# SSC Spring Engineering vs Ecostar Tool

The clearest difference is price: SSC Spring Engineering at Free against Ecostar Tool's $99.99. Ecostar Tool's advantage is update cadence (weekly vs every 6 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

SSC Spring Engineering is free to download; Ecostar Tool costs $99.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SSC Spring Engineering ships an update every 6 months, Ecostar Tool weekly. The most recent releases landed on September 29, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | SSC Spring Engineering | Ecostar Tool |
| --- | --- | --- |
| Price | **Free** | $99.99 |
| 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 | **Weekly** |
| Monetization | Free | — |
| Size | 38 MB | 35 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) | [Ecostar](https://appshunter.io/developer/1869167572) |

## 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


### Ecostar Tool

[App page](https://appshunter.io/ios/app/ecostar-tool/id6758130771)

**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 Ecostar Tool free?

Ecostar Tool costs $99.99, with no in-app purchases.

### Do SSC Spring Engineering or Ecostar Tool have ads?

Neither SSC Spring Engineering nor Ecostar Tool shows ads.

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

SSC Spring Engineering ships an update every 6 months, and Ecostar Tool weekly. Most recently, SSC Spring Engineering was updated on September 29, 2026 and Ecostar Tool on October 5, 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.*