Resistor Tools Pro vs Capacitor Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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 descriptionHide 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)
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.
- Calculate time constant (RC)
- Calculate energy stored (E)
- Input voltage, capacitance, and resistance
- Understand capacitor charging/discharging
- Analyze circuit time-delay
Read full descriptionHide 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
Verdict
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
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.
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.
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.
| Parameter | Resistor Tools Pro | Capacitor Calculator |
|---|---|---|
| Price | $0.99 — better | $2.99 |
| Rating | 4.0 (1 ratings) — better | 3.8 (4 ratings) |
| Number of ratings | 1 | 4 — better |
| Update frequency | Every 2 months — better | Every 29 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 4 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Siu Yuen Ho | Nitrio |
Customer experience
Resistor Tools Pro
Capacitor Calculator
In-app purchases
Resistor Tools Pro
No in-app purchases
Capacitor Calculator
No in-app purchases
Questions
Is Resistor Tools Pro free?
Is Capacitor Calculator free?
Which has better reviews, Resistor Tools Pro or Capacitor Calculator?
Do Resistor Tools Pro or Capacitor Calculator have ads?
Which is updated more often, Resistor Tools Pro or Capacitor Calculator?
Other comparisons















