Comparison

Trigonometry Help vs Southwire® Conduit Fill Calc

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

Head to head
About

Trigonometry Help

This app helps you quickly solve for unknown angles and sides of right-angled triangles. It provides a workings view for understanding the math, a scale drawing of the triangle, and a reference for basic trigonometric formulas. You can input angles in various formats and choose your desired decimal precision.

Highlights
  • Solve right-angled triangles
  • Workings view for solutions
  • Scale drawing of solved triangle
  • Basic trig formulae reference
  • Multiple angle input formats
  • Customizable decimal places
Features
Read full description

Trig Help is a simple triangle calculator that enables you to quickly and easily find unknown angles & sides of any right-angled triangle. Features Include: - Accurately solve right-angled triangles - Workings view, so you can see the math behind the solutions (requires optional upgrade) - View a scale drawing of your solved triangle - View a handy set of basic trig formulae - Enter angles in radians, decimal degrees or degrees, minutes, seconds - Select your preferred number of decimal places What two App Store reviewers had to say about Trig Help: "I could never remember those simple formulas. I always had to dig out my text books from MANY YEARS ago to refresh my memory. THIS LITTLE APP IS A DELIGHT TO USE! I love it! Even my engineer friends are impressed. THANKS!" 5 Stars "Easy to use and accurate with high degree of precision. Would recommend to any toolmaker." 5 Stars Also available for OS X on the Mac App Store.

About

Southwire® Conduit Fill Calc

This tool assists electricians, engineers, and contractors in determining the correct conduit size based on NEC guidelines. It calculates conduit fill percentages and jam probability, saving time compared to manual calculations.

Highlights
  • Conduit size calculation
  • NEC fill percentages
  • Jam probability
  • Email results
  • Quick navigation
Features
Read full description

Southwire has created this great tool to help electricians, engineers and contractors answer the question, “What size conduit do I use” per the NEC®, includes fill percentages and jam probability.  If you do not have the NEC book handy or do not want to spend time manually calculating the Conduit Fill %, this is the right app for you. The app provides quick and easy navigation.  Enter the Conduit Type and Size and specify your conductors.  The App will calculate the Conduit Fill % as per NEC Guidelines.  Southwire Company is North America’s leading manufacturer of wire and cable used in the distribution transmission of electricity.  Throughout its history, our company has sought to deliver power through our products, our service and by helping empower our customers, employees and communities. The App Answers the question, “What size conduit do I use” includes fill percentages and jam probability per the NEC®.  With one click, you can email your results.

Screenshots

Trigonometry Help4 screens
Southwire® Conduit Fill Calc3 screens

Verdict

The call

The clearest difference is price: Southwire® Conduit Fill Calc at Free against Trigonometry Help's $1.99. Southwire® Conduit Fill Calc also leads on in-app purchases (none vs 3) and update cadence (monthly vs every 13 months). Trigonometry Help's advantage is review sentiment (91% vs 70%) and rating (4.7 vs 4.5). On ratings volume, 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

Southwire® Conduit Fill Calc is free to download; Trigonometry Help costs $1.99 up front. Trigonometry Help sells 3 one-off in-app purchases. Southwire® Conduit Fill Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Trigonometry Help holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 482 and 773 respectively. Written reviews point the same way: 91% of Trigonometry Help's written reviews are positive against 70% of Southwire® Conduit Fill Calc's.

UpkeepUpdate frequency

Trigonometry Help ships an update every 13 months, Southwire® Conduit Fill Calc monthly. The most recent releases landed on November 11, 2026 and November 6, 2026 respectively.

Scorecard7 real differences · 3 level
Trigonometry Help versus Southwire® Conduit Fill Calc: the parameters behind the verdict, then further details
ParameterTrigonometry HelpSouthwire® Conduit Fill Calc
Price$1.99Free — better
Rating4.7 (482 ratings) — better4.5 (773 ratings)
Positive reviews91.0% of reviews — better70.2% of reviews
Number of ratings482773 — better
Update frequencyEvery 13 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS10.0 — better16.6
Further details — not scored
Size21 MB17 MB
Age rating+44+
DeveloperArmchair EngineeringSouthwire Company

Customer experience

Trigonometry Help

All ratings477 ratings
Positive94.1%
Neutral2.3%
Negative3.6%
Written reviews144 reviews
Positive91.0%
Neutral2.1%
Negative6.9%

Southwire® Conduit Fill Calc

All ratings770 ratings
Positive86.1%
Neutral3.2%
Negative10.6%
Written reviews47 reviews
Positive70.2%
Neutral4.3%
Negative25.5%

User reviews

Trigonometry Help

From 482 App Store ratings

What we love

  • 🚀 Quick and easy to use
  • 👍 User-friendly interface
  • 🔧 Helpful for tradesmen and professionals
  • ⚙️ Accurate calculations
  • 🔍 Convenient for on-site use

Room to improve

  • 🔢 Limited to right-angled triangles only
  • 🔍 Lacks advanced trig functions
  • 🔀 No option to rotate/flip the triangle view

Southwire® Conduit Fill Calc

From 773 App Store ratings

What we love

  • 🚀 Quick and easy calculations
  • 👍 User-friendly interface with spin wheel controls
  • 📊 Shows actual fill percentage and NEC compliance
  • 🔧 Ability to add multiple wire sizes simultaneously
  • 💾 Customizable wire data entry

Room to improve

  • ⚠️ Accuracy issues reported by multiple users
  • ❌ Limited wire gauge options (missing 16 & 18 AWG)
  • 🔄 Changing conduit type erases conduit size
  • 📉 Jam probability calculations unreliable
  • 🗑️ No data persistence between calculations

Bugs and requests

Trigonometry Help

Reported bugs

2 issues
  • Inconsistent performance on older devices
  • Occasional crashes or freezes

Requested features

3 requests
  • Support for irregular triangles
  • Ability to show step-by-step workings
  • Option to switch between degrees/minutes/seconds and decimal values

Southwire® Conduit Fill Calc

Reported bugs

6 issues
  • Blank white screen on app launch
  • Conduit size data erased when changing conduit type
  • Inaccurate fill calculations compared to NEC standards
  • Jam probability calculations not accurate
  • App crashes and fails to display results
Show 1 more
  • No method to reload or recover from crashes

Requested features

8 requests
  • Add 16 & 18 AWG wire sizes
  • Include bare solid copper and other conductor types
  • Save calculation history/results
  • Voltage drop calculator
  • Maximum wire count per conduit type calculator
Show 3 more
  • Conduit length parameter
  • Restore calculate button functionality
  • Auto-fill missing fields

In-app purchases

3 purchases

Trigonometry Help

One-time3
  • Trig Help Premium$0.99
  • Trig Help Premium$1.99
  • Trig Help Premium$3.99
None

Southwire® Conduit Fill Calc

No in-app purchases

Questions

Is Trigonometry Help free?
Trigonometry Help costs $1.99, and also offers in-app purchases.
Is Southwire® Conduit Fill Calc free?
Southwire® Conduit Fill Calc is free to download, with no in-app purchases.
Which has better reviews, Trigonometry Help or Southwire® Conduit Fill Calc?
Trigonometry Help is rated higher. Trigonometry Help averages 4.7 out of 5 from 482 ratings, while Southwire® Conduit Fill Calc averages 4.5 from 773 ratings.
Do Trigonometry Help or Southwire® Conduit Fill Calc have ads?
Neither Trigonometry Help nor Southwire® Conduit Fill Calc shows ads.
Which is updated more often, Trigonometry Help or Southwire® Conduit Fill Calc?
Trigonometry Help ships an update every 13 months, and Southwire® Conduit Fill Calc monthly. Most recently, Trigonometry Help was updated on November 11, 2026 and Southwire® Conduit Fill Calc on November 6, 2026.

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