# Spiral Engineering vs 首固智控

The clearest difference is ads: Spiral Engineering at none against 首固智控's shown. Spiral Engineering also leads on update cadence (every 5 weeks vs every 3 months). On price, in-app purchases, device support and iOS requirement 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, 首固智控 every 3 months. The most recent releases landed on October 12, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Spiral Engineering | 首固智控 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/spiral-engineering/id1576156198/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Free | — |
| Size | 32 MB | 67 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Litetrace Inc](https://appshunter.io/developer/1685148777) | [铱塔(深圳)科技有限公司](https://appshunter.io/developer/1698031791) |

## 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


### 首固智控

[App page](https://appshunter.io/ios/app/id6738110976)

**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 首固智控 free?

首固智控 is free to download, with no in-app purchases.

### Do Spiral Engineering or 首固智控 have ads?

首固智控 shows ads; Spiral Engineering does not.

### Which is updated more often, Spiral Engineering or 首固智控?

Spiral Engineering ships an update every 5 weeks, and 首固智控 every 3 months. Most recently, Spiral Engineering was updated on October 12, 2026 and 首固智控 on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*