# Resistor Tools vs CarLock

The clearest difference is in-app purchases: CarLock at none against Resistor Tools's 1. CarLock also leads on iOS requirement (6.0 vs 12.0). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | Resistor Tools | CarLock |
| --- | --- | --- |
| 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 | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 18 MB |
| Requires iOS | 12.0 | **6.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Alexander Presnyakov](https://appshunter.io/developer/1044275653) |

## 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 |


### CarLock

[App page](https://appshunter.io/ios/app/carlock/id1068072336)

**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 CarLock free?

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

### Do Resistor Tools or CarLock have ads?

Neither Resistor Tools nor CarLock 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.*