Comparison

Southwire® Voltage Drop Calc vs SimplyAuth

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

SimplyAuth

Read full description

Some things should never live in your text history. Passwords. Social Security numbers. Card numbers. Wi-Fi codes. The recovery phrase for your account. We all end up texting this stuff — and then it sits in a thread forever, on two phones, backed up to two clouds, one screenshot away from the wrong hands. SimplyAuth is built for exactly that moment. Send it encrypted. Watch it vanish. Open a Session with someone, share the sensitive thing, and it's protected end-to-end — encrypted on your device, decrypted only on theirs. Our servers never see the contents. When the Session ends, the message is gone — no history, no backup, no trail. Know who's really on the other end. Before you share a secret, you should know who you're sharing it with. SimplyAuth connections are verified — and when you're on a phone call, both sides can confirm each other with a phrase that rotates every 60 seconds. If the phrases match, it's really them. If they don't, hang up. It's the same idea as a one-time login code, but for people. Safety built in — and always free. Set a check-in, and if you don't confirm you're okay, your trusted contacts are alerted. Set a duress signal that quietly calls for help without tipping off anyone watching. These safety features are never behind a paywall. Privacy by design. - End-to-end encryption — we can't read your messages, even if we wanted to. - Ephemeral by default — sensitive content isn't meant to be kept, so it isn't. - Verified connections — you choose who you can exchange secrets with. - No ads. No data sales. Ever. Simple pricing. One subscription unlocks everything: $0.99/month or $7.99/year, with a 30-day free trial. Safety features stay free for everyone. Stop putting your most sensitive information somewhere it was never safe. Share it the way it should have been shared all along. simplyauth.app

Screenshots

Southwire® Voltage Drop Calc4 screens
SimplyAuth4 screens

Verdict

The call

The clearest difference is in-app purchases: Southwire® Voltage Drop Calc at none against SimplyAuth's 2. On price, update cadence, 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. SimplyAuth sells 2 in-app purchases, starting at $0.99 per month. Southwire® Voltage Drop Calc asks for nothing beyond the download.

UpkeepUpdate frequency

Southwire® Voltage Drop Calc ships an update every 2 months, SimplyAuth every 3 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

Scorecard1 real difference · 9 level
Southwire® Voltage Drop Calc versus SimplyAuth: the parameters behind the verdict, then further details
ParameterSouthwire® Voltage Drop CalcSimplyAuth
PriceFreeFree
Rating4.6 (1.5K ratings) — better—
Positive reviews49.1% of reviews—
Number of ratings1.5K — better—
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size10 MB57 MB
Age rating4+4+
DeveloperSouthwire CompanySimplyAuth LLC

Bugs and requests

Southwire® Voltage Drop Calc

Reported bugs

24 issues
  • Useless!
  • Won't work
  • How to use
  • Confused
  • Bad app
Show 19 more
  • 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

SimplyAuth

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Southwire® Voltage Drop Calc

No in-app purchases

2 purchases

SimplyAuth

Subscriptions2
  • Personal$0.991 Month
  • Personal$7.991 Year

Questions

Is Southwire® Voltage Drop Calc free?
Southwire® Voltage Drop Calc is free to download, with no in-app purchases.
Is SimplyAuth free?
SimplyAuth is free to download, with in-app purchases available.
Do Southwire® Voltage Drop Calc or SimplyAuth have ads?
Neither Southwire® Voltage Drop Calc nor SimplyAuth shows ads.
Which is updated more often, Southwire® Voltage Drop Calc or SimplyAuth?
Southwire® Voltage Drop Calc ships an update every 2 months, and SimplyAuth every 3 months. Most recently, Southwire® Voltage Drop Calc was updated on October 30, 2026 and SimplyAuth on October 25, 2026.

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