# Elbow vs Unbend Flat Pattern Calculator

The clearest difference is update cadence: Unbend Flat Pattern Calculator at fortnightly against Elbow's every 4 months. Elbow's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.4). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Elbow sells 2 in-app purchases, starting at $4.99 per 7 days and Unbend Flat Pattern Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

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

## The numbers

| Metric | Elbow | Unbend Flat Pattern Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/elbow-flat-pattern/id6471258565/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 58 MB | 57 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) | [Omer Faruk BAGCI](https://appshunter.io/developer/1850264269) |

## What reviewers say

### Elbow

[App page](https://appshunter.io/ios/app/elbow-flat-pattern/id6471258565)

This tool simplifies the creation of accurate flat patterns for elbow fittings in sheet metal fabrication, HVAC, and piping. Input key parameters like angle and dimensions to instantly generate precise calculations for cutting and shaping materials, saving time and reducing errors.

**Highlights:** Calculate inner arc length, Determine elbow angle and cutting dimensions, Support custom angle inputs, Accurate flat pattern development, Quick and reliable results

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Monthly | $9.99 | per month |


### 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 Elbow free?

Elbow is free to download, with in-app purchases available.

### Is Unbend Flat Pattern Calculator free?

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

### Do Elbow or Unbend Flat Pattern Calculator have ads?

Neither Elbow nor Unbend Flat Pattern Calculator shows ads.

### Which is updated more often, Elbow or Unbend Flat Pattern Calculator?

Elbow ships an update every 4 months, and Unbend Flat Pattern Calculator fortnightly. Most recently, Elbow was updated on September 22, 2026 and Unbend Flat Pattern Calculator on October 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.*