Comparison

Circuit Navigator vs Unit Converter For Engineers

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

Head to head
About

Circuit Navigator

Read full description

​Revolutionize your electrical testing with our Navi tester and Circuit Navigator app. Get real-time insights into wiring issues and pinpoint problems with precision. See instant feedback in our app to voltage, light and vibration changes! Our app lets you organize and track test results by named outlet, saving you time and hassle. Easily map electrical breakers to their corresponding circuits for even more efficient troubleshooting. Plus, create comprehensive site reports automatically to document your findings and share with clients. ​ Validate existing breaker panel labeling, discover errors and correct incomplete mapping. Wireless operation means one person can map outlets throughout the facility. Detect and identify common wiring problems: Open Ground - Open Neutral - Open Hot - Hot/Neutral Reversed Additional test features: GFCI triggering, works remotely. Built-in Light Sensor to map breakers to light fixture and refrigerators. Built-in Vibration Sensor to map breakers to anything with a motor: AC Units, Pumps, Fans. Create Detailed Site reports to keep a record of your test results and wiring map.

About

Unit Converter For Engineers

This app provides a comprehensive unit conversion tool specifically designed for engineers, offering specialized units not found in standard converters. It features offline functionality, fast search, and a clean interface, replacing the need for multiple reference materials.

Highlights
  • Specialized engineering units
  • Offline functionality
  • Fast search and instant conversion
  • Fraction input mode
  • Ad-free interface
  • Scientific notation support
Features
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Built for engineers who work with units most converters don’t have. No ads. No popups. No distractions. If you’ve ever opened PDFs, charts, or old handbooks to convert Rockwell hardness, wire gauge, HVAC airflow, radiation dose, water hardness, or torque units — this app replaces all of that. Units you usually can’t find in converter apps Material Hardness Rockwell (HRC, HRB, HRA), Vickers, Brinell, Knoop, Mohs, Shore Wire Gauge AWG, SWG, MCM, kcmil, diameter, cross-sectional area HVAC & Airflow CFM, ACH, BTU/h, tons of cooling, kW, airflow per area and per person Water Quality & Chemistry ppm, mg/L as CaCO₃, grains per gallon (US/UK), °dH, °fH, dKH, mmol/L, meq/L Radiation & Radioactivity Becquerel, Curie, Gray, rad Mechanical & Structural Torque, stress, density, pressure, moment of inertia (kg·m² ↔ slug·ft²) Built for real work environments • Works 100% offline in labs, plants, and job sites • Fast search and instant conversion • Scientific notation for precision work • Fraction input mode for field and construction use • Clean, engineer-friendly interface — no ads, ever This app replaces reference charts, calculators, handbooks, and repeated Google searches with one reliable tool in your pocket. Pricing 7-Day Free Trial $9.99/year full access $29.99 lifetime access Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://unitconvertx.github.io/docs/privacy.html

Screenshots

Circuit Navigator3 screens
Unit Converter For Engineers4 screens

Verdict

The call

The clearest difference is in-app purchases: Circuit Navigator at none against Unit Converter For Engineers's 2. Circuit Navigator also leads on iOS requirement (13.0 vs 16.2). Unit Converter For Engineers's advantage is update cadence (every 9 days vs every 5 months). On price, ads 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. Unit Converter For Engineers sells 2 in-app purchases, starting at $9.99 per year. Circuit Navigator asks for nothing beyond the download.

UpkeepUpdate frequency

Circuit Navigator ships an update every 5 months, Unit Converter For Engineers every 9 days. The most recent releases landed on October 9, 2026 and October 18, 2026 respectively.

Scorecard3 real differences · 7 level
Circuit Navigator versus Unit Converter For Engineers: the parameters behind the verdict, then further details
ParameterCircuit NavigatorUnit Converter For Engineers
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 5 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.2
Further details — not scored
Size24 MB5 MB
Age rating4+17+
DeveloperPersistent Engineering LLCAmanuel Abebaw

In-app purchases

None

Circuit Navigator

No in-app purchases

2 purchases

Unit Converter For Engineers

Subscriptions1
  • Annual Subscription7 Days trial$9.991 Year
One-time1
  • Lifetime Access$29.99

Questions

Is Circuit Navigator free?
Circuit Navigator is free to download, with no in-app purchases.
Is Unit Converter For Engineers free?
Unit Converter For Engineers is free to download, with in-app purchases available.
Do Circuit Navigator or Unit Converter For Engineers have ads?
Neither Circuit Navigator nor Unit Converter For Engineers shows ads.
Which is updated more often, Circuit Navigator or Unit Converter For Engineers?
Circuit Navigator ships an update every 5 months, and Unit Converter For Engineers every 9 days. Most recently, Circuit Navigator was updated on October 9, 2026 and Unit Converter For Engineers on October 18, 2026.

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