Comparison

Pipe Trades Pro Calc vs FlowLine Isometric

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

Head to head
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

About

FlowLine Isometric

A professional tool for creating isometric piping diagrams. It allows pipefitters, plumbers, engineers, and contractors to quickly sketch and document pipe runs with a snap grid for precise isometric projection.

Highlights
  • Isometric projection drawing
  • Snap grid for precise lines
  • Quick sketching and documentation
  • On-site or office use
  • Focus on layout
Features
Read full description

Flowline is a professional isometric piping diagram tool built for pipefitters, plumbers, mechanical engineers, and contractors who need to sketch and document pipe runs quickly on site or in the office. Draw in true isometric projection with a snap grid that keeps every line on axis. Flowline handles the geometry so you can focus on the layout.

Screenshots

Pipe Trades Pro Calc4 screens
FlowLine Isometric4 screens

Verdict

The call

The clearest difference is rating: Pipe Trades Pro Calc at 4.8 against FlowLine Isometric's 4.0. Pipe Trades Pro Calc also leads on ratings volume (4.4K vs 11) and chart position (#163 vs unranked). FlowLine Isometric's advantage is in-app purchases (none vs 6) and update cadence (every 6 weeks vs every 7 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. Pipe Trades Pro Calc sells 2 in-app purchases, starting at $4.99 per month. FlowLine Isometric asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Pipe Trades Pro Calc holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Pipe Trades Pro Calc has 4.4K ratings behind it against 11, so its average is the more settled of the two.

UpkeepUpdate frequency

Pipe Trades Pro Calc ships an update every 7 months, FlowLine Isometric every 6 weeks. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

Scorecard7 real differences · 4 level
Pipe Trades Pro Calc versus FlowLine Isometric: the parameters behind the verdict, then further details
ParameterPipe Trades Pro CalcFlowLine Isometric
PriceFreeFree
Rating4.8 (4.4K ratings) — better4.0 (11 ratings)
Positive reviews42.6% of reviews—
Number of ratings4.4K — better11
Update frequencyEvery 7 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#163 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better26.0
Further details — not scored
Size51 MB23 MB
Age rating12+4+
DeveloperCalculated IndustriesJoshua Parkin

Bugs and requests

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

FlowLine Isometric

Not enough reviews yet to summarise bugs or requests.

In-app purchases

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
None

FlowLine Isometric

No in-app purchases

Questions

Is Pipe Trades Pro Calc free?
Pipe Trades Pro Calc is free to download, with in-app purchases available.
Is FlowLine Isometric free?
FlowLine Isometric is free to download, with no in-app purchases.
Which has better reviews, Pipe Trades Pro Calc or FlowLine Isometric?
Pipe Trades Pro Calc is rated higher. Pipe Trades Pro Calc averages 4.8 out of 5 from 4.4K ratings, while FlowLine Isometric averages 4.0 from 11 ratings.
Do Pipe Trades Pro Calc or FlowLine Isometric have ads?
Neither Pipe Trades Pro Calc nor FlowLine Isometric shows ads.
Which is updated more often, Pipe Trades Pro Calc or FlowLine Isometric?
Pipe Trades Pro Calc ships an update every 7 months, and FlowLine Isometric every 6 weeks. Most recently, Pipe Trades Pro Calc was updated on October 29, 2026 and FlowLine Isometric on October 28, 2026.

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