# Read A Res vs Resistor

The clearest difference is in-app purchases: Resistor at none against Read A Res's 1. Resistor also leads on ads (none vs shown) and rating (4.9 vs 4.4). Read A Res's advantage is update cadence (every 2 months vs every 9 months) and iOS requirement (15.6 vs 26.0). On price, ratings volume and device support there is nothing between them.

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

Resistor holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 34 and 19 respectively.

Read A Res ships an update every 2 months, Resistor every 9 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Read A Res | Resistor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (34 ratings)](https://appshunter.io/ios/app/read-a-res/id1437744283/reviews) | **[4.9 (19 ratings)](https://appshunter.io/ios/app/resistor-converter/id6446839759/reviews)** |
| Number of ratings | **34** | 19 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 9 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 18 MB | 8 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Enes Akkus](https://appshunter.io/developer/1416782412) | [Gerhard Lentschik](https://appshunter.io/developer/629988041) |

## What reviewers say

### Read A Res

[App page](https://appshunter.io/ios/app/read-a-res/id1437744283)

Easily read and convert electronic component resistances. Input color codes or SMD values, and the application handles the rest. Offers a straightforward interface for quick calculations.

**Highlights:** Resistance reading, Resistance conversion, Color code input, SMD value input, Simple interface

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Resistor

[App page](https://appshunter.io/ios/app/resistor-converter/id6446839759)

Quickly calculate resistor values from color bands or SMD codes, and vice versa. This tool is ideal for electronics enthusiasts, students, and DIYers working with 4, 5, or 6-band resistors and various SMD codes. It functions offline and requires no registration.

**Highlights:** Calculate resistor values from color bands, Convert resistor values to color bands, Supports 4, 5, and 6-band resistors, Handles SMD codes (EIA-3, EIA-4, EIA-96), Works offline, No registration required

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

**In-app purchases:** none


## Frequently asked questions

### Is Read A Res free?

Read A Res is free to download, with in-app purchases available.

### Is Resistor free?

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

### Which has better reviews, Read A Res or Resistor?

Resistor is rated higher. Read A Res averages 4.4 out of 5 from 34 ratings, while Resistor averages 4.9 from 19 ratings.

### Do Read A Res or Resistor have ads?

Read A Res shows ads; Resistor does not.

### Which is updated more often, Read A Res or Resistor?

Read A Res ships an update every 2 months, and Resistor every 9 months. Most recently, Read A Res was updated on October 24, 2026 and Resistor 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.*