Comparison

Resistor Plus vs Umferðarmerkin

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Resistor Plus

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
Read full description

Resistor Calculator is the essential tool for electronics engineers, hobbyists, makers, and students. Instantly decode resistor color bands, calculate circuit values, and look up standard resistor values — all in one app. RESISTOR COLOR CODE CALCULATOR • Support for 4-band, 5-band, and 6-band resistors • Tap color bands on a realistic resistor graphic to read values instantly • View resistance, tolerance, min/max range, and temperature coefficient • Intuitive color picker with all standard EIA color codes REVERSE LOOKUP • Enter a resistance value and get the matching color band combination • Find the closest standard value from E-series tables • Perfect for designing circuits and selecting components SERIES & PARALLEL CALCULATOR • Calculate total resistance for resistors in series or parallel • Add unlimited resistors with engineering notation input (e.g. 4.7k, 2.2M) • See live results with formula reference VOLTAGE DIVIDER • Solve for output voltage (Vout) or unknown resistor (R2) • Interactive circuit diagram updates in real time • Supports engineering notation for quick input E-SERIES REFERENCE LIBRARY • Browse standard resistor values from E12, E24, E48, E96, and E192 series • Search and filter values instantly • Tap to copy any value to clipboard DESIGNED FOR ENGINEERS • Clean, distraction-free interface • Works on iPhone and iPad • No ads, no subscriptions, no internet required • Haptic feedback for a responsive experience Whether you are building your first LED circuit or designing professional PCBs, Resistor Calculator Pro gives you fast, accurate answers right on your device. Download now and keep the most useful resistor tool in your pocket. Resistor Parameters: Band Digit Black - 0 Brown - 1 Red - 2 Orange - 3 Yellow - 4 Green - 5 Blue - 6 Violet - 7 Grey - 8 White - 9 Band Multiplier Black × 1 Ω Brown × 10 Ω Red × 100 Ω Orange × 1 kΩ Yellow × 10 kΩ Green × 100 kΩ Blue × 1 MΩ Violet × 10 MΩ Gold × 0.1 Ω Silver × 0.01 Ω Band Tolerance Brown - 1% Red - 2% Gold - 5% Silver - 10% A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, divide voltages, bias active elements, and terminate transmission lines, among other uses. A resistor opposes the flow of electrical current; the higher the value of the resistor, the more it opposes the current flow. Values are given in ohms. Thank you for your support! Visit nitrio.com for more apps for your iOS devices.

About

Umferðarmerkin

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
Read full description

Lærðu öll umferðarmerkin á einum stað. Einfalt umferðarmerkjapróf þar sem þú getur áttað þig á hversu vel þú þekkir merkin. Umferðarmerkin er app þar sem þú getur skoðað umferðarmerki, gátskildi og stikur á einfaldan og aðgengilegan máta.

Screenshots

Resistor Plus4 screens
Umferðarmerkin4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

Resistor Plus ships an update every 20 months, Umferðarmerkin every 9 days. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.

Scorecard5 real differences · 5 level
Resistor Plus versus Umferðarmerkin: the parameters behind the verdict, then further details
ParameterResistor PlusUmferðarmerkin
Price$2.99Free — better
Rating—5.0 (2 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings—2 — better
Update frequencyEvery 20 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.614.0.0 — better
Further details — not scored
Size1 MB41 MB
Age rating4+4+
DeveloperNitrioLoftfarid

Customer experience

Resistor Plus

Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Umferðarmerkin

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Resistor Plus

No in-app purchases

None

Umferðarmerkin

No in-app purchases

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 1, 2026.

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