# LED Resistor Calculator Plus vs FLY

The clearest difference is price: FLY at Free against LED Resistor Calculator Plus's $2.99. FLY also leads on update cadence (every 3 weeks vs every 47 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

FLY is free to download; LED Resistor Calculator Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

LED Resistor Calculator Plus ships an update every 47 months, FLY every 3 weeks. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | LED Resistor Calculator Plus | FLY |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.8 (8 ratings)](https://appshunter.io/ios/app/led-resistor-calculator-plus/id1369457811/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 1 MB | 137 MB |
| Requires iOS | 13 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Shenzhen Eastgallop Technology Co., LTD](https://appshunter.io/developer/1478354346) |

## 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


### FLY

[App page](https://appshunter.io/ios/app/fly-uav/id6744342708)

**Features:** macOS Compatibility

**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 FLY free?

FLY is free to download, with no in-app purchases.

### Do LED Resistor Calculator Plus or FLY have ads?

Neither LED Resistor Calculator Plus nor FLY shows ads.

### Which is updated more often, LED Resistor Calculator Plus or FLY?

LED Resistor Calculator Plus ships an update every 47 months, and FLY every 3 weeks. Most recently, LED Resistor Calculator Plus was updated on November 2, 2026 and FLY on October 30, 2026.

---

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