# CDSiPipe vs Flat Pattern Bend Calculator

The clearest difference is review sentiment: CDSiPipe at 100% against Flat Pattern Bend Calculator's 47%. CDSiPipe also leads on in-app purchases (none vs 6) and ads (none vs shown). Flat Pattern Bend Calculator's advantage is ratings volume (151 vs 1) and update cadence (every 2 months vs every 4 months). On price and device support there is nothing between them.

Both are free to download. Flat Pattern Bend Calculator sells 6 in-app purchases, starting at $4.99 per 7 days. CDSiPipe asks for nothing beyond the download.

CDSiPipe holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Flat Pattern Bend Calculator has 151 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of CDSiPipe's written reviews are positive against 47% of Flat Pattern Bend Calculator's.

CDSiPipe ships an update every 4 months, Flat Pattern Bend Calculator every 2 months. The most recent releases landed on September 22, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | CDSiPipe | Flat Pattern Bend Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cdsipipe/id665877570/reviews)** | [4.6 (151 ratings)](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922/reviews) |
| Number of ratings | 1 | **151** |
| Positive reviews | **100.0% of reviews** | 46.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 315 MB | 61 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Charles D. Sheehy, Inc.](https://appshunter.io/developer/665877574) | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) |

## What reviewers say

### CDSiPipe

[App page](https://appshunter.io/ios/app/cdsipipe/id665877570)

This app serves as a comprehensive reference toolbox for process piping, HVAC, and MEP professionals. It provides detailed information on steel pipe and valve specifications, including dimensions, pressure ratings, coatings, and finishes. Users can quickly access data through an intuitive interface with picker wheels and drop-down menus.

**Highlights:** Steel pipe specifications (OD, ID, weight, volume, wall thickness), Valve pressure ratings and dimensions, Information on pipe coatings, finishes, and types, Explanations of valve types (Butterfly, Gate, Check, Globe, Ball), Glossaries of piping industry terms and abbreviations, FAQ sections for pipe and valve categories

**Features:** macOS Compatibility

**In-app purchases:** none


### Flat Pattern Bend Calculator

[App page](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922)

This app provides accurate flat pattern layouts for complex sheet metal shapes and transitions. It simplifies calculations for cones, frustums, cylinders, and various transition pieces, saving time and reducing errors in fabrication projects.

**Highlights:** Cone calculations, Frustum calculations, Truncated cylinder layouts, Bend allowance calculations, Transition piece generation, Complex shape patterns

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| MONTHLY UNLOCK | $6.99 | per month |
| Offer : Yearly Access | $29.99 | per year |
| Yearly Access | $39.99 | per year |
| YEARLY UNLOCK | $39.99 | per year |
| LIFETIME UNLOCK | $69.99 | one-time |


## Frequently asked questions

### Is CDSiPipe free?

CDSiPipe is free to download, with no in-app purchases.

### Is Flat Pattern Bend Calculator free?

Flat Pattern Bend Calculator is free to download, with in-app purchases available.

### Which has better reviews, CDSiPipe or Flat Pattern Bend Calculator?

CDSiPipe is rated higher. CDSiPipe averages 5.0 out of 5 from 1 ratings, while Flat Pattern Bend Calculator averages 4.6 from 151 ratings.

### Do CDSiPipe or Flat Pattern Bend Calculator have ads?

Flat Pattern Bend Calculator shows ads; CDSiPipe does not.

### Which is updated more often, CDSiPipe or Flat Pattern Bend Calculator?

CDSiPipe ships an update every 4 months, and Flat Pattern Bend Calculator every 2 months. Most recently, CDSiPipe was updated on September 22, 2026 and Flat Pattern Bend Calculator on October 4, 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.*