# 铁塔管控系统 vs Resistor

The clearest difference is ads: 铁塔管控系统 at none against Resistor's shown. 铁塔管控系统 also leads on update cadence (monthly vs every 16 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.

铁塔管控系统 ships an update monthly, Resistor every 16 months. Both last shipped on September 9, 2026.

## The numbers

| Metric | 铁塔管控系统 | Resistor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (3 ratings)](https://appshunter.io/ios/app/resistor-electronics-tools/id6504726625/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 16 months |
| Monetization | — | Ad-supported |
| Size | 37 MB | 22 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fujian Remote Control Technology Co., Ltd](https://appshunter.io/developer/1651228021) | [Anas Abubakar](https://appshunter.io/developer/1581534101) |

## What reviewers say

### 铁塔管控系统

[App page](https://appshunter.io/ios/app/id6443990830)

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

**In-app purchases:** none


### Resistor

[App page](https://appshunter.io/ios/app/resistor-electronics-tools/id6504726625)

This application simplifies electronic circuit calculations with tools for series/parallel resistance, LED current limiting, and three-phase circuit conversions. It also features a resistor color code decoder for quick component identification.

**Highlights:** Series/parallel resistor calculator, LED series resistor calculator, Star-delta and delta-star converters, Resistor color code decoder, Intuitive interface

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

**In-app purchases:** none


## Frequently asked questions

### Is 铁塔管控系统 free?

铁塔管控系统 is free to download, with no in-app purchases.

### Is Resistor free?

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

### Do 铁塔管控系统 or Resistor have ads?

Resistor shows ads; 铁塔管控系统 does not.

### Which is updated more often, 铁塔管控系统 or Resistor?

铁塔管控系统 ships an update monthly, and Resistor every 16 months. Most recently, 铁塔管控系统 was updated on September 9, 2026 and Resistor on September 9, 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.*