Comparison

FlowLine Isometric vs Pipe Craftsmen

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

Head to head
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.

About

Pipe Craftsmen

Features
Read full description

Pipe Craftsmen is the pipefitter's toolbox: the numbers you work to, in the tape's own language, with every dimension copied from the published tables and every drawing showing where the number runs on the steel. THE SPOOL Build a spool piece by piece - pipe, fittings, valves, field welds - branching at a tee. Add an offset the way you measure it, run and offset, or a rolled one with its roll; the elbows go in by themselves, stock 45s or a 90 cut down to the odd angle. Lay an equal spread beside it. Read the drawing as an iso, a plan or any elevation, tap a pipe to put the ruler on it, and get the cut list: center to center less the fittings, every weld counted. THE ISOMETRIC Draw a run leg by leg, or sketch it with a finger on the grid. Turn the compass, swipe between the iso, the plan and the elevations. With the bender attached, every turn becomes a bend: the tube to cut, each bend's angle and centerline mark, and the roll between bends. THE CALCULATOR Feet, inches and fractions natively - 5'-6" + 3'-9" reads back 9'-3". Metric keys, angle mode with decimal and DMS entry, store and recall shared across every keypad in the app, session history, and your starred measurements one tap from the display. THE FITTINGS REFERENCE Every dimension of every fitting, from the published tables: butt weld, socket weld, threaded, flanges and grooved. Every page draws its fitting in section with the selected takeoff dimensioned on the steel. Set your root gap, socket pull-back, thread make-on and grooved separation once; every takeoff in the app follows. The Fitting Finder searches the whole set without leaving the calculator. THE TOOLS - Pipe Offset, plain or rolled: solve the triangle, then the fitting each end needs, the pipe between and its weight - Triangle: any two facts of the right triangle, the rest solved and drawn - Equal Spread: the advance that keeps parallel lines parallel through a turn - Miter Joints: cut angle, cutback, and the blank drawn flat on the bench - Fitting Cutdown: a 90 cut to any angle, with the three arcs to mark - Rolled Olet: set a roll angle with a tape measure - Tube Bending: one bend, a run of bends, or a run drawn as an iso - Pipe Information: bore, wall, circumference, and the weights you rig by IN YOUR POCKET Built for a phone held one-handed on a rack: big keys, answers that read at arm's length, and everything working without a signal. On an iPad the pages open out. PRO The calculator, pipe information and a selection of fittings in every connection are free. Pro opens the rest: a monthly or yearly subscription, or a lifetime license bought once that never renews. Terms of Use: https://pipe-craftsmen.com/terms-of-use Privacy Policy: https://pipe-craftsmen.com/privacy-policy

Screenshots

FlowLine Isometric4 screens
Pipe Craftsmen4 screens

Verdict

The call

The clearest difference is in-app purchases: FlowLine Isometric at none against Pipe Craftsmen's 3. Pipe Craftsmen's advantage is iOS requirement (15.0 vs 26.0). 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. Pipe Craftsmen sells 3 in-app purchases, starting at $5.99 per month. FlowLine Isometric asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 7 level
FlowLine Isometric versus Pipe Craftsmen: the parameters behind the verdict, then further details
ParameterFlowLine IsometricPipe Craftsmen
PriceFreeFree
Rating4.0 (11 ratings) — better—
Number of ratings11 — better—
Update frequencyEvery 6 weeksEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.015.0 — better
Further details — not scored
Size23 MB31 MB
Age rating4+4+
DeveloperJoshua ParkinVICTOR DIGITAL TOOLS LLC

In-app purchases

None

FlowLine Isometric

No in-app purchases

3 purchases

Pipe Craftsmen

Subscriptions2
  • Pipe Craftsmen Pro Monthly1 Month trial$5.991 Month
  • Pipe Craftsmen Pro Annual1 Month trial$39.991 Year
One-time1
  • Pipe Craftsmen Pro — Lifetime$119.99

Questions

Is FlowLine Isometric free?
FlowLine Isometric is free to download, with no in-app purchases.
Is Pipe Craftsmen free?
Pipe Craftsmen is free to download, with in-app purchases available.
Do FlowLine Isometric or Pipe Craftsmen have ads?
Neither FlowLine Isometric nor Pipe Craftsmen shows ads.
Which is updated more often, FlowLine Isometric or Pipe Craftsmen?
FlowLine Isometric ships an update every 6 weeks, and Pipe Craftsmen every 6 weeks. Most recently, FlowLine Isometric was updated on October 28, 2026 and Pipe Craftsmen on October 24, 2026.

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