# Resistor Tools vs Resistor AI Calculator

The clearest difference is review sentiment: Resistor Tools at 75% against Resistor AI Calculator's 0%. Resistor Tools also leads on rating (5.0 vs 3.6) and ads (none vs shown). Resistor AI Calculator's advantage is in-app purchases (none vs 1). On price, ratings volume and device support there is nothing between them.

Both are free to download. Resistor Tools sells 1 one-off in-app purchase. Resistor AI Calculator asks for nothing beyond the download.

Resistor Tools holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 10 and 5 respectively. Written reviews point the same way: 75% of Resistor Tools's written reviews are positive against 0% of Resistor AI Calculator's.

Resistor Tools ships an update every 2 months, Resistor AI Calculator every 15 months. The most recent releases landed on October 21, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Resistor Tools | Resistor AI Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (10 ratings)](https://appshunter.io/ios/app/resistor-tools/id826045228/reviews)** | [3.6 (5 ratings)](https://appshunter.io/ios/app/resistor-ai-calculator/id1587462977/reviews) |
| Number of ratings | **10** | 5 |
| Positive reviews | **75.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 15 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 4 MB | 71 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Daichi Takigawa](https://appshunter.io/developer/1569940550) |

## 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 |


### Resistor AI Calculator

[App page](https://appshunter.io/ios/app/resistor-ai-calculator/id1587462977)

Point your phone's camera at a resistor to instantly identify its value. Currently supports 4-band carbon film resistors with a 5% tolerance.

**Highlights:** Real-time resistor detection, Automatic resistance calculation, Supports 4-band carbon film resistors, 5% margin of error detection, Uses smartphone camera

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Resistor Tools free?

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

### Is Resistor AI Calculator free?

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

### Which has better reviews, Resistor Tools or Resistor AI Calculator?

Resistor Tools is rated higher. Resistor Tools averages 5.0 out of 5 from 10 ratings, while Resistor AI Calculator averages 3.6 from 5 ratings.

### Do Resistor Tools or Resistor AI Calculator have ads?

Resistor AI Calculator shows ads; Resistor Tools does not.

### Which is updated more often, Resistor Tools or Resistor AI Calculator?

Resistor Tools ships an update every 2 months, and Resistor AI Calculator every 15 months. Most recently, Resistor Tools was updated on October 21, 2026 and Resistor AI Calculator on October 15, 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.*