# SSC Spring Engineering vs Napoleon/Lynx Spring Calc

The clearest difference is rating: Napoleon/Lynx Spring Calc at 5.0 against SSC Spring Engineering's 4.6. SSC Spring Engineering's advantage is ratings volume (26 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Napoleon/Lynx Spring Calc holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: SSC Spring Engineering has 26 ratings behind it against 1, so its average is the more settled of the two.

SSC Spring Engineering ships an update every 6 months, Napoleon/Lynx Spring Calc every 7 months. The most recent releases landed on September 29, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | SSC Spring Engineering | Napoleon/Lynx Spring Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (26 ratings)](https://appshunter.io/ios/app/ssc-spring-engineering/id1438112209/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/napoleonlynx-spring-calc/id6737538790/reviews)** |
| Number of ratings | **26** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 38 MB | 23 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Service Spring Corporation](https://appshunter.io/developer/342694497) | [Napoleon Spring Works](https://appshunter.io/developer/1771529934) |

## 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


### Napoleon/Lynx Spring Calc

[App page](https://appshunter.io/ios/app/napoleonlynx-spring-calc/id6737538790)

This utility app simplifies garage door torsion spring calculations for single and duplex assemblies. It supports various lift types and drums, allowing users to save and share their calculations. Connect with local sales representatives for parts and assistance.

**Highlights:** Calculates torsion springs for single/duplex assemblies, Supports various lift types and drums, Save calculations locally, Share calculations with other apps, Direct contact for sales representatives

**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 Napoleon/Lynx Spring Calc free?

Napoleon/Lynx Spring Calc is free to download, with no in-app purchases.

### Which has better reviews, SSC Spring Engineering or Napoleon/Lynx Spring Calc?

Napoleon/Lynx Spring Calc is rated higher. SSC Spring Engineering averages 4.6 out of 5 from 26 ratings, while Napoleon/Lynx Spring Calc averages 5.0 from 1 ratings.

### Do SSC Spring Engineering or Napoleon/Lynx Spring Calc have ads?

Neither SSC Spring Engineering nor Napoleon/Lynx Spring Calc shows ads.

### Which is updated more often, SSC Spring Engineering or Napoleon/Lynx Spring Calc?

SSC Spring Engineering ships an update every 6 months, and Napoleon/Lynx Spring Calc every 7 months. Most recently, SSC Spring Engineering was updated on September 29, 2026 and Napoleon/Lynx Spring Calc on October 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.*