Comparison

Trigonometry Help vs Pipe Trades Pro 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

Pipe Trades Pro Calc

This app provides advanced calculation tools and comprehensive data for pipe trade professionals. It streamlines workflows for pipefitters, welders, and steamfitters with features for measurements, fluid dynamics, and material specifications. Designed for efficiency and accuracy, it works offline for on-site use.

Highlights
  • Advanced measurement calculations
  • Fluid dynamics and pressure analysis
  • Comprehensive pipe data access
  • Offline functionality
  • User-centric interface
  • Material and dimension options
Features
Read full description

FREE Try Before You Buy trial, your App Store account is not charged by Apple during the free trial. Welcome to Pipe Trades Pro for iPhone, a game-changing tool for professionals in the pipe trades industry. This application is expertly designed to enhance the efficiency and accuracy of pipefitters, steamfitters, sprinklerfitters, and welders. From complex calculations to extensive pipe data, Pipe Trades Pro is your go-to solution for a streamlined work process. ----- ADVANCED CALCULATION CAPABILITIES ----- • Tackle complex measurements like cut lengths, take-outs, and odd-degree fittings easily • Navigate through right angles, offsets, and intricate rolling offsets confidently • Utilize tools for determining pipe areas, fill weights, and unit conversions • Efficiently manage parallel pipe cutbacks with accurate alignment and spacing • Incorporate feet-inch-fractions and trigonometry for precise measurement adjustments ----- FLUID DYNAMICS AND PRESSURE ANALYSIS ----- • Accurately compute flow rates, velocity, force, and volumes for diverse fluid types • Assess pressure loss effectively across any pipe size, type, or distance • Make informed decisions based on dynamic fluid properties and behaviors • Optimize piping systems for maximum flow efficiency and safety ----- COMPREHENSIVE PIPE DATA ACCESS ----- • Access vital information for pipes up to 42 inches, including diameters and wall thickness • Select from materials like steel, stainless steel, brass, aluminum, etc. • Quickly reference internal area and filled weight per foot for different pipe types • Make informed choices with extensive material and dimension options ----- USER-CENTRIC INTERFACE DESIGN ----- • Experience a streamlined, intuitive interface designed for quick and easy navigation • Access key features with minimal taps, saving time and enhancing user experience • Benefit from an interface that optimizes the iPhone’s screen space and usability • Enjoy a clutter-free, visually appealing layout for stress-free operation • Adapt quickly with an interface designed for both new and experienced users ----- OFFLINE FUNCTIONALITY AND SUPPORT ----- • Utilize full app capabilities without an internet connection, perfect for on-site tasks • Access all data and features offline, ensuring uninterrupted productivity • Rely on consistent app performance in remote or internet-challenged locations • Receive dedicated customer support for any queries or technical issues Pipe Trades Pro for iPhone is not just an application; it's a comprehensive tool transforming how pipe trade professionals work. It combines advanced technology, user-friendly design, and practical features to create a smoother, more efficient workflow. Embrace the future of pipe layout and design with Pipe Trades Pro, where accuracy meets efficiency. SUBSCRIPTION INFORMATION Your Free Trial period is free of charge. Subscriptions offered will automatically renew at the end of the chosen period. Payment will be charged to your Apple account upon purchase confirmation. The subscription will automatically renew unless auto-renew is turned off or the subscription is canceled in settings at least one day (24 hours) before the subscription period ends. You can manage your subscription and turn off auto-renewal in your Apple account Settings > Subscriptions. LEGAL Pipe Trades Pro is a trademark of Calculated Industries, Inc. Copyright 2025

Screenshots

Trigonometry Help4 screens
Pipe Trades Pro Calc4 screens

Verdict

The call

Trigonometry Help and Pipe Trades Pro Calc both sit at 4.7 stars, but that hides the real split: 91% of Trigonometry Help's written reviews are positive against 42% of Pipe Trades Pro Calc's. Trigonometry Help also leads on iOS requirement (10.0 vs 14.0). Pipe Trades Pro Calc's advantage is price (Free vs $1.99) and chart position (#195 vs unranked). On rating, update cadence, ads and in-app purchases 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

Pipe Trades Pro Calc is free to download; Trigonometry Help costs $1.99 up front. Trigonometry Help sells 3 one-off in-app purchases and Pipe Trades Pro Calc sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Trigonometry Help against 4.8 for Pipe Trades Pro Calc. That said, the two scores are not equally well evidenced: Pipe Trades Pro Calc has 4.3K ratings behind it against 477, so its average is the more settled of the two. Written reviews are what separate them: 91% of Trigonometry Help's written reviews are positive against 42% of Pipe Trades Pro Calc's.

UpkeepUpdate frequency

Trigonometry Help ships an update every 13 months, Pipe Trades Pro Calc every 7 months. The most recent releases landed on September 23, 2026 and September 27, 2026 respectively.

Scorecard5 real differences · 6 level
Trigonometry Help versus Pipe Trades Pro Calc: the parameters behind the verdict, then further details
ParameterTrigonometry HelpPipe Trades Pro Calc
Price$1.99Free — better
Rating4.7 (477 ratings)4.8 (4.3K ratings) — better
Positive reviews90.8% of reviews — better42.5% of reviews
Number of ratings4774.3K — better
Update frequencyEvery 13 monthsEvery 7 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#195 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better14.0
Further details — not scored
Size21 MB51 MB
Age rating+412+
DeveloperArmchair EngineeringCalculated Industries

Customer experience

Trigonometry Help

All ratings477 ratings
Positive94.1%
Neutral2.3%
Negative3.6%
Written reviews141 reviews
Positive90.8%
Neutral2.1%
Negative7.1%

Pipe Trades Pro Calc

All ratings4,282 ratings
Positive95.6%
Neutral1.2%
Negative3.2%
Written reviews106 reviews
Positive42.5%
Neutral11.3%
Negative46.2%

User reviews

Trigonometry Help

From 477 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

Pipe Trades Pro Calc

From 4.3K App Store ratings

What we love

  • 🔢 Useful calculator tool
  • 🧠 Helpful for pipe fitters and welders
  • 📱 Convenient to have on mobile device
  • 🔍 Accurate calculations

Room to improve

  • 💰 Subscription model is too expensive
  • 🔒 Requires internet connection to verify subscription
  • 🔄 Used to be a one-time purchase
  • 🤔 Confusing transition from one-time to subscription

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

Pipe Trades Pro Calc

Reported bugs

3 issues
  • App freezes or stops working after updates
  • Calculation errors with fractions
  • Issues with reinstalling or transferring purchases

Requested features

4 requests
  • Ability to use app without subscription
  • Support for larger pipe sizes
  • Add a back/undo button
  • Rotate screen orientation

In-app purchases

3 purchases

Trigonometry Help

One-time3
  • Trig Help Premium$0.99
  • Trig Help Premium$1.99
  • Trig Help Premium$3.99
2 purchases

Pipe Trades Pro Calc

Subscriptions2
  • 1 Month Full Access14 Days trial3 variants$4.991 Month
  • 1 Year Full Access14 Days trial3 variants$39.991 Year

Questions

Is Trigonometry Help free?
Trigonometry Help costs $1.99, and also offers in-app purchases.
Is Pipe Trades Pro Calc free?
Pipe Trades Pro Calc is free to download, with in-app purchases available.
Which has better reviews, Trigonometry Help or Pipe Trades Pro Calc?
Pipe Trades Pro Calc is rated higher. Trigonometry Help averages 4.7 out of 5 from 477 ratings, while Pipe Trades Pro Calc averages 4.8 from 4.3K ratings.
Do Trigonometry Help or Pipe Trades Pro Calc have ads?
Neither Trigonometry Help nor Pipe Trades Pro Calc shows ads.
Which is updated more often, Trigonometry Help or Pipe Trades Pro Calc?
Trigonometry Help ships an update every 13 months, and Pipe Trades Pro Calc every 7 months. Most recently, Trigonometry Help was updated on September 23, 2026 and Pipe Trades Pro Calc on September 27, 2026.

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