# Flat Pattern Bend Calculator vs HDD Report Builder

The clearest difference is in-app purchases: HDD Report Builder at none against Flat Pattern Bend Calculator's 6. HDD Report Builder also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price, update cadence 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. HDD Report Builder asks for nothing beyond the download.

Flat Pattern Bend Calculator ships an update every 2 months, HDD Report Builder every 5 weeks. The most recent releases landed on September 24, 2026 and June 2, 2026 respectively.

## The numbers

| Metric | Flat Pattern Bend Calculator | HDD Report Builder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (151 ratings)](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922/reviews)** | — |
| Number of ratings | **151** | — |
| Positive reviews | 45.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 80 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) | [Einlogica Solutions Private Limited](https://appshunter.io/developer/1762129938) |

## What reviewers say

### 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 |


### HDD Report Builder

[App page](https://appshunter.io/ios/app/hdd-report-builder/id6753929129)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flat Pattern Bend Calculator free?

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

### Is HDD Report Builder free?

HDD Report Builder is free to download, with no in-app purchases.

### Do Flat Pattern Bend Calculator or HDD Report Builder have ads?

Flat Pattern Bend Calculator shows ads; HDD Report Builder does not.

### Which is updated more often, Flat Pattern Bend Calculator or HDD Report Builder?

Flat Pattern Bend Calculator ships an update every 2 months, and HDD Report Builder every 5 weeks. Most recently, Flat Pattern Bend Calculator was updated on September 24, 2026 and HDD Report Builder on June 2, 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.*