Comparison

Resistor vs Hallofan

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

Head to head
About

Resistor

This application simplifies electronic circuit calculations with tools for series/parallel resistance, LED current limiting, and three-phase circuit conversions. It also features a resistor color code decoder for quick component identification.

Highlights
  • Series/parallel resistor calculator
  • LED series resistor calculator
  • Star-delta and delta-star converters
  • Resistor color code decoder
  • Intuitive interface
Features
Read full description

Resistor Calc is an essential tool for anyone working with electronic circuits and resistors. Designed to streamline complex calculations and provide invaluable insights, this powerful app for iOS devices is a must-have in your toolkit. At the heart of Resistor Calc lies a comprehensive suite of calculators tailored to the needs of electrical engineers, students, hobbyists, and professionals. The series/parallel calculator makes it a breeze to determine the equivalent resistance for even the most intricate circuit configurations, eliminating the need for tedious manual calculations prone to errors. The LED series resistor calculator is a game-changer for those working with LED lighting systems. Simply input the required parameters, and Resistor Calc will recommend the ideal resistor value to ensure proper current limiting and protect your LEDs from potential damage, ensuring optimal performance and longevity. For three-phase circuits, the app's star-delta and delta-star converters streamline the process of switching between different wiring configurations. Whether you need to convert from star to delta or vice versa, Resistor Calc has you covered, saving you valuable time and effort. But the true standout feature of Resistor Calc is its powerful resistor color code decoder. Never again will you need to decipher those tiny colored bands manually. Simply input the color codes, and the app will instantly reveal the resistor's value, tolerance, and other essential information, making component identification a breeze and saving you countless hours of frustration. With its sleek and intuitive interface, Resistor Calc is designed for seamless navigation and ease of use. Whether you're a student grappling with complex circuit problems or a seasoned professional tackling intricate projects, this app empowers you with accurate and reliable calculations at your fingertips. Download Resistor Calc today and experience the power of efficient circuit analysis and resistor management on your iOS device. Streamline your workflow, minimize errors, and unlock new levels of productivity in your electrical engineering endeavours.

About

Hallofan

Features
Read full description

针对HD系列全息屏控制端,可以实现对HD系列的全息屏上传图片和视频,控制亮度、角度、音量等控制

Screenshots

Resistor4 screens
Hallofan4 screens

Verdict

The call

The clearest difference is ads: Hallofan at none against Resistor's shown. Hallofan also leads on update cadence (every 3 months vs every 16 months). 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Resistor ships an update every 16 months, Hallofan every 3 months. The most recent releases landed on September 27, 2026 and September 29, 2026 respectively.

Scorecard2 real differences · 8 level
Resistor versus Hallofan: the parameters behind the verdict, then further details
ParameterResistorHallofan
PriceFreeFree
Rating3.0 (3 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 16 monthsEvery 3 months — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.013.0
Further details — not scored
Size22 MB84 MB
Age rating4+4+
DeveloperAnas Abubakar家志 高

In-app purchases

None

Resistor

No in-app purchases

None

Hallofan

No in-app purchases

Questions

Is Resistor free?
Resistor is free to download, with no in-app purchases.
Is Hallofan free?
Hallofan is free to download, with no in-app purchases.
Do Resistor or Hallofan have ads?
Resistor shows ads; Hallofan does not.
Which is updated more often, Resistor or Hallofan?
Resistor ships an update every 16 months, and Hallofan every 3 months. Most recently, Resistor was updated on September 27, 2026 and Hallofan on September 29, 2026.

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