# Screw Flight vs Han Keyboard

The clearest difference is price: Han Keyboard at Free against Screw Flight's $2.99. Han Keyboard also leads on update cadence (every 10 days vs every 48 months). Screw Flight's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

Han Keyboard is free to download; Screw Flight costs $2.99 up front. Han Keyboard sells 3 one-off in-app purchases. Screw Flight asks for nothing beyond the download.

Screw Flight ships an update every 48 months, Han Keyboard every 10 days. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Screw Flight | Han Keyboard |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/screw-flight/id1489672208/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 10 days** |
| Monetization | Paid | — |
| Size | 1 MB | 28 MB |
| Requires iOS | 16.1 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Imran Pinjara](https://appshunter.io/developer/1484488781) | [Min Seon Kim](https://appshunter.io/developer/1832969908) |

## What reviewers say

### Screw Flight

[App page](https://appshunter.io/ios/app/screw-flight/id1489672208)

This app calculates the flat pattern size for cutting blank plates for screw flight development and fabrication. It's useful for those involved in manufacturing screw conveyors, ribbon blenders, and other process equipment.

**Highlights:** Calculate flat pattern size for screw flight, Input outside & inside diameter, pitch, thickness, Select material specific gravity for weight calculation, Output development outside & inside diameter, Includes radial cut element for development, Useful for process equipment fabrication

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

**In-app purchases:** none


### Han Keyboard

[App page](https://appshunter.io/ios/app/han-keyboard/id6749943965)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 작은 팁 | $1.49 | one-time |
| 중간 팁 | $4.99 | one-time |
| 넉넉한 팁 | $9.99 | one-time |


## Frequently asked questions

### Is Screw Flight free?

Screw Flight costs $2.99, with no in-app purchases.

### Is Han Keyboard free?

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

### Do Screw Flight or Han Keyboard have ads?

Neither Screw Flight nor Han Keyboard shows ads.

### Which is updated more often, Screw Flight or Han Keyboard?

Screw Flight ships an update every 48 months, and Han Keyboard every 10 days. Most recently, Screw Flight was updated on October 14, 2026 and Han Keyboard on October 11, 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.*