Comparison

HMI Draw, native HMI/SCADA development environment vs Electronics Engineer Helper

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

Electronics Engineer Helper

This app provides a comprehensive suite of calculators and reference tools for electronics enthusiasts and professionals. It includes features for component identification, circuit calculations, and electrical property analysis, aiding in both study and practical work.

Highlights
  • Datasheet search
  • Resistor color code calculator
  • Electronic schematic symbols
  • Pinouts guide
  • Ohm's law calculator
  • AWG converter
  • Unit converter
Features
Read full description

Digital toolbox for electronics engineers and electricians. Calculators and references for beginners and professionals — for work, study, DIY, and repair. Used by over 100,000 users. Completely ad-free. Included tools: • Datasheet search • Equivalent parts search (cross reference for transistors, diodes and ICs) • Resistor color and digit marking (4, 5 and 6 band color code; 2 symbols, 3/4 digit and EIA-96 code SMD resistors code) • Electronic schematic symbols (IEC 60617, IEEE 315 and GOST standards) • Pinouts of connectors and interfaces (USB, HDMI, DisplayPort, DVI, VGA, Thunderbolt, Apple Lightning and 30-pin, SATA, PCI Express and M.2, Ethernet RJ45 with PoE, RJ11/RJ14/RJ25, RS-232/422/485, IEEE 1394 FireWire, ATX, computer fans, SD card, audio jack, RCA, MIDI, XLR, PS/2, D-sub, SMEMA) • Pinouts of boards and microcontrollers (Raspberry Pi and Pico, Arduino, ESP32, ESP8266, STM32 Nucleo, Teensy, Orange Pi, RADXA Rock Pi, LubanCat, Flipper Zero, ATmega and ATtiny) • Ohm's law calculator • AWG converter (wire diameter, cross-section area, resistance and maximum current) • Resistor for LED • Voltage divider • Wheatstone bridge (output voltage or unknown resistance, current and power of every arm) • Capacitor code • Capacitor markings • Capacitor ESR tables • Frequency response curve calculation of passive filters (RC, RL, RLC, LC) • Inductor color code • Air-core coil calculator (inductance or number of turns of a single-layer solenoid) • Ideal transformer (winding turns, voltages and currents) • Linear current regulator • SMD packages list • Reactance • PCB trace resistance • Active, apparent and reactive power • RMS converter (peak, RMS and peak-to-peak values for seven waveform shapes) • 555 waveform generator • Operational amplifiers • RLC circuit • Number conversion • Unit converter • Cable voltage drop • Battery life (runtime of a battery pack, with discharge curve) • NTC thermistor resistance • Logic gates • RC circuit • Decibels calculator • 25-pair cable color code • Fuse color marking Additionally, by purchasing the PRO version of the app, you will get access to additional tools: • SMD components marking codes • Diodes color code (Pro Electron, JEDEC and JIS-C-7012 standards) • Linear voltage regulator • Resistor value to color or SMD code marking converter • Voltage rectifier • Series or parallel electrical components' connection calculator • Diode voltage drop • Minimum PCB trace width • Analog to digital conversion • Attenuators • 4-20 mA signal converter • Thermocouple calculator • Resistance thermometer • Buck switching voltage regulator • Wire resistance • Zener diode regulator (Zener diode and series resistor selection from a catalogue of 438 parts) • Load cell (bridge output voltage to weight, force, pressure or torque) • BJT voltage divider biasing • Transformer turns per volt (from core area, flux density and frequency) • Junction temperature (with or without a heatsink, power derating curve) • Solar string dimensioning (minimum voltage and current ratings for a PV array) • Solar cable and fuse selection (NEC and IEC rules) • 555 astable generator with variable duty cycle • NTC thermistor in a voltage divider and with an ADC input Privacy Policy: https://www.eehelper.app/ios/privacy/ Terms of Use: https://www.eehelper.app/ios/terms/

Screenshots

HMI Draw, native HMI/SCADA development environment3 screens
Electronics Engineer Helper4 screens

Verdict

The call

The clearest difference is review sentiment: Electronics Engineer Helper at 98% against HMI Draw, native HMI/SCADA development environment's 53%. Electronics Engineer Helper also leads on rating (4.8 vs 3.0) and ratings volume (436 vs 7). HMI Draw, native HMI/SCADA development environment's advantage is iOS requirement (8.0 vs 17.0). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. HMI Draw, native HMI/SCADA development environment sells 3 one-off in-app purchases and Electronics Engineer Helper sells 2 in-app purchases, starting at $4.89 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Electronics Engineer Helper holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Electronics Engineer Helper has 436 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 53% of HMI Draw, native HMI/SCADA development environment's written reviews are positive against 98% of Electronics Engineer Helper's.

UpkeepUpdate frequency

HMI Draw, native HMI/SCADA development environment ships an update every 6 weeks, Electronics Engineer Helper monthly. The most recent releases landed on June 11, 2026 and September 18, 2026 respectively.

Scorecard4 real differences · 6 level
HMI Draw, native HMI/SCADA development environment versus Electronics Engineer Helper: the parameters behind the verdict, then further details
ParameterHMI Draw, native HMI/SCADA development environmentElectronics Engineer Helper
PriceFreeFree
Rating3.0 (7 ratings)4.8 (436 ratings) — better
Positive reviews53.3% of reviews97.7% of reviews — better
Number of ratings7436 — better
Update frequencyEvery 6 weeksMonthly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS8.0 — better17.0
Further details — not scored
Size18 MB91 MB
Age rating4+12+
DeveloperSweetWilliam, S.L.Rostyslav Dovhaliuk

Customer experience

HMI Draw, native HMI/SCADA development environment

All ratings7 ratings
Positive42.9%
Neutral14.3%
Negative42.9%
Written reviews15 reviews
Positive53.3%
Neutral6.7%
Negative40.0%

Electronics Engineer Helper

All ratings436 ratings
Positive97.5%
Neutral1.6%
Negative0.9%
Written reviews172 reviews
Positive97.7%
Neutral0.6%
Negative1.7%

Bugs and requests

HMI Draw, native HMI/SCADA development environment

Not enough reviews yet to summarise bugs or requests.

Electronics Engineer Helper

Reported bugs

2 issues
  • Incorrect resistor color code display for some values
  • In-app purchase option not working for some users

Requested features

5 requests
  • Add more circuit schematics and examples
  • Include ASCII code to decimal, hex, and octal conversion
  • Expand the pinout section with more details
  • Add active filter (RC, RL, RLC, LC) calculators
  • Include digital to analog converter, transistor, and transformer calculators

In-app purchases

3 purchases

HMI Draw, native HMI/SCADA development environment

One-time3
  • Activation for One Use$149.99
  • Activation for Five Uses$449.99
  • Activation for Ten Uses$799.99
2 purchases

Electronics Engineer Helper

Subscriptions1
  • 1 Year Subscription1 Month trial$4.891 Year
One-time1
  • Lifetime PRO Version$12.49

Questions

Is HMI Draw, native HMI/SCADA development environment free?
HMI Draw, native HMI/SCADA development environment is free to download, with in-app purchases available.
Is Electronics Engineer Helper free?
Electronics Engineer Helper is free to download, with in-app purchases available.
Which has better reviews, HMI Draw, native HMI/SCADA development environment or Electronics Engineer Helper?
Electronics Engineer Helper is rated higher. HMI Draw, native HMI/SCADA development environment averages 3.0 out of 5 from 7 ratings, while Electronics Engineer Helper averages 4.8 from 436 ratings.
Do HMI Draw, native HMI/SCADA development environment or Electronics Engineer Helper have ads?
Neither HMI Draw, native HMI/SCADA development environment nor Electronics Engineer Helper shows ads.
Which is updated more often, HMI Draw, native HMI/SCADA development environment or Electronics Engineer Helper?
HMI Draw, native HMI/SCADA development environment ships an update every 6 weeks, and Electronics Engineer Helper monthly. Most recently, HMI Draw, native HMI/SCADA development environment was updated on June 11, 2026 and Electronics Engineer Helper on September 18, 2026.

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