Comparison

Simplex Nodal vs English Electrical Engineering

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

Head to head
About

Simplex Nodal

Explore electricity markets by building and solving your own models. This app visually demonstrates complex concepts like locational marginal pricing, line losses, and the simplex algorithm. Learn through interactive examples and detailed step-by-step operations.

Highlights
  • Build and solve electricity market models
  • Visualize simplex algorithm workings
  • Explore locational marginal pricing
  • Understand line losses and binding constraints
  • Step-by-step simplex iteration details
  • Export simplex tableaux as CSV
  • Includes sample market models
Read full description

In conjunction with the tutorial document, available at www.simplexnodal.com, use the app to learn about electricity markets by graphically building and solving your own electricity market models. The tutorial also describes the simplex algorithm that solves the model and the app lets you see the internal workings of the algorithm. Demonstrates nodal electricity markets features such as: locational marginal pricing, line losses, parallel flows, binding constraints, price separation, the spring washer effect, negative prices, risk and reserves, ramp-rates, congestion charges, transmission rentals, multiple electrical islands, HVDC branches, HVDC risk, HVDC risk subtractor, HVDC reserve sharing, and more. See www.simplexnodal.com for more screenshots and the tutorial document. Highlights: • The tutorial explains nodal electricity markets and the simplex algorithm via worked examples using the app • Start with small models to learn the basic concepts of the electricity market model the simplex algorithm • Learn how to explain prices by relaxing constraints to determine shadow prices • Enable/disable electricity market features to focus on individual effects, e.g., risk and reserve is easier to explain with line losses disabled • View full details of the simplex modelling including basic and non-basic variables, constraints, shadow prices, and details of the simplex iterations • Learn how the simplex algorithm works by viewing the step by step simplex operations that solve the electricity market model. View iteration details in the app and/or export the simplex tableaux as a csv file • The app implements its own simplex algorithm but you can also export the model in GAMS format to solve externally if you have access to the GAMS solver • Includes sample models that represent sections of an actual electricity market iPhone and iPad functionality is the same. Zoom and scroll allow the iPhone to access iPad sized models.

About

English Electrical Engineering

Master essential English vocabulary for electrical engineering. This app uses flashcards and eight learning methods to help students and professionals understand technical terms for better communication and study. Track your progress and build confidence in specialized discussions.

Highlights
  • Technical vocabulary for electrical engineers
  • Flashcard learning method
  • Eight diverse word-learning techniques
  • Study progress tracking and statistics
  • Word tracking system
  • Covers control systems, power generation, electronics
Features
Read full description

Learning English vocabulary for electrical engineering brings real advantages to your education and work. Knowing the right technical terms allows every student, engineer, or electrician to study and communicate confidently in professional environments. Expanding your vocabulary helps you understand complex texts, handle manuals, and express yourself clearly in discussions about circuits, power systems, or electronics. Each word learned supports your progress in both study and job performance. Practical learning through flashcards makes studying effective and focused on real-life situations. Each card presents useful English words and terminology that electrical engineers and technicians meet every day. The methods used encourage repetition, understanding, and long-term memory. This practical approach fits perfectly for technical students and professionals who value efficient learning. Eight different word-learning methods keep your study process dynamic and enjoyable. You can review vocabulary, test yourself, and repeat difficult terms in a structured way. Every method focuses on improving understanding of technical words used in electrical engineering. It helps you recognize vocabulary in professional documents and apply it in real communication at work or university. The variety of techniques supports vocabulary growth through reading, writing, and recognition. The learning process strengthens comprehension and accuracy when dealing with electrical terms such as voltage, current, resistance, or transformer. Mastering this specialized English vocabulary improves your ability to read engineering books, interpret diagrams, and follow technical discussions naturally. Study progress tracking and statistics let you see how your learning develops over time. The clear overview of learned and unlearned words keeps your studies organized and motivates consistent progress. Each learning session contributes to your growing command of professional English used by electrical engineers around the world. The word tracking system helps you manage what you already know and what still needs attention. You can mark words as learned or not and return to review specific sets whenever you choose. This organized system saves time and supports efficient preparation for exams, work projects, or international collaboration. Extensive vocabulary covers a wide range of topics within electrical engineering, including control systems, power generation, electronics, and installation. Each section contains accurate and practical terminology suitable for both academic study and on-the-job communication. This educational approach connects language learning with technical knowledge, making it ideal for any student or professional aiming to improve. Fast progress, clear structure, and accessible design make the learning experience suitable for every level. Both beginners and advanced users can study English electrical engineering vocabulary effectively without unnecessary complexity. The methods encourage active learning and help users expand their professional English naturally. Improving your vocabulary strengthens your confidence in communication, research, and documentation. It opens opportunities for education and technical work in international environments where English is essential. Building this knowledge step by step supports your growth as a competent and well-prepared engineer. Support: appsfenls@gmail.com Terms of use & Privacy policy: https://apps.fenls.com/legacy.html

Screenshots

Simplex Nodal4 screens
English Electrical Engineering4 screens

Verdict

The call

The clearest difference is in-app purchases: Simplex Nodal at none against English Electrical Engineering's 6. Simplex Nodal also leads on ads (none vs shown) and iOS requirement (9.0 vs 15.0). English Electrical Engineering's advantage is update cadence (fortnightly vs every 4 months). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. English Electrical Engineering sells 6 in-app purchases, starting at $8.49 per 7 days. Simplex Nodal asks for nothing beyond the download.

UpkeepUpdate frequency

Simplex Nodal ships an update every 4 months, English Electrical Engineering fortnightly. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Simplex Nodal versus English Electrical Engineering: the parameters behind the verdict, then further details
ParameterSimplex NodalEnglish Electrical Engineering
PriceFreeFree
Rating—3.9 (8 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—8 — better
Update frequencyEvery 4 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size14 MB53 MB
Age rating4+4+
DeveloperSimplex Nodal LimitedNelly Latypova

Customer experience

Simplex Nodal

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

English Electrical Engineering

All ratings7 ratings
Positive71.4%
Neutral0.0%
Negative28.6%

In-app purchases

None

Simplex Nodal

No in-app purchases

6 purchases

English Electrical Engineering

Subscriptions6
  • Electrical Vocabulary Pro3 Days trial$8.497 Days
  • Technical Vocabulary Pro$8.491 Month
  • Technical Vocabulary Pro3 Days trial$9.491 Month
Show 3 more
  • Engineering Terminology Pro3 Days trial$29.993 Months
  • Pro Complete Technical Terms3 Days trial$34.991 Year
  • Pro Complete Technical Terms$34.991 Year

Questions

Is Simplex Nodal free?
Simplex Nodal is free to download, with no in-app purchases.
Is English Electrical Engineering free?
English Electrical Engineering is free to download, with in-app purchases available.
Do Simplex Nodal or English Electrical Engineering have ads?
English Electrical Engineering shows ads; Simplex Nodal does not.
Which is updated more often, Simplex Nodal or English Electrical Engineering?
Simplex Nodal ships an update every 4 months, and English Electrical Engineering fortnightly. Most recently, Simplex Nodal was updated on November 1, 2026 and English Electrical Engineering on October 24, 2026.

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