Comparison

SJ Resistor Calculator vs Resistor Color Code Reader

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

Head to head
About

SJ Resistor Calculator

This tool simplifies resistor calculations for electronics enthusiasts, students, and professionals. It accurately decodes resistor color codes and performs series/parallel calculations for complex circuit analysis. Avoid manual errors and streamline your electronics projects.

Highlights
  • Resistor color code decoding (4, 5, 6 band)
  • Series resistor calculations
  • Parallel resistor calculations
  • Accurate resistance and tolerance values
  • User-friendly interface
Features
Read full description

############################# # SJ RESISTOR CALCULATOR # ############################# Never misread your electronic components again! SJ Resistor Calculator is the essential tool for professionals, students, and electronics enthusiasts. No more color code errors or tedious calculations for your circuits! +----------------------------------------+ | WHY CHOOSE THIS APP | +----------------------------------------+ [ INTUITIVE DECODING ] - Instantly read 4, 5, or 6-band resistors. - Get the exact value and tolerance effortlessly. [ SERIES CALCULATIONS ] - Calculate the equivalent resistance of your series circuits. - Add as many components as you need. [ PARALLEL CALCULATIONS ] - Easily analyze the behavior of your parallel circuits. - Absolute precision for your electrical designs. [ PROFESSIONAL RELIABILITY ] - A clean, ergonomic, and straightforward interface. - Designed for maintenance, studies, and troubleshooting. Free and available in your language, download it today!

About

Resistor Color Code Reader

Features
Read full description

Read any resistor in seconds. Tap the bands as you see them on the component and the value appears instantly, with its tolerance and the range the part is actually guaranteed to fall in. Type a value instead and the app shows you which bands print it. FOUR, FIVE AND SIX BANDS A 4-band resistor carries two significant digits and a 5-band carries three, so the same colours mean different things on different parts. Most apps quietly assume one format. This one asks, and switching between them keeps the value you already have. GOLD AND SILVER ARE MULTIPLIERS TOO Not just tolerances. Without them every sub-ohm resistor is unreadable, and a surprising number of calculators cannot read one. THE BENCH TOOLS Unlock surface-mount decoding for 3-digit, 4-digit, R-notation and EIA-96 markings — including the one genuinely ambiguous case, where the app names both readings instead of guessing. Snap any value to the nearest E6, E12, E24, E48 or E96 preferred value and see how far off it is. Add up a handful of resistors in series and in parallel. WRITTEN THE WAY YOU WRITE IT Type 4k7, 4.7k, 4700, 470R or R47 — all of them parse, along with a comma decimal mark and Arabic and Persian numerals. NO ACCOUNT. NO INTERNET NEEDED. NO TRACKING. Everything is calculated on your phone. Nothing is uploaded anywhere, and the app makes no network requests at all.

Screenshots

SJ Resistor Calculator4 screens
Resistor Color Code Reader2 screens

Verdict

The call

The clearest difference is ads: Resistor Color Code Reader at none against SJ Resistor Calculator's shown. SJ Resistor Calculator's advantage is update cadence (every 2 weeks vs every 4 weeks). On price, in-app purchases, device support and iOS requirement 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

Both are free to download. SJ Resistor Calculator sells 5 one-off in-app purchases and Resistor Color Code Reader sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SJ Resistor Calculator ships an update every 2 weeks, Resistor Color Code Reader every 4 weeks. The most recent releases landed on July 18, 2026 and October 1, 2026 respectively.

Scorecard2 real differences · 7 level
SJ Resistor Calculator versus Resistor Color Code Reader: the parameters behind the verdict, then further details
ParameterSJ Resistor CalculatorResistor Color Code Reader
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 weeks — betterEvery 4 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better16.4
Further details — not scored
Size4 MB58 MB
Age rating4+4+
DeveloperStephane JAILLIARDRavinderjeet Dhillon

In-app purchases

5 purchases

SJ Resistor Calculator

One-time5
  • A coffee$0.99
  • A cookie$2.99
  • No ads$4.99
Show 2 more
  • A lemon tart$4.99
  • A pizza$9.99
1 purchases

Resistor Color Code Reader

One-time1
  • Workbench Tools$3.99

Questions

Is SJ Resistor Calculator free?
SJ Resistor Calculator is free to download, with in-app purchases available.
Is Resistor Color Code Reader free?
Resistor Color Code Reader is free to download, with in-app purchases available.
Do SJ Resistor Calculator or Resistor Color Code Reader have ads?
SJ Resistor Calculator shows ads; Resistor Color Code Reader does not.
Which is updated more often, SJ Resistor Calculator or Resistor Color Code Reader?
SJ Resistor Calculator ships an update every 2 weeks, and Resistor Color Code Reader every 4 weeks. Most recently, SJ Resistor Calculator was updated on July 18, 2026 and Resistor Color Code Reader on October 1, 2026.

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