# Screw Flight Calculator vs iYield

The clearest difference is rating: iYield at 5.0 against Screw Flight Calculator's 1.0. iYield also leads on update cadence (every 8 days vs every 17 months). Screw Flight Calculator's advantage is price ($1.99 vs $2.99) and iOS requirement (13.0 vs 16.1). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Screw Flight Calculator costs $1.99 and iYield $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iYield holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Screw Flight Calculator ships an update every 17 months, iYield every 8 days. The most recent releases landed on August 19, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Screw Flight Calculator | iYield |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/screw-flight-calculator/id1664794765/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iyield/id6444737177/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 8 days** |
| Monetization | Paid | Paid |
| Size | 44 MB | 5 MB |
| Requires iOS | **13.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) | [Scott Mygind](https://appshunter.io/developer/1656533344) |

## What reviewers say

### Screw Flight Calculator

[App page](https://appshunter.io/ios/app/screw-flight-calculator/id1664794765)

Calculate the flat pattern size for cutting blank plates for screw flight development and fabrication. This tool is essential for creating screw conveyors, ribbon blenders, and other process equipment.

**Highlights:** Calculate flat pattern size, Input outside & inside diameter, Input pitch and material thickness, Calculate weight of material, Includes radial cut element

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

**In-app purchases:** none


### iYield

[App page](https://appshunter.io/ios/app/iyield/id6444737177)

Calculate corn and soybean yields using key agricultural metrics. Input moisture, weight, length, and row spacing to get an estimated harvest.

**Highlights:** Corn yield estimation, Soybean yield estimation, Moisture input, Weight input, Row spacing input

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Screw Flight Calculator free?

Screw Flight Calculator costs $1.99, with no in-app purchases.

### Is iYield free?

iYield costs $2.99, with no in-app purchases.

### Which has better reviews, Screw Flight Calculator or iYield?

iYield is rated higher. Screw Flight Calculator averages 1.0 out of 5 from 1 ratings, while iYield averages 5.0 from 1 ratings.

### Do Screw Flight Calculator or iYield have ads?

Neither Screw Flight Calculator nor iYield shows ads.

### Which is updated more often, Screw Flight Calculator or iYield?

Screw Flight Calculator ships an update every 17 months, and iYield every 8 days. Most recently, Screw Flight Calculator was updated on August 19, 2026 and iYield on June 1, 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.*