# iAttenuation vs Resistor color codes calc

The clearest difference is price: Resistor color codes calc at Free against iAttenuation's $2.99. Resistor color codes calc also leads on update cadence (every 2 months vs every 69 months). iAttenuation's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

Resistor color codes calc is free to download; iAttenuation costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iAttenuation ships an update every 69 months, Resistor color codes calc every 2 months. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | iAttenuation | Resistor color codes calc |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/iattenuation/id305626528/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 69 months | **Every 2 months** |
| Monetization | Paid | **Ad-supported** |
| Size | 1 MB | 10 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### iAttenuation

[App page](https://appshunter.io/ios/app/iattenuation/id305626528)

This app calculates resistor values for various passive attenuator networks. It supports T, Pi, H, O, and Minimum Loss Pad configurations, allowing users to input impedance and desired attenuation. It can also adjust resistor values to standard tolerances.

**Highlights:** Calculates resistor values for passive attenuator networks, Supports Tee, Pi, H, O, and Minimum Loss Pad configurations, Input and output impedance calculation, Desired attenuation input, Adjusts resistor values to standard tolerances (1%, 5%, 10%)

**Features:** macOS Compatibility

**In-app purchases:** none


### Resistor color codes calc

[App page](https://appshunter.io/ios/app/resistor-color-codes-calc/id6443917752)

Instantly decode resistor color bands to find resistance, tolerance, and TCR. Also calculates series/parallel resistance and voltage dividers. Supports E-series validation and multiple languages.

**Highlights:** 3- to 6-band color code support, Resistance, tolerance, and TCR calculation, Value to color code conversion, E-series validation, Series and parallel resistor calculation, Voltage divider calculation

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

**In-app purchases:** none


## Frequently asked questions

### Is iAttenuation free?

iAttenuation costs $2.99, with no in-app purchases.

### Is Resistor color codes calc free?

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

### Do iAttenuation or Resistor color codes calc have ads?

Resistor color codes calc shows ads; iAttenuation does not.

### Which is updated more often, iAttenuation or Resistor color codes calc?

iAttenuation ships an update every 69 months, and Resistor color codes calc every 2 months. Most recently, iAttenuation was updated on September 18, 2026 and Resistor color codes calc on September 17, 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.*