# Spiral Engineering vs Strong Lumen

The clearest difference is iOS requirement: Spiral Engineering at 12.0 against Strong Lumen's 15.6. 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.

Spiral Engineering ships an update every 5 weeks, Strong Lumen monthly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Spiral Engineering | Strong Lumen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/spiral-engineering/id1576156198/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free | — |
| Size | 32 MB | 32 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Litetrace Inc](https://appshunter.io/developer/1685148777) | [Strong Lumen Opto Co., Ltd.](https://appshunter.io/developer/1847578322) |

## What reviewers say

### Spiral Engineering

[App page](https://appshunter.io/ios/app/spiral-engineering/id1576156198)

This utility app allows for firmware over-the-air updates and professional parameter adjustments for connected devices. Users can fine-tune settings such as PWM, high and low trim, fading time, and auto brightness levels.

**Highlights:** Firmware OTA updates, Professional parameter setting, PWM adjustment, High and low trim control, Fading time configuration, Auto brightness level setting

**Features:** macOS Compatibility

**In-app purchases:** none


### Strong Lumen

[App page](https://appshunter.io/ios/app/strong-lumen/id6754271831)

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

**In-app purchases:** none


## Frequently asked questions

### Is Spiral Engineering free?

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

### Is Strong Lumen free?

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

### Do Spiral Engineering or Strong Lumen have ads?

Neither Spiral Engineering nor Strong Lumen shows ads.

### Which is updated more often, Spiral Engineering or Strong Lumen?

Spiral Engineering ships an update every 5 weeks, and Strong Lumen monthly. Most recently, Spiral Engineering was updated on October 24, 2026 and Strong Lumen on October 25, 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.*