Comparison

Fluid Mechanics Calc vs Pathly

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

Head to head
About

Fluid Mechanics Calc

This utility app provides a comprehensive calculator for fluid mechanics, civil, and structural engineering parameters. It offers over 130 formulas and 360 calculation methods, supporting seamless unit system switching for analysis, design, and operation of fluid-related systems.

Highlights
  • 130+ fluid mechanics formulas
  • 360+ calculation methods
  • Unit system conversion (metric/US)
  • Favorite formula marking
  • High mathematical precision
  • Seamless unit switching
Features
Read full description

The app is useful for the fluid thinkers. This app covers a wide variety of topics and helps in analysis, design, maintenance and operation of fluid related systems. The calculator will provide results for different fluid mechanics, civil, structural, pipe flow and engineering parameters. It is useful in the fields of automotive, aviation, geology, space, biological applications, petroleum, marine systems and cylinder manufacturing. This app comes handy to students, engineers, analysts, researchers and the curious. Here are the useful features of this app LISTS 130+ FORMULAE Memorizing hundreds of formula is not the way to go when it comes to learning fluid mechanics 360+ METHODS OF CALCULATION This calculator allows a user to change subject of formula based on the variable he/she wants to calculate. The formula applied is displayed in the app CALCULATE FOR ANSWERS Key in the numbers, set units and see results. Switch upto three conversion units. The app accepts input and provides results to the highest mathematical precision MARK FAVORITES Easy markups for easy recall HOP SEAMLESSLY BETWEEN BETWEEN METRIC AND US (INCH) UNIT SYSTEMS The app maintains separate functioning of these unit systems. The app has a predefined library of units designated to each of them It would be a good idea to kill the app and re-open it once in a while with the internet. We constantly strive to update, increase and enrich the content of the app. Go fluid with this app in your pocket!

About

Pathly

Features
Read full description

Want to check a sliced 3D print before you send it to the printer? Pathly opens a G-code file on your iPhone and shows the toolpath in 3D, layer by layer, with print time, filament and size at a glance. Tap Open a G-code File and pick a .gcode, .gco or .nc file from Files, or open one straight from another app. Pathly reads it on your iPhone and draws the path. • 3D TOOLPATH — extrusion moves in color, travel moves in grey, over a soft ground plane. Pinch to zoom and drag to rotate. • LAYER SCRUBBER — slide through the print to see it build up layer by layer, with the current layer number and Z height. • PRINT STATS — estimated print time, filament used, model size (X × Y × Z), layer count, extrude and travel moves, total path length and maximum feed rate. • READS REAL SLICER OUTPUT — G0/G1 moves and G2/G3 arcs, absolute or relative positioning and extrusion, millimeter or inch units, and files up to 80 MB. • SHARE / EXPORT — send the G-code file on to another app, AirDrop or Files. Honest scope: Pathly is a viewer — it doesn't slice, edit or send jobs to a printer. The time estimate uses path lengths and feed rates without acceleration, so your slicer's estimate may differ; filament volume assumes 1.75 mm filament. Binary G-code (.bgcode) isn't supported, and CNC or laser files without extrusion show every move as travel. Very dense files are thinned for display; the stats still count every move. Your files are opened on your iPhone only — nothing is uploaded and no account is needed. Viewing is free and unlimited. The free version shares or exports 3 files; a one-time $4.99 purchase unlocks unlimited exports. No subscription, no ads. Questions: overlapmarr@gmail.com

Screenshots

Fluid Mechanics Calc4 screens
Pathly2 screens

Verdict

The call

The clearest difference is in-app purchases: Fluid Mechanics Calc at none against Pathly's 1. Fluid Mechanics Calc also leads on device support (3 vs 1). Pathly's advantage is update cadence (every 2 days vs every 22 months). On price, ads and iOS requirement 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. Pathly sells 1 one-off in-app purchase. Fluid Mechanics Calc asks for nothing beyond the download.

UpkeepUpdate frequency

Fluid Mechanics Calc ships an update every 22 months, Pathly every 2 days. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 6 level
Fluid Mechanics Calc versus Pathly: the parameters behind the verdict, then further details
ParameterFluid Mechanics CalcPathly
PriceFreeFree
Rating5.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 22 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better16.0
Further details — not scored
Size108 MB1 MB
Age rating4+4+
DeveloperTrelleborg Sealing SolutionsJhomar Maravillas

In-app purchases

None

Fluid Mechanics Calc

No in-app purchases

1 purchases

Pathly

One-time1
  • Unlock Unlimited$4.99

Questions

Is Fluid Mechanics Calc free?
Fluid Mechanics Calc is free to download, with no in-app purchases.
Is Pathly free?
Pathly is free to download, with in-app purchases available.
Do Fluid Mechanics Calc or Pathly have ads?
Neither Fluid Mechanics Calc nor Pathly shows ads.
Which is updated more often, Fluid Mechanics Calc or Pathly?
Fluid Mechanics Calc ships an update every 22 months, and Pathly every 2 days. Most recently, Fluid Mechanics Calc was updated on October 12, 2026 and Pathly on October 25, 2026.

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