Resistor Tools vs Resistor AI 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
Resistor AI Calculator
Point your phone's camera at a resistor to instantly identify its value. Currently supports 4-band carbon film resistors with a 5% tolerance.
- Real-time resistor detection
- Automatic resistance calculation
- Supports 4-band carbon film resistors
- 5% margin of error detection
- Uses smartphone camera
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Hold your smartphone over the resistor, and detects the object in real time and calculates the resistance value. Currently, only carbon film (brown) resistors with 4 lines and a margin of error of ± 5% (gold) are supported.
Screenshots
Verdict
The clearest difference is review sentiment: Resistor Tools at 75% against Resistor AI Calculator's 0%. Resistor Tools also leads on rating (5.0 vs 3.6) and ads (none vs shown). Resistor AI Calculator's advantage is in-app purchases (none vs 1). On price, ratings volume 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. Resistor AI Calculator asks for nothing beyond the download.
Resistor Tools holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 10 and 5 respectively. Written reviews point the same way: 75% of Resistor Tools's written reviews are positive against 0% of Resistor AI Calculator's.
Resistor Tools ships an update every 2 months, Resistor AI Calculator every 15 months. The most recent releases landed on October 21, 2026 and October 15, 2026 respectively.
| Parameter | Resistor Tools | Resistor AI Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (10 ratings) — better | 3.6 (5 ratings) |
| Positive reviews | 75.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 10 — better | 5 |
| Update frequency | Every 2 months — better | Every 15 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 4 MB | 71 MB |
| Age rating | 4+ | 4+ |
| Developer | Siu Yuen Ho | Daichi Takigawa |
Customer experience
Resistor Tools
Resistor AI Calculator
In-app purchases
Resistor Tools
- Unlock pro feature$0.99
Resistor AI Calculator
No in-app purchases
Questions
Is Resistor Tools free?
Is Resistor AI Calculator free?
Which has better reviews, Resistor Tools or Resistor AI Calculator?
Do Resistor Tools or Resistor AI Calculator have ads?
Which is updated more often, Resistor Tools or Resistor AI Calculator?
Other comparisons
