# Napoleon/Lynx Spring Calc vs SpringCalc

The clearest difference is ads: Napoleon/Lynx Spring Calc at none against SpringCalc's shown. Napoleon/Lynx Spring Calc also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). SpringCalc's advantage is update cadence (every 2 weeks vs every 7 months). On price 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 ships an update every 7 months, SpringCalc every 2 weeks. The most recent releases landed on October 17, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Napoleon/Lynx Spring Calc | SpringCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/napoleonlynx-spring-calc/id6737538790/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 23 MB | 7 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Napoleon Spring Works](https://appshunter.io/developer/1771529934) | [Sui Fai Law](https://appshunter.io/developer/1889201616) |

## What reviewers say

### 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


### SpringCalc

[App page](https://appshunter.io/ios/app/springcalc/id6770431388)

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

**In-app purchases:** none


## Frequently asked questions

### Is Napoleon/Lynx Spring Calc free?

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

### Is SpringCalc free?

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

### Do Napoleon/Lynx Spring Calc or SpringCalc have ads?

SpringCalc shows ads; Napoleon/Lynx Spring Calc does not.

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

Napoleon/Lynx Spring Calc ships an update every 7 months, and SpringCalc every 2 weeks. Most recently, Napoleon/Lynx Spring Calc was updated on October 17, 2026 and SpringCalc on October 28, 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.*