamed Mubarak
- Size
- 38.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 10.15 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Pro Monthly $2.99
- Pro Yearly $24.99
- Pro Quarterly $7.99
- Copyright
- © 2026 E-Light