HMI Draw, native HMI/SCADA development environment vs Electronic Circuit Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HMI Draw, native HMI/SCADA development environment
Create custom industrial monitoring and control interfaces on iOS devices. Design dynamic dashboards with various elements and connect them to PLC systems. Develop and test projects for free, with activation fees for deployment.
- Customizable page layouts
- Real-time monitoring and control
- Support for major PLC brands
- On-screen project editing
- Export/import project and asset files
- Cloud storage and deployment options
- Native PLC communication protocols
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HMI Draw is a *native* iOS application for creating Human Machine Interfaces for real time monitoring and control of industrial PLC based systems and processes. Data is presented in highly customizable page layouts much like a presentations app. Who's this for. The app is aimed at automation engineers or industrial machine manufacturers on many sectors including but not limited to building automation, industrial processing, power plants, water plants, industrial equipment, transportation and so on, who want to provide instant, reliable access to real time data right from iOS devices. What you'll get for the price of the app. HMI Draw allows you to create efficient, advanced, highly responsive "Human Machine Interfaces" right on your iPad screen with unprecedented ease of use and fun. The HMI Draw app is fully native and supports all major Programmable Logic Controller (PLC) brands. For the price of the app (FREE) you can *fully* develop and test projects of any complexity. No restrictions on number of pages, tags or PLCs are applied at this stage. You only pay for project activations when you are ready to deploy to end users. HMI Draw essential Features. - Very fast, launches and connects immediately regardless of project size. - All data types including Strings, Arrays and Dictionaries fully supported. - HMI Projects are edited on-screen as you run and monitor your process. - You can export and edit your project files as text on your PC or Mac. - Export/import asset files such as images, pdfs or audio files from HMI Draw to your PC or Mac. - Optional project storage in the cloud and easy deployment to end users devices. - Native PLC communication protocols. Connections are performed with no intermediate servers or boxes. - Major PLC brands supported, including: Allen Bradley, Mitsubishi, Omron, Opto 22, Schneider Electric, Siemens, Wago. - TCP/IP based security. Getting Started: creating a HMI Pad project. Projects are created like a mix of PowerPoint and Excel. The concept is quite simple. You lay out elements such as Sliders, Switches, Buttons, Images, Text Fields, Knobs, Trends, Gauges, Bar Indicators, Web browser, Array pickers, even Gesture Recognizers and much more onto pages. You connect on-screen objects with iPad sensors and PLC tags through simple links or powerful expressions. That's it !!. The result is a stunning, dynamic, real-time presentation of your PLC controlled process as you'd never imagined. Examples Ready for You. Explore the examples and take the liberty to make changes on them. Create your own test projects from scratch or based on the examples. HMI Draw will comprehensively tell you what inconsistencies or problems there may be in your project as you build them. New examples are being added on a regular basis or by user request. What's Next. There’s a lot more that we haven’t mentioned here, such as the page navigation interface, the embedded file server, the model browser, the model seeker, the automatic expression completer, the inspector viewer, alarm notifications, iPad sensors, bar code scanner, user access levels, password on launch, PLC validation codes, individual tag diagnostics, background processing, automatic network switching, and much much more. You surely will identify some of these features by just exploring the app, but the single source where everything is covered is the HMI Draw Reference Manual. Feel free to download it from our site and look at the full possibilities, you’ll love the product. Technical Support. We provide a free on-line support service based on public forums on our web site: http://www.sweetwilliamsl.com/support/forums Or through direct email: support@sweetwilliamsl.com. We also hold a public youTube channel at: http://www.youtube.com/hmipad. Feel free to direct your questions, suggestions or feedback to any of the above. We'll be happy to hear from you.
Electronic Circuit Calculator
This app provides a comprehensive suite of calculators and design tools for electronic engineering. It assists with circuit design, filter analysis, and component calculations for resistors, capacitors, and inductors. Ideal for both professionals and students, it simplifies complex electronic projects.
- Comprehensive calculator collection
- Filter design with graph plotting
- Resistor, transistor, capacitor design tools
- Amplifier and inductor design
- Circuit analysis and design
- Offline functionality
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Electronic Circuit Calculator is a powerful electronics toolkit combining circuit calculators, circuit analysis, design tools, and interactive simulations in one app. Built for electronics and electrical engineering students, hobbyists, technicians, and engineers, it helps you calculate, analyze, design, and explore electronic circuits. CIRCUIT ANALYSIS & THEORY • Thevenin Theorem • Norton Theorem • Kirchhoff’s Current Law (KCL) • Kirchhoff’s Voltage Law (KVL) • Nodal Analysis • Mesh Analysis • Ohm’s Law • Voltage Divider • Series and Parallel Circuits • RLC Resonance INTERACTIVE CIRCUIT SIMULATIONS Explore electronics with interactive simulations that help you understand circuit behavior. • Buck Converter Simulation • Boost Converter Simulation • Sawtooth Generator Circuit • AND, OR, NAND and NOR Gate Simulations • Shift Register Simulations • Multiplexer (MUX) • Demultiplexer (DEMUX) • Counter IC • PISO and SIPO Simulations POWER ELECTRONICS • Buck Converter Calculator • Boost Converter Calculator • Buck and Boost Simulations DIGITAL ELECTRONICS • Karnaugh Map • Decimal to Binary Converter • Logic Gate Simulations • Multiplexer and Demultiplexer • Counter IC • Shift Registers • PISO and SIPO OP AMP & ANALOG ELECTRONICS • Inverting Amplifier • Non-Inverting Amplifier • Differential Amplifier • Summing Amplifier • Integrator • Differentiator • Comparator • Schmitt Trigger TRANSISTOR, MOTOR & AMPLIFIER TOOLS • Transistor Amplifier Calculator • Transistor Design Tools • Motor Calculations • Stepper Motor Tools • Servo Motor Tools • Power Dissipation FILTER DESIGN • Sallen-Key Active Filters • Butterworth Filters • Chebyshev Filters • Bessel Filters • Band-Pass Filters • Band-Reject Filters • Crossover Filters Graphical visualization is available for supported filter calculations. RESISTOR, CAPACITOR & INDUCTOR TOOLS • Resistor Colour Code • SMD Resistor Code • Resistors in Series and Parallel • Resistor Ratio • LED Series Resistor • Star-Delta / Delta-Star Converter • Pi, Tee and Bridged-Tee Attenuators • Capacitors in Series and Parallel • Capacitor Charge • Capacitor Code • Capacitive Reactance • Inductive Reactance • Inductor Design OTHER ELECTRONICS TOOLS • 555 Timer — Astable and Monostable • Adjustable Voltage Regulator • PCB Trace Width Calculator • Microstrip Trace Width and Impedance • Skin Depth • Coaxial Cable Impedance • Power Calculator • Decibel Converter • Decibel to Watt and Watt to Decibel Electronic Circuit Calculator is useful for circuit analysis, circuit theory, electronic design, electrical calculations, digital electronics, power electronics, filter design, transistor calculations, op amp calculations, and electronics engineering study. Whether you are solving Thevenin, Norton, KCL, KVL, nodal or mesh problems, designing filters and amplifiers, or experimenting with digital ICs and converter simulations, the app brings your essential electronics tools together in one place. Calculate circuits. Analyze networks. Simulate electronics. Learn by interacting.
Screenshots
Verdict
The clearest difference is rating: Electronic Circuit Calculator at 4.0 against HMI Draw, native HMI/SCADA development environment's 3.0. Electronic Circuit Calculator also leads on monetization model (free vs free with in-app purchases). HMI Draw, native HMI/SCADA development environment's advantage is review sentiment (53% vs 14%) and ads (none vs shown). On price, ratings volume, update cadence and in-app purchases 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. HMI Draw, native HMI/SCADA development environment sells 3 one-off in-app purchases and Electronic Circuit Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Electronic Circuit Calculator holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 7 and 5 respectively. Written reviews complicate that: 53% of HMI Draw, native HMI/SCADA development environment's written reviews are positive against 14% of Electronic Circuit Calculator's, so the app with the better star average is not the one people write more warmly about.
HMI Draw, native HMI/SCADA development environment ships an update every 6 weeks, Electronic Circuit Calculator every 2 months. The most recent releases landed on June 11, 2026 and September 27, 2026 respectively.
| Parameter | HMI Draw, native HMI/SCADA development environment | Electronic Circuit Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (7 ratings) | 4.0 (5 ratings) — better |
| Positive reviews | 53.3% of reviews — better | 14.3% of reviews |
| Number of ratings | 7 — better | 5 |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 18 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | SweetWilliam, S.L. | Anas Abubakar |
Customer experience
HMI Draw, native HMI/SCADA development environment
Electronic Circuit Calculator
In-app purchases
HMI Draw, native HMI/SCADA development environment
- Activation for One Use$149.99
- Activation for Five Uses$449.99
- Activation for Ten Uses$799.99
Electronic Circuit Calculator
- Upgrade to the Pro version$2.99
Questions
Is HMI Draw, native HMI/SCADA development environment free?
Is Electronic Circuit Calculator free?
Which has better reviews, HMI Draw, native HMI/SCADA development environment or Electronic Circuit Calculator?
Do HMI Draw, native HMI/SCADA development environment or Electronic Circuit Calculator have ads?
Which is updated more often, HMI Draw, native HMI/SCADA development environment or Electronic Circuit Calculator?
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