Resistor Tools vs Resistor
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
Resistor
Quickly calculate resistor values from color bands or SMD codes, and vice versa. This tool is ideal for electronics enthusiasts, students, and DIYers working with 4, 5, or 6-band resistors and various SMD codes. It functions offline and requires no registration.
- Calculate resistor values from color bands
- Convert resistor values to color bands
- Supports 4, 5, and 6-band resistors
- Handles SMD codes (EIA-3, EIA-4, EIA-96)
- Works offline
- No registration required
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Resistor Converter – Fast & Easy Calculate resistor values, color bands, and SMD codes in seconds – perfect for electronics hobbyists, students, and professionals. Supports 4-, 5-, and 6-band resistors as well as SMD codes (EIA-3, EIA-4, EIA-96). - Tap color bands → read the value - Enter resistor → get matching color bands & SMD codes - Works offline, no registration required - Perfect for electronics, study & DIY projects Simple, fast, and free – the perfect companion for every electronics enthusiast!
Screenshots
Verdict
The clearest difference is in-app purchases: Resistor at none against Resistor Tools's 1. Resistor Tools's advantage is update cadence (every 2 months vs every 9 months) and iOS requirement (12.0 vs 26.0). On price, rating, ratings volume and ads 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. Resistor asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Resistor Tools against 4.9 for Resistor. Both are backed by a comparable volume of ratings — 10 and 17 respectively.
Resistor Tools ships an update every 2 months, Resistor every 9 months. The most recent releases landed on September 24, 2026 and August 27, 2026 respectively.
| Parameter | Resistor Tools | Resistor |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (10 ratings) — better | 4.9 (17 ratings) |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 10 | 17 — better |
| Update frequency | Every 2 months — better | Every 9 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 | 26.0 |
| Further details — not scored | ||
| Size | 4 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Siu Yuen Ho | Gerhard Lentschik |
Customer experience
Resistor Tools
Resistor
In-app purchases
Resistor Tools
- Unlock pro feature$0.99
Resistor
No in-app purchases
Questions
Is Resistor Tools free?
Is Resistor free?
Which has better reviews, Resistor Tools or Resistor?
Do Resistor Tools or Resistor have ads?
Which is updated more often, Resistor Tools or Resistor?
Other comparisons
