Resistor Plus vs Amatrol eLearning
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Resistor color code calculation
- Tolerance calculation
- Instant results display
- Copy result functionality
- Screenshot capability
- Works on iPhone and iPad
- Ad-free and private
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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.
Amatrol eLearning
Access a vast library of technical training courses on your mobile device. This comprehensive curriculum covers foundational to advanced industrial topics with interactive multimedia content designed for various learning styles. Requires an active subscription through an organization or school.
- Access technical training curriculum
- Hundreds of courses available
- Thousands of hours of training
- Covers basic to advanced industrial topics
- Competency-based instructional design
- Interactive multimedia format
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The Amatrol app allows learners to access the world’s premier technical training curriculum using their mobile devices if they have an active subscription from their organization or school. Amatrol eLearning represents the most comprehensive, complete technical training solution available today. The Amatrol library consists of hundreds of courses with thousands of hours of in-depth technical training, and it’s always expanding. Amatrol’s technical training eLearning covers topics like basic electrical, fluid power, and mechanical to advanced topics such as programmable logic controllers, industrial robots, and Industry 4.0 practices. Amatrol eLearning features a competency-based instructional design that focuses on skill development directly related to the core competencies relevant to modern industries. Each course begins with foundational knowledge and builds to more complex topics. The interactive multimedia format of Amatrol’s eLearning also appeals to learners with different learning styles. Whether you’re an auditory, visual, or kinesthetic learner, Amatrol eLearning includes features that let you learn in the style that suits you best.
Screenshots
Verdict
The clearest difference is price: Amatrol eLearning at Free against Resistor Plus's $2.99. Amatrol eLearning also leads on update cadence (monthly vs every 20 months) and iOS requirement (13.0 vs 16.6). On review sentiment, 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
Amatrol eLearning 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, Amatrol eLearning monthly. The most recent releases landed on October 2, 2026 and September 22, 2026 respectively.
| Parameter | Resistor Plus | Amatrol eLearning |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | — | 2.2 (6 ratings) — better |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Every 20 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | Nitrio | Amatrol, Inc. |
Customer experience
Resistor Plus
Amatrol eLearning
In-app purchases
Resistor Plus
No in-app purchases
Amatrol eLearning
No in-app purchases
Questions
Is Resistor Plus free?
Is Amatrol eLearning free?
Do Resistor Plus or Amatrol eLearning have ads?
Which is updated more often, Resistor Plus or Amatrol eLearning?
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