Calculators vs Electrical Engineering Toolkit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculators
This app offers a comprehensive suite of calculators for various fields including math, science, finance, and engineering. It supports multiple calculation formats and provides visual data representation through charts and graphs. Available on iPhone, iPad, and Apple Watch.
- Math and science calculations
- Conversions
- Engineering and construction tools
- Finance and investing calculators
- Real estate calculations
- Visual data graphing
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CALCULATE Whether math and science, conversions, engineering, construction, finance, investing or real estate, we got you covered. Works on iPhone, iPad and Apple Watch (simple calculator and tip calculator on Apple Watch). Perform calculations in either decimal, scientific, engineering, fraction or feet-inch format with functions that include powers, logs, trig and more. Sometimes a number isn't enough. Visually seeing data in the form of a function graph, bar chart or scatter plot enhances understanding like a result never could.
Electrical Engineering Toolkit
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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/
Screenshots
Verdict
The clearest difference is update cadence: Calculators at every 5 days against Electrical Engineering Toolkit's every 9 months. Calculators also leads on iOS requirement (8.2 vs 16.2). On price, ads, in-app purchases 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
Both are free to download. Calculators sells 1 one-off in-app purchase and Electrical Engineering Toolkit sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Calculators ships an update every 5 days, Electrical Engineering Toolkit every 9 months. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.
| Parameter | Calculators | Electrical Engineering Toolkit |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (11 ratings) — better | — |
| Positive reviews | 54.5% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 5 days — better | Every 9 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.2 — better | 16.2 |
| Further details — not scored | ||
| Size | 16 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Tech Box d.o.o. | Vladislav Zhirnov |
In-app purchases
Calculators
- PRO All-In-1$0.99
Electrical Engineering Toolkit
- Full version / monthly$0.991 Month
- Full version / year$3.991 Year
- Support project, remove ADS$5.99
Questions
Is Calculators free?
Is Electrical Engineering Toolkit free?
Do Calculators or Electrical Engineering Toolkit have ads?
Which is updated more often, Calculators or Electrical Engineering Toolkit?
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