# Screw Flight Pro vs Unbend Flat Pattern Calculator

The clearest difference is price: Unbend Flat Pattern Calculator at Free against Screw Flight Pro's $3.99. Unbend Flat Pattern Calculator also leads on update cadence (fortnightly vs every 41 months). Screw Flight Pro's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Unbend Flat Pattern Calculator is free to download; Screw Flight Pro costs $3.99 up front. Unbend Flat Pattern Calculator sells 1 one-off in-app purchase. Screw Flight Pro asks for nothing beyond the download.

Screw Flight Pro ships an update every 41 months, Unbend Flat Pattern Calculator fortnightly. The most recent releases landed on October 17, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Screw Flight Pro | Unbend Flat Pattern Calculator |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 41 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 1 MB | 60 MB |
| Requires iOS | **16.1** | 16.4 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Imran Pinjara](https://appshunter.io/developer/1484488781) | [Omer Faruk BAGCI](https://appshunter.io/developer/1850264269) |

## What reviewers say

### Screw Flight Pro

[App page](https://appshunter.io/ios/app/screw-flight-pro/id1484488782)

Calculate screw flight development for fabrication. This app provides flat pattern sizes for cutting blank plates, essential for screw conveyors and ribbon blenders. It helps determine raw cutting plate dimensions for various process equipment.

**Highlights:** Calculate screw flight development, Flat pattern size for cutting blank plates, Input outside & inside diameter, pitch, thickness, Calculate weight of flight using specific gravity, Determine raw cutting plate size, Includes radial cut element

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

**In-app purchases:** none


### Unbend Flat Pattern Calculator

[App page](https://appshunter.io/ios/app/unbend-flat-pattern-calculator/id6797460542)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unbend Pro Unlock | $14.99 | one-time |


## Frequently asked questions

### Is Screw Flight Pro free?

Screw Flight Pro costs $3.99, with no in-app purchases.

### Is Unbend Flat Pattern Calculator free?

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

### Do Screw Flight Pro or Unbend Flat Pattern Calculator have ads?

Unbend Flat Pattern Calculator shows ads; Screw Flight Pro does not.

### Which is updated more often, Screw Flight Pro or Unbend Flat Pattern Calculator?

Screw Flight Pro ships an update every 41 months, and Unbend Flat Pattern Calculator fortnightly. Most recently, Screw Flight Pro was updated on October 17, 2026 and Unbend Flat Pattern Calculator on October 18, 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.*