# Electrical Engineering Toolkit — Electronics Circuit Calculator

> Electronics Circuit Calculator (iPhone/iPad app by Vladislav Zhirnov.)

- Source: https://appshunter.io/ios/app/electrical-engineering-toolkit/id6474202026 (this page in markdown: same URL + `.md`)
- Developer: [Vladislav Zhirnov](https://appshunter.io/developer/1476188065)
- Category: Utilities, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.2 · 12 MB
- Languages: Danish, Ukrainian, Russian, Croatian, Hungarian, Norwegian Bokmål, Hindi, Indonesian, Turkish, Hebrew and 22 more
- Released: 2023-12-15
- Data updated: 2026-08-18
- User reviews in markdown: https://appshunter.io/ios/app/electrical-engineering-toolkit/id6474202026/reviews.md

## What is Electrical Engineering Toolkit?

Design faster, check formulas instantly, and get confident answers—whether you’re wiring a prototype, laying out a PCB, or verifying lab results. This all-in-one toolkit brings together the most-used electronics calculators so you don’t have to jump between apps or spreadsheets.

Core Circuits & Passives
• Ohm’s Law (V, I, R, P)
• Resistor color code (through-hole & SMD)
• Series/parallel & voltage divider
• Capacitance & capacitor impedance (RC)
• Inductance/reactance/admittance; coil/loop inductance
• Battery life estimation
• RMS/peak/peak-to-peak voltage
• Decibel (dB) converters for power/voltage levels

Analog & RF Essentials
• Op-amp gain/voltage and inverting resistor calculators
• Impedance matching: π-match and T-match
• RF power: ratio/units conversion, PAE, N-way power divider
• dB/dBm helpers for quick link-budget math
These are the same families of tools engineers rely on for day-to-day analog and RF work. 
 
PCB & Signal Integrity (EDA)
• Microstrip/stripline impedance (single-ended & differential)
• Trace width and max current
• Crosstalk (edge/broadside), wire/microstrip inductance
These capabilities mirror what dedicated PCB toolkits and online impedance calculators provide—now in one place on your phone. 
 
Electromechanical & Power
• Lenz’s & Faraday’s laws (induced EMF)
• Torque conversion and stepper motor helpers
• Flyback SMPS building blocks
• Heat sink basics & power density
• Peak/peak-to-peak/RMS and power conversions
These bridge the gap between bench calculations and real hardware choices. 

Physics & Foundations
• Lorentz force, electrical energy, RC time constant, LC tank resonance—handy checks for labs and exams alike.

Why this app?
• Comprehensive: from Ohm’s Law and resistor codes to PCB impedance and RF power—covering the everyday set engineers actually use. 
• Built for speed: clean inputs, clear results, and units you expect.
• For everyone: students learning the basics, makers iterating quickly, and professionals verifying designs.

Perfect for: electronics labs, field service, ham/RF projects, PCB layout checks, audio/dB work, and rapid “sanity-check” calculations during reviews. 

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Full version / monthly | $0.99 | per month |
| Full version / year | $3.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Support project, remove ADS | $5.99 | one-time |



## Version history (last 4 releases)

### 4 — 2025-08-18

Added new sections with calculators: Analog, Connectors, EDA, Electromechanical, Optoelectronics, Passives, PCB,Power

### 3 — 2024-11-24

UI bugs fixed

### 2 — 2024-09-23

- Results saving added
- FAQ added

### 1.0 — 2023-12-15

No release notes.

## Apps similar to Electrical Engineering Toolkit

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| [TelecomsCalc](https://appshunter.io/ios/app/telecomscalc/id6566176373) | — | $0.99 | Utilities |
| [TC-RTD Reference](https://appshunter.io/ios/app/tc-rtd-reference/id6504454500) | 5.0 (1) | $1.99 | Utilities |
| [Ohm's Law Calculator](https://appshunter.io/ios/app/ohms-law-calculator/id1518919778) | 5.0 (2) | Free | Utilities |
| [Resistor Code Calculators](https://appshunter.io/ios/app/resistor-code-calculators/id1465336419) | — | Free | Utilities |
| [n Matrix Calculator](https://appshunter.io/ios/app/n-matrix-calculator/id6477749139) | — | $1.99 | Utilities |

## More apps by Vladislav Zhirnov

- [Facefitness - face exercise](https://appshunter.io/ios/app/facefitness-face-exercise/id1476188216)
- [Neon Bleep Test PRO](https://appshunter.io/ios/app/neon-bleep-test-pro/id1487695486)
- [Ideas fast log](https://appshunter.io/ios/app/ideas-fast-log/id1491519557)
- [Concentrate and guess color](https://appshunter.io/ios/app/concentrate-and-guess-color/id1491661397)
- [Postage stamps: all countries](https://appshunter.io/ios/app/postage-stamps-all-countries/id1497958107)
- [Road signs: all countries](https://appshunter.io/ios/app/road-signs-all-countries/id1500810663)

All apps by Vladislav Zhirnov: https://appshunter.io/developer/1476188065

## Related topics

[electrical engineering toolkit](https://appshunter.io/ios/topics/electrical-engineering-toolkit) · [voltage divider calculator](https://appshunter.io/ios/topics/voltage-divider-calculator) · [electrical tool kit](https://appshunter.io/ios/topics/electrical-tool-kit) · [electronics reference toolkit](https://appshunter.io/ios/topics/electronics-reference-toolkit)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*