Comparison

iCircuit vs DoE Toolkit

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

Head to head
About

iCircuit

Design and simulate analog and digital electronic circuits in real-time. This app offers a comprehensive component library, built-in test equipment, and the ability to create custom elements. It's ideal for learning, prototyping, and validating designs without physical components.

Highlights
  • Real-time circuit simulation
  • Extensive component library (300+)
  • Built-in test equipment (multimeter, oscilloscope)
  • Programmable Arduino and PIC microcontroller support
  • Custom element creation and sharing
  • Audio simulation
Features
Currently charting
Read full description

iCircuit is the premier iPhone and iPad app for designing, simulating, and learning analog and digital electronics. Its advanced simulation engine provides real-time, always-on analysis so your circuits stay powered and live, just like working with real components. Use it like a CAD tool: add components, wire them up, and set their properties. But iCircuit is unlike typical CAD apps because it is always simulating. You do not stop to take a measurement or spend time configuring reports. Instead, you just play with the circuit as you normally would, with the power on. Build circuits with over 300 components, from simple resistors and LEDs to programmable Arduinos (Uno, Nano, Mega, ESP8266, ESP32), Raspberry Pi Pico boards running real MicroPython and CircuitPython, PIC microcontrollers, and 60 4000/7400-series digital ICs (more available with Pro). Connect elements, adjust values, and instantly see the results. BUILT-IN TEST EQUIPMENT • Multimeter: Probe any point to read voltage, current, and power • Oscilloscope: Track multiple signals with touch-controlled time scale, stacked/unstacked views, FFT analysis, and Bode plots • Gauges: Visualize voltages, currents, and frequencies directly in your circuit • Signal generators and configurable sources EXTENSIVE COMPONENT LIBRARY • Raspberry Pi Pico and Pico 2 running genuine MicroPython and CircuitPython firmware • Programmable Arduinos (Uno, Nano, Mega, ESP8266, ESP32) • Programmable PIC microcontrollers (assembly and HEX files, more available with Pro) • Power: Voltage regulators (78xx, LM317), sources, dependent sources, power jacks, and simulated antennas • Analog: Resistors, capacitors, inductors, diodes, BJTs, MOSFETs, thermistors, triodes, and tetrodes • Digital: Logic gates (AND, OR, NAND, NOR, XOR), JK and D flip-flops, and 60 4000/7400-series ICs (180+ available with Pro) • ADCs and DACs • Sensors and displays: LEDs, 7-segment, NeoPixels, matrix displays, thermistors • Electromechanical: Motors, servos, SPST/SPDT and DPST/DPDT switches, push buttons, relays, and speakers SPICE, VERILOG, AND VHDL Import vendor SPICE models and subcircuits and use them as components. Write Verilog or VHDL in the HDL element and wire it to the rest of your circuit. CREATE CUSTOM ELEMENTS Build sub-circuits and custom elements to componentize your designs and create reusable modules. Share your custom elements with others via the iCircuit Gallery. AUDIO SIMULATION Hear your circuits. Speakers, buzzers, and microphones produce real audio output. Perfect for students learning electronics, hobbyists prototyping projects, and engineers validating designs, all without burning out a single component. ABOUT ICIRCUIT PRO (OPTIONAL) iCircuit is a complete app with a one-time purchase. iCircuit Pro is optional and adds extra components (including more PICs and a larger 4000/7400 IC library) and helps fund ongoing development. Pro is not required for core simulation or everyday circuit design. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

DoE Toolkit

Features
Read full description

The DoE Toolkit provides designer tools that allow you to generate classic experimental designs for the following methodologies: Screening: Full Factorial and Fractional Factorial Response Surface: Central Composite and Box-Behnken Mixture Orthogonal In addition, the DoE Toolkit includes an optimizer tool, which allows you to find an optimal subset of runs based on a design already generated using one of the designer tools. The DoE Toolkit allows you to augment any design by randomizing, replicating, and/or blocking. You can also add central points as well as axial points. You can control the way in which a generated design is displayed in the usual ways, by displaying factor levels as values or as factor level indices. Unique to the DoE Toolkit , you can also assign colors to factor levels and display a generated design using colors to represent factor levels. You can export any generated design to text (comma-separated value form), thereby making it easy to import your design into any spreadsheet or statistical analysis app.

Screenshots

iCircuit4 screens
DoE Toolkit4 screens

Verdict

The call

The clearest difference is in-app purchases: DoE Toolkit at none against iCircuit's 2. DoE Toolkit also leads on price ($9.99 vs $12.99). iCircuit's advantage is update cadence (every 4 weeks vs every 21 months) and chart position (#172 vs unranked). On ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

iCircuit costs $12.99 and DoE Toolkit $9.99 up front. iCircuit sells 2 in-app purchases, starting at $1.99 per month. DoE Toolkit asks for nothing beyond the download.

UpkeepUpdate frequency

iCircuit ships an update every 4 weeks, DoE Toolkit every 21 months. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

Scorecard4 real differences · 7 level
iCircuit versus DoE Toolkit: the parameters behind the verdict, then further details
ParameteriCircuitDoE Toolkit
Price$12.99$9.99 — better
Rating3.8 (135 ratings) — better—
Positive reviews61.1% of reviews—
Number of ratings135 — better—
Update frequencyEvery 4 weeks — betterEvery 21 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaid—
Best chart rank#172 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better14.5
Further details — not scored
Size179 MB13 MB
Age rating4+4+
DeveloperKrueger Systems, Inc.Kal-El Software

Bugs and requests

iCircuit

Reported bugs

4 issues
  • Oscilloscope and meter functions not working properly
  • Saving and loading circuits can be unreliable
  • Inconsistent behavior when rotating/flipping components
  • Crashes when working with larger or more complex circuits

Requested features

5 requests
  • More components (e.g. transformers, triodes, MOSFETs)
  • Ability to create custom components
  • Frequency domain analysis (Bode plots, FFT)
  • Improved wiring and component placement controls
  • Better support for AC circuits and motors

DoE Toolkit

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

iCircuit

Subscriptions2
  • iCircuit Pro (Monthly)$1.991 Month
  • iCircuit Pro (Yearly)$14.991 Year
None

DoE Toolkit

No in-app purchases

Questions

Is iCircuit free?
iCircuit costs $12.99, and also offers in-app purchases.
Is DoE Toolkit free?
DoE Toolkit costs $9.99, with no in-app purchases.
Do iCircuit or DoE Toolkit have ads?
Neither iCircuit nor DoE Toolkit shows ads.
Which is updated more often, iCircuit or DoE Toolkit?
iCircuit ships an update every 4 weeks, and DoE Toolkit every 21 months. Most recently, iCircuit was updated on October 15, 2026 and DoE Toolkit on October 9, 2026.

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