# LED Resistor Calculator Plus vs Operational Amplifiers Pro

The clearest difference is update cadence: Operational Amplifiers Pro at every 2 months against LED Resistor Calculator Plus's every 47 months. Operational Amplifiers Pro also leads on rating (5.0 vs 4.8). LED Resistor Calculator Plus's advantage is ratings volume (8 vs 1) and price ($2.99 vs $4.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

LED Resistor Calculator Plus costs $2.99 and Operational Amplifiers Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Operational Amplifiers Pro holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: LED Resistor Calculator Plus has 8 ratings behind it against 1, so its average is the more settled of the two.

LED Resistor Calculator Plus ships an update every 47 months, Operational Amplifiers Pro every 2 months. The most recent releases landed on October 25, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | LED Resistor Calculator Plus | Operational Amplifiers Pro |
| --- | --- | --- |
| Price | **$2.99** | $4.99 |
| Rating | [4.8 (8 ratings)](https://appshunter.io/ios/app/led-resistor-calculator-plus/id1369457811/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 1 MB | 14 MB |
| Requires iOS | **13** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### LED Resistor Calculator Plus

[App page](https://appshunter.io/ios/app/led-resistor-calculator-plus/id1369457811)

Calculate the correct series resistor needed to safely power light-emitting diodes. Input supply voltage, LED voltage drop, current, and the number of LEDs to find the required resistor value and wattage.

**Highlights:** Calculate series resistor value, Determine resistor power dissipation, Recommend resistor wattage, Supports multiple LEDs in series, Input supply voltage, LED voltage, and current

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Operational Amplifiers Pro

[App page](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953)

This app provides interactive calculators and reference information for designing and analyzing op-amp circuits. It offers step-by-step explanations and technical data on popular op-amp series, aiding students and engineers in circuit development and prototyping.

**Highlights:** Interactive op-amp circuit calculators, Step-by-step explanations and formulas, Reference data on op-amps and comparators, Support for 14 languages, Light and dark mode, Advanced calculators and circuit guides (Pro), Full-text search (Pro)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is LED Resistor Calculator Plus free?

LED Resistor Calculator Plus costs $2.99, with no in-app purchases.

### Is Operational Amplifiers Pro free?

Operational Amplifiers Pro costs $4.99, with no in-app purchases.

### Which has better reviews, LED Resistor Calculator Plus or Operational Amplifiers Pro?

Operational Amplifiers Pro is rated higher. LED Resistor Calculator Plus averages 4.8 out of 5 from 8 ratings, while Operational Amplifiers Pro averages 5.0 from 1 ratings.

### Do LED Resistor Calculator Plus or Operational Amplifiers Pro have ads?

Neither LED Resistor Calculator Plus nor Operational Amplifiers Pro shows ads.

### Which is updated more often, LED Resistor Calculator Plus or Operational Amplifiers Pro?

LED Resistor Calculator Plus ships an update every 47 months, and Operational Amplifiers Pro every 2 months. Most recently, LED Resistor Calculator Plus was updated on October 25, 2026 and Operational Amplifiers Pro on October 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*