Comparison

Photovoltaic Calculations vs Resistor

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

Head to head
About

Photovoltaic Calculations

This app helps professionals and enthusiasts design, size, and analyze solar plants. It provides precise calculations for various components, optimizing yield and efficiency. Includes theoretical resources and practical tools for immediate use.

Highlights
  • Photovoltaic panel yield calculation
  • Sun position and optimal tilt angle
  • Solar cable ampacity and cross-section
  • Protective device sizing
  • Ideal inverter selection
  • Panel decay estimation
  • Series and parallel panel connections
Features
Read full description

THE FUTURE IS SOLAR ENERGY. MAXIMIZE YOUR PLANT'S YIELD. Photovoltaic Calculations is the ultimate app for industry professionals, installers, and renewable energy enthusiasts. Design, size, and analyze every aspect of your solar plant with precision and speed. Get the most out of your solar panels by optimizing every single component simply and instantly! MAIN CALCULATIONS AND SIZING: - Photovoltaic panel yield - Air mass index and fill factor - Sun position and optimal tilt angle - Irradiance on a tilted surface - Solar cell temperature and temperature effect on the module - Integrated tools: compass, inclination, altitude - Solar cable ampacity and cross-section calculation (DC) - Protective device sizing and SPD (Surge Protection Device) requirements - String sizing and short-circuit currents - Ideal inverter selection - Photovoltaic panel decay over the years - Occupied surface area and spacing between module rows - Estimation of daylight hours during the year THEORETICAL AND PRACTICAL RESOURCES: - Series and parallel panel connections - Basic concepts: module, string, and photovoltaic array - Astronomical parameters: solar zenith, solar azimuth, solar declination Everything you need is packed into an intuitive interface, which also includes a VERY USEFUL FORMULARY always at your fingertips. Do not leave efficiency to chance, start designing your perfect solar plant today!

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.

Screenshots

Photovoltaic Calculations4 screens
Resistor4 screens

Verdict

The call

The clearest difference is rating: Photovoltaic Calculations at 5.0 against Resistor's 3.0. Photovoltaic Calculations also leads on update cadence (monthly vs every 16 months). Resistor's advantage is in-app purchases (none vs 2) and ratings volume (3 vs 1). On price, ads 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. Photovoltaic Calculations sells 2 in-app purchases, starting at $0.99 per 3 months. Resistor asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Photovoltaic Calculations holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

UpkeepUpdate frequency

Photovoltaic Calculations ships an update monthly, Resistor every 16 months. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

Scorecard6 real differences · 4 level
Photovoltaic Calculations versus Resistor: the parameters behind the verdict, then further details
ParameterPhotovoltaic CalculationsResistor
PriceFreeFree
Rating5.0 (1 ratings) — better3.0 (3 ratings)
Positive reviews—50.0% of reviews
Number of ratings13 — better
Update frequencyMonthly — betterEvery 16 months
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size31 MB22 MB
Age rating4+4+
DeveloperEgal Net di Ettore GallinaAnas Abubakar

Customer experience

Photovoltaic Calculations

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Resistor

All ratings3 ratings
Positive33.3%
Neutral33.3%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

2 purchases

Photovoltaic Calculations

Subscriptions2
  • PRO Version (3 months)$0.993 Months
  • PRO Version (1 year)7 Days trial$2.991 Year
None

Resistor

No in-app purchases

Questions

Is Photovoltaic Calculations free?
Photovoltaic Calculations is free to download, with in-app purchases available.
Is Resistor free?
Resistor is free to download, with no in-app purchases.
Which has better reviews, Photovoltaic Calculations or Resistor?
Photovoltaic Calculations is rated higher. Photovoltaic Calculations averages 5.0 out of 5 from 1 ratings, while Resistor averages 3.0 from 3 ratings.
Do Photovoltaic Calculations or Resistor have ads?
Both Photovoltaic Calculations and Resistor show ads.
Which is updated more often, Photovoltaic Calculations or Resistor?
Photovoltaic Calculations ships an update monthly, and Resistor every 16 months. Most recently, Photovoltaic Calculations was updated on November 3, 2026 and Resistor on November 6, 2026.

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