LED Calc. vs Resistor Tools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LED Calc.
This application assists in designing electronic circuits by calculating the necessary resistor values for LEDs. It simplifies the process of determining the correct components for your LED projects.
- Resistor value calculation
- LED circuit design assistance
- Component value determination
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This app calculates the value of resistor, when designing a circuit using LED.
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
Screenshots
Verdict
The clearest difference is rating: Resistor Tools at 5.0 against LED Calc.'s 1.0. Resistor Tools also leads on ads (none vs shown) and review sentiment (75% vs 50%). LED Calc.'s advantage is in-app purchases (none vs 1). On price, device support and iOS requirement 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. LED Calc. asks for nothing beyond the download.
Resistor Tools holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Resistor Tools has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of LED Calc.'s written reviews are positive against 75% of Resistor Tools's.
LED Calc. ships an update every 10 months, Resistor Tools every 2 months. The most recent releases landed on June 5, 2026 and September 24, 2026 respectively.
| Parameter | LED Calc. | Resistor Tools |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (10 ratings) — better |
| Positive reviews | 50.0% of reviews | 75.0% of reviews — better |
| Number of ratings | 1 | 10 — better |
| Update frequency | Every 10 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 17 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Jibiki Works | Siu Yuen Ho |
Customer experience
LED Calc.
Resistor Tools
In-app purchases
LED Calc.
No in-app purchases
Resistor Tools
- Unlock pro feature$0.99
Questions
Is LED Calc. free?
Is Resistor Tools free?
Which has better reviews, LED Calc. or Resistor Tools?
Do LED Calc. or Resistor Tools have ads?
Which is updated more often, LED Calc. or Resistor Tools?
Other comparisons
