# Pipe Fitting & ASME Toolbox vs FlowLine Isometric

The clearest difference is rating: Pipe Fitting & ASME Toolbox at 4.9 against FlowLine Isometric's 4.0. Pipe Fitting & ASME Toolbox also leads on iOS requirement (13.0 vs 26.0). FlowLine Isometric's advantage is in-app purchases (none vs 1) and update cadence (every 6 weeks vs every 4 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Pipe Fitting & ASME Toolbox sells 1 one-off in-app purchase. FlowLine Isometric asks for nothing beyond the download.

Pipe Fitting & ASME Toolbox holds the better App Store score, 4.9 against 4.0. Both are backed by a comparable volume of ratings — 21 and 11 respectively.

Pipe Fitting & ASME Toolbox ships an update every 4 months, FlowLine Isometric every 6 weeks. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Pipe Fitting & ASME Toolbox | FlowLine Isometric |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (21 ratings)](https://appshunter.io/ios/app/pipe-fitting-and-asme-toolbox/id6752763143/reviews)** | [4.0 (11 ratings)](https://appshunter.io/ios/app/flowline-isometric/id6762237039/reviews) |
| Number of ratings | **21** | 11 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 210 MB | 23 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) | [Joshua Parkin](https://appshunter.io/developer/1495725832) |

## What reviewers say

### Pipe Fitting & ASME Toolbox

[App page](https://appshunter.io/ios/app/pipe-fitting-and-asme-toolbox/id6752763143)

Access essential piping engineering data, standards, and smart calculators for professionals and students. Covers ASME standards, pipe and flange dimensions, fitting details, and valve sizes. Includes daily tips and quizzes to enhance knowledge.

**Highlights:** Engineering calculators, Piping data and standards, Pipe dimensions, Flange dimensions, Fitting dimensions, Valve dimensions, Daily tips and quiz

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $9.99 | one-time |


### FlowLine Isometric

[App page](https://appshunter.io/ios/app/flowline-isometric/id6762237039)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Pipe Fitting & ASME Toolbox free?

Pipe Fitting & ASME Toolbox 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 Fitting & ASME Toolbox or FlowLine Isometric?

Pipe Fitting & ASME Toolbox is rated higher. Pipe Fitting & ASME Toolbox averages 4.9 out of 5 from 21 ratings, while FlowLine Isometric averages 4.0 from 11 ratings.

### Do Pipe Fitting & ASME Toolbox or FlowLine Isometric have ads?

Neither Pipe Fitting & ASME Toolbox nor FlowLine Isometric shows ads.

### Which is updated more often, Pipe Fitting & ASME Toolbox or FlowLine Isometric?

Pipe Fitting & ASME Toolbox ships an update every 4 months, and FlowLine Isometric every 6 weeks. Most recently, Pipe Fitting & ASME Toolbox was updated on November 3, 2026 and FlowLine Isometric on October 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*