# Signal Fire（灼识掌中宝） vs SCM中控

The clearest difference is update cadence: SCM中控 at every 2 weeks against Signal Fire（灼识掌中宝）'s every 2 months. Signal Fire（灼识掌中宝）'s advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Signal Fire（灼识掌中宝） ships an update every 2 months, SCM中控 every 2 weeks. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Signal Fire（灼识掌中宝） | SCM中控 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 45 MB | 4 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SIGNAL FIRE TECHNOLOGY CO., LTD.](https://appshunter.io/developer/1002338331) | [伟威 宋](https://appshunter.io/developer/1891134612) |

## What reviewers say

### Signal Fire（灼识掌中宝）

[App page](https://appshunter.io/ios/app/signal-fire/id1002338332)

This utility app connects to an automatic optical fiber fusion splicer via Wi-Fi. It offers precise control for splicing single-mode and multimode optical fibers, with features like voice broadcast and adjustable splicing modes for enhanced accuracy.

**Highlights:** Wi-Fi connectivity to fusion splicer, Single-mode and multimode fiber splicing, Accurate voice broadcast of fiber face judgment, Normal and high-accuracy splicing modes, Discharge calibration for precise splicing

**In-app purchases:** none


### SCM中控

[App page](https://appshunter.io/ios/app/scm/id6761757092)

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

**In-app purchases:** none


## Frequently asked questions

### Is Signal Fire（灼识掌中宝） free?

Signal Fire（灼识掌中宝） is free to download, with no in-app purchases.

### Is SCM中控 free?

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

### Do Signal Fire（灼识掌中宝） or SCM中控 have ads?

Neither Signal Fire（灼识掌中宝） nor SCM中控 shows ads.

### Which is updated more often, Signal Fire（灼识掌中宝） or SCM中控?

Signal Fire（灼识掌中宝） ships an update every 2 months, and SCM中控 every 2 weeks. Most recently, Signal Fire（灼识掌中宝） was updated on October 19, 2026 and SCM中控 on October 24, 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.*