# Resistor Tools vs 計算工坊

Resistor Tools and 計算工坊 are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Resistor Tools sells 1 one-off in-app purchase and 計算工坊 sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Resistor Tools | 計算工坊 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (10 ratings)](https://appshunter.io/ios/app/resistor-tools/id826045228/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 26 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Pang ChingNan](https://appshunter.io/developer/1896741753) |

## What reviewers say

### Resistor Tools

[App page](https://appshunter.io/ios/app/resistor-tools/id826045228)

This utility app provides a suite of tools for calculating and determining resistor values. It assists hobbyists and engineers with series, parallel, and voltage divider calculations, as well as inverting amplifier gain.

**Highlights:** Series and parallel resistor calculation, Resistor combination finder, Voltage divider ratio and value calculation, Inverting amplifier gain calculation, Save combinations to CSV

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock pro feature | $0.99 | one-time |


### 計算工坊

[App page](https://appshunter.io/ios/app/id6780859093)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Energy Calculation. | $1.99 | one-time |
| Unlock ETF Dividend Calculator | $1.99 | one-time |
| Unlock Team Budget Sharing | $1.99 | one-time |
| Unlock Loan Repayment. | $1.99 | one-time |
| Unlock Engineering Calculations | $1.99 | one-time |
| Unlock Unit Conversion | $1.99 | one-time |
| Unlock Power & Information | $1.99 | one-time |
| Unlock the Chemistry Workshop | $1.99 | one-time |
| Unlock the Pro version | $9.99 | one-time |


## Frequently asked questions

### Is Resistor Tools free?

Resistor Tools is free to download, with in-app purchases available.

### Is 計算工坊 free?

計算工坊 is free to download, with in-app purchases available.

### Do Resistor Tools or 計算工坊 have ads?

Neither Resistor Tools nor 計算工坊 shows ads.

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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.*