Comparison

Electrical Engineering vs Opterra Cortex

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

Head to head
About

Electrical Engineering

This app provides electrical calculations and fundamental concepts for students and professionals. It covers Ohm's Law, power calculations, circuit analysis, and advanced topics like wire sizing and power factor correction.

Highlights
  • Electrical calculations
  • Basic electrical knowledge
  • Advanced electrical topics
  • Ohm's Law and power calculations
  • Circuit analysis theorems
  • Wire sizing and voltage drop
  • Resistor color codes
Features
Read full description

Electrical engineering for technical school and college: theory, formulas and calculators explained clearly. WHY CHOOSE IT • In-depth theory for every component and circuit • Calculators for every formula • Quizzes, mind maps and flashcards for revision • AI Scanner: turn your notes into maps and solve problems TOPICS • Direct current: Ohm's law, Kirchhoff's laws • Alternating current: phasors, impedance • Components: resistors, capacitors, inductors • Circuits: series, parallel, RLC • Electric machines: motors, transformers, generators • Electronics: diodes, transistors, semiconductors STUDY TOOLS • Calculators, quizzes, mind maps, flashcards, archive IDEAL FOR Technical school students and electrical engineering majors. Start studying electrical engineering the easier way today. SUBSCRIPTIONS AND TERMS Full access is available via auto-renewable subscription: • Monthly Subscription • Annual Subscription Prices are shown in the app at purchase and may vary by region. Payment will be charged to your Apple ID at confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours of the end of the current period. Subscriptions can be managed and auto-renew turned off in your Apple ID Account Settings after purchase. Privacy Policy: https://masterapps.it/privacy_policy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Opterra Cortex

Features
Read full description

Opterra Cortex is your field service toolkit. Assess water heaters and assets on-site, capture inspection photos, and send professional health reports to homeowners — right from your phone. Walk up to any unit, enter what you see, and get an instant health score with clear recommendations you can share on the spot. No paperwork, no waiting. Track every property, customer, and piece of equipment you service in one place. Review past assessments, log maintenance, and pick up where you left off — even without cell service. Your work syncs automatically when you're back online. Focus on the job, not the app. Requires an organization account. Ask your admin to set up your login on their Cortex Dashboard.

Screenshots

Electrical Engineering4 screens
Opterra Cortex3 screens

Verdict

The call

The clearest difference is in-app purchases: Opterra Cortex at none against Electrical Engineering's 7. Opterra Cortex also leads on ads (none vs shown). Electrical Engineering's advantage is device support (3 vs 1). On price 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

Both are free to download. Electrical Engineering sells 7 in-app purchases, starting at $3.99 per month. Opterra Cortex asks for nothing beyond the download.

Scorecard3 real differences · 7 level
Electrical Engineering versus Opterra Cortex: the parameters behind the verdict, then further details
ParameterElectrical EngineeringOpterra Cortex
PriceFreeFree
Rating4.9 (11 ratings) — better—
Positive reviews73.9% of reviews—
Number of ratings11 — better—
Update frequencyEvery 2 months—
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.5 — better16.0
Further details — not scored
Size115 MB35 MB
Age rating4+4+
DeveloperCarlo TerraccianoEvan Graven

In-app purchases

7 purchases

Electrical Engineering

Subscriptions5
  • Monthly subscription - Electro$3.991 Month
  • Monthly subscription - Electro$5.991 Month
  • Annual Subscription Electronic$8.991 Year
Show 2 more
  • Annual Subscription Electronic$24.991 Year
  • Annual Subscription Electronic1 Year trial$24.991 Year
One-time2
  • Lifetime Subscription Electro$29.99
  • Lifetime Subscription Electro$99.99
None

Opterra Cortex

No in-app purchases

Questions

Is Electrical Engineering free?
Electrical Engineering is free to download, with in-app purchases available.
Is Opterra Cortex free?
Opterra Cortex is free to download, with no in-app purchases.
Do Electrical Engineering or Opterra Cortex have ads?
Electrical Engineering shows ads; Opterra Cortex does not.

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