# SSC Spring Engineering vs Won

SSC Spring Engineering and Won are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SSC Spring Engineering ships an update every 6 months, Won every 4 months. The most recent releases landed on September 29, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | SSC Spring Engineering | Won |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (26 ratings)](https://appshunter.io/ios/app/ssc-spring-engineering/id1438112209/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 38 MB | 27 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Service Spring Corporation](https://appshunter.io/developer/342694497) | [Overhead Door Corporation](https://appshunter.io/developer/971795580) |

## What reviewers say

### SSC Spring Engineering

[App page](https://appshunter.io/ios/app/ssc-spring-engineering/id1438112209)

This utility app assists with spring engineering calculations, including conversions, new designs, and comparisons. It helps determine spring and drum specifications for various applications, such as rolling steel doors, and calculates lifting capacities.

**Highlights:** Spring conversion, New spring engineering, Drum specification comparison, IPPT spring calculation, Rolling steel door spring design, Approximate pull calculation, Maximum lift capacity determination

**Features:** macOS Compatibility

**In-app purchases:** none


### Won

[App page](https://appshunter.io/ios/app/won-door-programmer/id1591059282)

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

**In-app purchases:** none


## Frequently asked questions

### Is SSC Spring Engineering free?

SSC Spring Engineering is free to download, with no in-app purchases.

### Is Won free?

Won is free to download, with no in-app purchases.

### Do SSC Spring Engineering or Won have ads?

Neither SSC Spring Engineering nor Won shows ads.

### Which is updated more often, SSC Spring Engineering or Won?

SSC Spring Engineering ships an update every 6 months, and Won every 4 months. Most recently, SSC Spring Engineering was updated on September 29, 2026 and Won on October 4, 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.*