Resistor Tools vs Voltage Divider Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Resistor Tools
This utility app provides a suite of tools for calculating and determining resistor values. It assists hobbyists and engineers with series, parallel, and voltage divider calculations, as well as inverting amplifier gain.
- Series and parallel resistor calculation
- Resistor combination finder
- Voltage divider ratio and value calculation
- Inverting amplifier gain calculation
- Save combinations to CSV
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This app is a collection of resistor calculators. It is suitable for hobbyist or electronic engineer. * Calculate resistance of two resistors in series or parallel * Find out combinations of two 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
Voltage Divider Calculator
Calculate unknown values in voltage divider circuits with ease. Supports loaded dividers, power dissipation calculations, and finding standard resistor values. Ideal for students, hobbyists, and engineers.
- Calculate Vin, Vout, R1, R2
- Support for loaded dividers (RL)
- Power dissipation calculation (P(R1), P(R2))
- Find nearest standard E24 resistor values
- Supports Ohms and Kilo-Ohms
- Instant results as you type
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Voltage Divider Calculator Easily solve voltage divider circuits Enter any 3 known values — • Input Voltage (Vin) • Output Voltage (Vout) • Resistor 1 (R1) • Resistor 2 (R2) and the app instantly calculates the fourth. NEW in this version: • Loaded divider support — add an optional Load Resistance (RL) to see the real output voltage under load • Power dissipation — see P(R1) and P(R2) instantly, so you can pick the right resistor wattage • Standard values — get the nearest E24 resistor value for your calculated resistance • Completely ad-free — no banners, no pop-ups, no tracking Supports Ohms and Kilo-Ohms, with instant results as you type. Perfect for students, hobbyists, and engineers doing quick, accurate circuit analysis and design. Compatible with both iPhone and iPad.
Screenshots
Verdict
The clearest difference is rating: Resistor Tools at 5.0 against Voltage Divider Calculator's 3.3. Resistor Tools also leads on update cadence (every 2 months vs every 11 months) and ratings volume (10 vs 3). Voltage Divider Calculator's advantage is in-app purchases (none 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
Both are free to download. Resistor Tools sells 1 one-off in-app purchase. Voltage Divider Calculator asks for nothing beyond the download.
Resistor Tools holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 10 and 3 respectively.
Resistor Tools ships an update every 2 months, Voltage Divider Calculator every 11 months. The most recent releases landed on September 24, 2026 and August 25, 2026 respectively.
| Parameter | Resistor Tools | Voltage Divider Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (10 ratings) — better | 3.3 (3 ratings) |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 10 — better | 3 |
| Update frequency | Every 2 months — better | Every 11 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 4 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Siu Yuen Ho | V PUGAZHENTHI |
Customer experience
Resistor Tools
Voltage Divider Calculator
In-app purchases
Resistor Tools
- Unlock pro feature$0.99
Voltage Divider Calculator
No in-app purchases
Questions
Is Resistor Tools free?
Is Voltage Divider Calculator free?
Which has better reviews, Resistor Tools or Voltage Divider Calculator?
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Which is updated more often, Resistor Tools or Voltage Divider Calculator?
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