Southwire® Voltage Drop Calc vs Leviton Smart Sensor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Southwire® Voltage Drop Calc
Calculate the appropriate wire size for electrical circuits. This tool helps determine wire size based on voltage drop and current carrying capacity, ensuring compliance with NEC ampacity limits.
- Determine wire size for voltage drop
- Calculate voltage drop for conductor runs
- Limit wire size by voltage drop
- Limit wire size by NEC ampacity
- Supports AWG and KCMIL sizes
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Southwire's voltage drop calculator will help you determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of an electrical circuit. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.
Leviton Smart Sensor
Configure and interact with Leviton Smart Sensor products. Tailor sensor settings to specific space requirements and comply with energy codes. Suitable for installers, building maintenance, and end-users.
- Configure smart sensor products
- Set space requirements
- Comply with energy codes
- Interact with sensors
- Suitable for installers and end-users
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This app can be used to interact with any of Leviton’s Smart Sensor products. The application allows user’s to configure the sensor based on the requirements for the space and per the industry’s latest energy code requirements. Application is appropriate to be used by installers, building maintainers, and end-users.
Screenshots
Verdict
The clearest difference is rating: Southwire® Voltage Drop Calc at 4.6 against Leviton Smart Sensor's 3.9. Southwire® Voltage Drop Calc also leads on ratings volume (1.5K vs 9) and update cadence (every 2 months vs every 5 months). Leviton Smart Sensor's advantage is review sentiment (67% vs 48%) and iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
Southwire® Voltage Drop Calc holds the better App Store score, 4.6 against 3.9. That said, the two scores are not equally well evidenced: Southwire® Voltage Drop Calc has 1.5K ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 48% of Southwire® Voltage Drop Calc's written reviews are positive against 67% of Leviton Smart Sensor's, so the app with the better star average is not the one people write more warmly about.
Southwire® Voltage Drop Calc ships an update every 2 months, Leviton Smart Sensor every 5 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.
| Parameter | Southwire® Voltage Drop Calc | Leviton Smart Sensor |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (1.5K ratings) — better | 3.9 (9 ratings) |
| Positive reviews | 48.1% of reviews | 66.7% of reviews — better |
| Number of ratings | 1.5K — better | 9 |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Southwire Company | Leviton Manufacturing Co. Inc. |
Customer experience
Southwire® Voltage Drop Calc
Leviton Smart Sensor
Bugs and requests
Southwire® Voltage Drop Calc
Reported bugs
24 issues- Useless!
- Won't work
- How to use
- Confused
- Bad app
Show 19 moreShow fewer
- Bad
- Not applicable for Residential
- Electrician
- Terrible
- Not working
- What??
- Terrible
- Don't work
- Terrible
- Choice Between AWG and Metric wire Gauge
- Updated app not so simple
- The last version was better
- App
- Terrible
- Voltage drop calculator
- IOS 8
- One flaw
- Worst app ever
- Average
Requested features
2 requests- Motor starting Voltage drop calculation
- Metric wire size options
Leviton Smart Sensor
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Southwire® Voltage Drop Calc
No in-app purchases
Leviton Smart Sensor
No in-app purchases
Questions
Is Southwire® Voltage Drop Calc free?
Is Leviton Smart Sensor free?
Which has better reviews, Southwire® Voltage Drop Calc or Leviton Smart Sensor?
Do Southwire® Voltage Drop Calc or Leviton Smart Sensor have ads?
Which is updated more often, Southwire® Voltage Drop Calc or Leviton Smart Sensor?
Other comparisons
