Comparison

Led Car vs SJ Resistor Calculator

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

Head to head
About

Led Car

Features
Read full description

Led Car computes the series resistor you need when replacing a car LED with one of a different wattage, based on your supply voltage. Just enter your voltage, the original LED power and the new LED power: Led Car gives you the resistor value (Ohm) and the recommended wattage. If no resistor is needed, it tells you so. - Fast, offline, no account required - Clean native SwiftUI interface - Full VoiceOver and Dynamic Type support - Light and dark mode - Optional tip jar to support development (unlocks nothing)

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!

Screenshots

Led Car4 screens
SJ Resistor Calculator4 screens

Verdict

The call

The clearest difference is ads: Led Car at none against SJ Resistor Calculator's shown. SJ Resistor Calculator's advantage is update cadence (every 2 weeks vs every 54 months) and iOS requirement (16.0 vs 18.0). On price, 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

Both are free to download. Led Car sells 4 one-off in-app purchases and SJ Resistor Calculator sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Led Car ships an update every 54 months, SJ Resistor Calculator every 2 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 6 level
Led Car versus SJ Resistor Calculator: the parameters behind the verdict, then further details
ParameterLed CarSJ Resistor Calculator
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 54 monthsEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.016.0 — better
Further details — not scored
Size3 MB4 MB
Age rating4+4+
DeveloperSalvatore BoemiaStephane JAILLIARD

In-app purchases

4 purchases

Led Car

One-time4
  • Espresso$0.99
  • Cappuccino$2.99
  • Breakfast$3.99
Show 1 more
  • Lunch$8.99
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

Questions

Is Led Car free?
Led Car is free to download, with in-app purchases available.
Is SJ Resistor Calculator free?
SJ Resistor Calculator is free to download, with in-app purchases available.
Do Led Car or SJ Resistor Calculator have ads?
SJ Resistor Calculator shows ads; Led Car does not.
Which is updated more often, Led Car or SJ Resistor Calculator?
Led Car ships an update every 54 months, and SJ Resistor Calculator every 2 weeks. Most recently, Led Car was updated on November 3, 2026 and SJ Resistor Calculator on November 4, 2026.

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