Comparison

Resistor Tools Pro vs Capacitor Calculator

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

Head to head
About

Resistor Tools Pro

This utility app offers a suite of tools for calculating and finding resistor combinations. It's designed for electronics enthusiasts and professionals needing to determine series, parallel, and voltage divider configurations. Save and share your calculations easily.

Highlights
  • Calculate series/parallel resistance
  • Find resistor combinations for desired resistance
  • Voltage divider ratio and value calculation
  • Inverting amplifier gain calculation
  • Save combinations to CSV
  • Share via AirDrop
  • Upload CSV to iCloud Drive
Read full description

This app is a collection of resistor calculators. It is suitable for hobbyist or electronic engineer. * Calculate resistance of 2 resistors in series or parallel * Find out combinations of 2 resistors in series/parallel making a desired resistance * Calculate ratio of R1/R2 and voltage divider * Find out resistor values of making voltage divider ratio * Find out resistor values of making inverting amplifier gain * Save combination values in CSV file * Share document via AirDrop * Upload CSV file to iCloud Drive (For iOS8 or later)

About

Capacitor Calculator

This utility app calculates the time constant and energy stored in a capacitor. It helps understand the time-delay characteristics of electrical circuits when a voltage is applied.

Highlights
  • Calculate time constant (RC)
  • Calculate energy stored (E)
  • Input voltage, capacitance, and resistance
  • Understand capacitor charging/discharging
  • Analyze circuit time-delay
Features
Read full description

Capacitor Calculator is an all-in-one toolkit for students, hobbyists, technicians, and electrical engineers who work with capacitors every day. Whether you are designing an RC circuit, sizing a power supply, building a flash circuit, or studying electromagnetism for an exam, this app gives you fast and accurate answers together with the formulas and calculation steps behind every result. THREE CALCULATORS IN ONE APP 1. Capacitor Charge and Time Constant Enter supply voltage (V), capacitance (C), and series resistance (R) to instantly calculate: • Stored energy: E = 0.5 * C * V^2 • RC time constant: T = R * C • Charge stored: Q = C * V 2. Parallel Plate Capacitance Compute capacitance using plate area, separation distance, and relative permittivity with: C = e0 * er * A / d Perfect for understanding how geometry and dielectric materials affect capacitance. 3. Spherical Capacitor Calculate capacitance between two concentric conducting spheres using: C = 4 * pi * e0 * er * R1 * R2 / (R2 - R1) Choose from built-in dielectric materials including vacuum, air, paper, glass, mica, ceramic, polyethylene, polystyrene, Teflon, silicon, and water. BUILT FOR REAL WORK • Unit-aware inputs for voltage, capacitance, resistance, length, and area • Scientific notation for very small or very large values • Full calculation steps with formulas and substituted values • Copy results with one tap • Save and review calculation history • Everything runs on-device with no tracking, no account, and no internet required A POLISHED NATIVE IOS EXPERIENCE • Full Light Mode and Dark Mode support • Reference tab with physical constants, formulas, and dielectric materials table Capacitor Calculator is a focused tool for electrical engineering, electronics design, physics homework, and EE coursework. Download it once and keep professional-grade capacitor calculations in your pocket. Thanks for your support, and visit nitrio.com for more apps for your iPhone and iPad.

Screenshots

Resistor Tools Pro4 screens
Capacitor Calculator4 screens

Verdict

The call

The clearest difference is update cadence: Resistor Tools Pro at every 2 months against Capacitor Calculator's every 29 months. Resistor Tools Pro also leads on rating (4.0 vs 3.8) and price ($0.99 vs $2.99). Capacitor Calculator's advantage is ratings volume (4 vs 1). On ads, in-app purchases, monetization model 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

Resistor Tools Pro costs $0.99 and Capacitor Calculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Resistor Tools Pro holds the better App Store score, 4.0 against 3.8. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

UpkeepUpdate frequency

Resistor Tools Pro ships an update every 2 months, Capacitor Calculator every 29 months. The most recent releases landed on June 25, 2026 and September 14, 2026 respectively.

Scorecard5 real differences · 4 level
Resistor Tools Pro versus Capacitor Calculator: the parameters behind the verdict, then further details
ParameterResistor Tools ProCapacitor Calculator
Price$0.99 — better$2.99
Rating4.0 (1 ratings) — better3.8 (4 ratings)
Number of ratings14 — better
Update frequencyEvery 2 months — betterEvery 29 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better17.6
Further details — not scored
Size4 MB1 MB
Age rating4+4+
DeveloperSiu Yuen HoNitrio

Customer experience

Resistor Tools Pro

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

Capacitor Calculator

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Resistor Tools Pro

No in-app purchases

None

Capacitor Calculator

No in-app purchases

Questions

Is Resistor Tools Pro free?
Resistor Tools Pro costs $0.99, with no in-app purchases.
Is Capacitor Calculator free?
Capacitor Calculator costs $2.99, with no in-app purchases.
Which has better reviews, Resistor Tools Pro or Capacitor Calculator?
Resistor Tools Pro is rated higher. Resistor Tools Pro averages 4.0 out of 5 from 1 ratings, while Capacitor Calculator averages 3.8 from 4 ratings.
Do Resistor Tools Pro or Capacitor Calculator have ads?
Neither Resistor Tools Pro nor Capacitor Calculator shows ads.
Which is updated more often, Resistor Tools Pro or Capacitor Calculator?
Resistor Tools Pro ships an update every 2 months, and Capacitor Calculator every 29 months. Most recently, Resistor Tools Pro was updated on June 25, 2026 and Capacitor Calculator on September 14, 2026.

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