Resistor Tools Pro vs Resistor AI 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
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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)
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 price: Resistor AI Calculator at Free against Resistor Tools Pro's $0.99. Resistor AI Calculator also leads on ratings volume (5 vs 1). Resistor Tools Pro's advantage is ads (none vs shown) and update cadence (every 2 months vs every 15 months). On in-app purchases 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 AI Calculator is free to download; Resistor Tools Pro costs $0.99 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 3.6. That said, the two scores are not equally well evidenced: Resistor AI Calculator has 5 ratings behind it against 1, so its average is the more settled of the two.
Resistor Tools Pro 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 Pro | Resistor AI Calculator |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.0 (1 ratings) — better | 3.6 (5 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 2 months — better | Every 15 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | 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 Pro
Resistor AI Calculator
In-app purchases
Resistor Tools Pro
No in-app purchases
Resistor AI Calculator
No in-app purchases
Questions
Is Resistor Tools Pro free?
Is Resistor AI Calculator free?
Which has better reviews, Resistor Tools Pro or Resistor AI Calculator?
Do Resistor Tools Pro or Resistor AI Calculator have ads?
Which is updated more often, Resistor Tools Pro or Resistor AI Calculator?
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