Electronics Toolkit! vs Circuit Simulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Electronics Toolkit!
This app provides a comprehensive suite of tools and calculators for electronics engineers, students, and hobbyists. It includes numerous calculators for resistors, LEDs, capacitors, Ohm's law, and more, alongside useful tables and unit converters.
- Resistor color code calculators
- LED resistor calculator
- Ohm's law calculator
- Unit converter
- Logic gates truth tables
- 7-segment display simulator
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Electronics Toolkit is a helpful app with dozens of tools, calculators and references made for electronic engineers, students and hobbyists. Features: Calculators: • Resistor color codes - calculate the resistance of resistors by selecting the colors of the bands • SMD resistor codes - calculate the resistance of SMD resistors by entering the number • LED resistor calculator - calculate the needed resistance to connect en LED to a power source • Parallel resistors - calculate the resistance of resistors in parallel • Voltage divider - calculate the output voltage of a voltage divider • Series resistors - calculate the resistance of resistors in series • Ohm's law - calculate the voltage, current of resistance by entering the other two • Capacitance calculator - calculate the capacitance, voltage or charge by entering the other two • Battery discharge - calculate the time it takes to discharge a battery • Inductor color codes - calculate the inductance of inductors by selecting the colors of the bands • Parallel capacitors - calculate the capacitance of capacitors in parallel • Series capacitors - calculate the capacitance of capacitors in series • Unit converter - unit converter for length, temperature, area, volume, weight, time, angle, power and base • Op-amp calculator - calculate the output voltage of non-inverting, inverting, summing and differential opamps • Wheatstone bridge - calculate the resistance of one resistor in a balanced bridge or calculate the output voltage • Inductor codes - calculate the inductance of inductors by entering the number • Capacitor codes - calculate the capacitance of capacitors by entering the number • DAC and ADC calculator - calculate the output of digital-analog and analog-digital converters • Wavelength frequency calculator - calculate the frequency or wavelength of a wave • SI prefixes - convert numbers with SI prefixes • Capacitor energy - calculate the energy in a capacitor • Slew rate calculator - calculate the slew rate • Star delta transformation - calculate the resistors in a star delta transformation • Zener calculator - calculate the resistance of the resistor and voltage of the zener • Air core inductor calculator - calculate the inductance and wire length of an air-core inductor • 555 timer calculator - calculate the frequency, period, duty cycle, high time and low time of a popular 555 timer circuit • Plate capacitor calculator - calculate the capacity of a plate capacitor • Resistance to color code calculator - calculate the colors on the resistor by entering the resistance • LM317 - calculate the output voltage of an LM317 • Low pass filters • Wire resistance - calculate the resistance of an electrical wire • RMS voltage • Decibel calculator •Reactance Tables: • Logic gates - truth table of the 7 logic gates with interactive buttons • 7-segment display - an interactive display that you can change by clicking on one of the segments or by clicking on a button to show a hexadecimal character • ASCII - decimal, hexadecimal, binary, octal and char ASCII table • Resistivity - table with the resistivity of common metals at 293K • Arduino pinout • Pinout diagrams of 4000 and 7400 series ICs
Circuit Simulator
Design and simulate electronic and digital circuits in real-time. Visualize voltage and current flow, and analyze circuit behavior with tools like oscilloscopes and multimeters. Offers a user-friendly experience for circuit design and digital electronic analysis.
- Real-time electronic circuit simulation
- Digital circuit simulation
- Voltage and current analysis
- Multichannel oscilloscope
- Multimeter tools
- Circuit design and tuning
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VoltSim is a realtime electronic circuit simulator like Multisim, SPICE, LTspice, Altium or Proto for circuit design with a better user experience. VoltSim is a complete circuit app in which you can design circuits with various components and simulate an electric or digital circuit. During simulation you can check voltage, current and many other variables. Check signals on multichannel oscilloscope or multimeter and tune your circuit in real time! You can also use VoltSim as logic circuit simulator and perform digital electronic analysis! This app will help you visualize how the voltage varies across the circuit and how current flows through it. T&C: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Circuit Simulator at none against Electronics Toolkit!'s shown. Circuit Simulator also leads on review sentiment (73% vs 38%) and rating (4.7 vs 4.3). Electronics Toolkit!'s advantage is ratings volume (556 vs 72) and iOS requirement (11.0 vs 15.3). On price, update cadence, in-app purchases and monetization model 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. Electronics Toolkit! sells 1 one-off in-app purchase and Circuit Simulator sells 8 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Circuit Simulator holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Electronics Toolkit! has 556 ratings behind it against 72, so its average is the more settled of the two. Written reviews point the same way: 38% of Electronics Toolkit!'s written reviews are positive against 73% of Circuit Simulator's.
Electronics Toolkit! ships an update every 2 months, Circuit Simulator every 6 weeks. The most recent releases landed on September 18, 2026 and September 20, 2026 respectively.
| Parameter | Electronics Toolkit! | Circuit Simulator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (556 ratings) | 4.7 (72 ratings) — better |
| Positive reviews | 38.2% of reviews | 72.7% of reviews — better |
| Number of ratings | 556 — better | 72 |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.3 |
| Further details — not scored | ||
| Size | 23 MB | 103 MB |
| Age rating | 4+ | 4+ |
| Developer | Electronial | Sindhu Gopi |
Customer experience
Electronics Toolkit!
Circuit Simulator
Bugs and requests
Electronics Toolkit!
Reported bugs
10 issues- App crashes when entering values in calculation fields
- Keyboard doesn't appear or dismiss properly
- Pro version purchase not activating features
- App reverts to free version after purchase
- Calculation functions non-functional
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- Input fields partially visible or cut off
- App won't load on some devices
- Navigation issues (no back button to main menu)
- Unstable performance and frequent crashes
- Blurry or distorted text in some sections
Requested features
8 requests- Dark mode option
- Working calculator functionality with proper input fields
- Multi-language support (Turkish, Spanish, Hindi, etc.)
- Expanded IC pinout database
- More detailed background information and tutorials
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- Keyboard dismiss functionality
- Better translation quality
- Cross-device license sharing
Circuit Simulator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Electronics Toolkit!
- Pro version$2.99
Circuit Simulator
- Extensions Subscription$0.991 Month
- Sensors Extension$0.99
- Custom Chips Extension$1.99
- Instruments extension$2.99
Show 4 moreShow fewer
- Analog Extension$3.99
- Misc Extension$3.99
- Digital Extension$3.99
- Extension Pack$12.99
Questions
Is Electronics Toolkit! free?
Is Circuit Simulator free?
Which has better reviews, Electronics Toolkit! or Circuit Simulator?
Do Electronics Toolkit! or Circuit Simulator have ads?
Which is updated more often, Electronics Toolkit! or Circuit Simulator?
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