# Resistor Plus vs Umferðarmerkin

The clearest difference is review sentiment: Umferðarmerkin at 100% against Resistor Plus's 0%. Umferðarmerkin also leads on price (Free vs $2.99) and update cadence (every 9 days vs every 20 months). On ads, in-app purchases and device support there is nothing between them.

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

Resistor Plus ships an update every 20 months, Umferðarmerkin every 9 days. The most recent releases landed on October 2, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Resistor Plus | Umferðarmerkin |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/umferarmerkin/id1260215256/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 9 days** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 41 MB |
| Requires iOS | 16.6 | **14.0.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Loftfarid](https://appshunter.io/developer/1191288271) |

## What reviewers say

### Resistor Plus

[App page](https://appshunter.io/ios/app/resistor-plus/id500615686)

Easily calculate resistor values and tolerance using color codes. Simply select the colors for each band, and the app instantly displays the resistance in ohms. Save your results with screenshots for future reference.

**Highlights:** Resistor color code calculation, Tolerance calculation, Instant results display, Copy result functionality, Screenshot capability, Works on iPhone and iPad, Ad-free and private

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

**In-app purchases:** none


### Umferðarmerkin

[App page](https://appshunter.io/ios/app/umferarmerkin/id1260215256)

Learn all about traffic signs in one place with a simple quiz to test your knowledge. Browse road signs, warning signs, and markers in an easy-to-access format.

**Highlights:** Comprehensive traffic sign database, Interactive knowledge quiz, Easy browsing of signs and markers, Accessible learning format, Tests understanding of road signs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Resistor Plus free?

Resistor Plus costs $2.99, with no in-app purchases.

### Is Umferðarmerkin free?

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

### Do Resistor Plus or Umferðarmerkin have ads?

Neither Resistor Plus nor Umferðarmerkin shows ads.

### Which is updated more often, Resistor Plus or Umferðarmerkin?

Resistor Plus ships an update every 20 months, and Umferðarmerkin every 9 days. Most recently, Resistor Plus was updated on October 2, 2026 and Umferðarmerkin on October 16, 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.*