Comparison

Resistor Plus vs MyChaffey

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

MyChaffey

This app provides students with a centralized hub for campus life. Access class schedules, assignments, student services, and campus events. Receive important announcements and connect with the college community.

Highlights
  • Class and assignment access
  • Student service information
  • Campus event listings
  • Push notifications for updates
  • Campus maps
  • Staff and department directory
Features
Read full description

MyChaffey is the new mobile app that connects you to your Chaffey College campus and community. Get convenient access to your classes, assignments, student services, campus events, important announcements and more. Use MyChaffey to: - Connect to your Academic and Career Community - Receive push notifications on upcoming deadlines, events and important campus updates - Find staff, professors, departments, services, organizations and peers - Conveniently access campus maps - Stay focused on your most important to-dos If you have questions about the MyChaffey App, please contact the IT Help Desk by emailing isrepairs@chaffey.edu.

Screenshots

Resistor Plus4 screens
MyChaffey4 screens

Verdict

The call

The clearest difference is price: MyChaffey at Free against Resistor Plus's $2.99. MyChaffey also leads on update cadence (every 5 months vs every 20 months) and iOS requirement (14.2 vs 16.6). 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

MyChaffey 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, MyChaffey every 5 months. The most recent releases landed on October 2, 2026 and September 28, 2026 respectively.

Scorecard4 real differences · 6 level
Resistor Plus versus MyChaffey: the parameters behind the verdict, then further details
ParameterResistor PlusMyChaffey
Price$2.99Free — better
Rating—3.0 (6 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings—6 — better
Update frequencyEvery 20 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.614.2 — better
Further details — not scored
Size1 MB8 MB
Age rating4+17+
DeveloperNitrioUCROO

Customer experience

Resistor Plus

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

MyChaffey

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%

In-app purchases

None

Resistor Plus

No in-app purchases

None

MyChaffey

No in-app purchases

Questions

Is Resistor Plus free?
Resistor Plus costs $2.99, with no in-app purchases.
Is MyChaffey free?
MyChaffey is free to download, with no in-app purchases.
Do Resistor Plus or MyChaffey have ads?
Neither Resistor Plus nor MyChaffey shows ads.
Which is updated more often, Resistor Plus or MyChaffey?
Resistor Plus ships an update every 20 months, and MyChaffey every 5 months. Most recently, Resistor Plus was updated on October 2, 2026 and MyChaffey on September 28, 2026.

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