# Attenuator vs LED Calc.

The clearest difference is review sentiment: Attenuator at 100% against LED Calc.'s 50%. Attenuator also leads on rating (5.0 vs 1.0) and ads (none vs shown). LED Calc.'s advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 17.6). On price, update cadence and device support there is nothing between them.

Both are free to download. Attenuator sells 1 one-off in-app purchase. LED Calc. asks for nothing beyond the download.

Attenuator holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Attenuator has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Attenuator's written reviews are positive against 50% of LED Calc.'s.

Attenuator ships an update every 7 months, LED Calc. every 10 months. The most recent releases landed on July 29, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | Attenuator | LED Calc. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/attenuator/id367216554/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/led-calc/id556845805/reviews) |
| Number of ratings | **8** | 1 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 7 months** | Every 10 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 1 MB | 17 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tim E. Burrow](https://appshunter.io/developer/367216557) | [Jibiki Works](https://appshunter.io/developer/556845808) |

## What reviewers say

### Attenuator

[App page](https://appshunter.io/ios/app/attenuator/id367216554)

Calculate output voltage, power, and attenuation based on input values and dB of attenuation. Features NMR-specific calculations for pulses and measures local magnetic fields and barometric pressure.

**Highlights:** Calculate output voltage and power, Specify input voltage (Vpp or Vrms), Calculate attenuation in dB, NMR pulse calculations, Measure local magnetic field, Display barometric pressure

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove all ads | $1.99 | one-time |


### LED Calc.

[App page](https://appshunter.io/ios/app/led-calc/id556845805)

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.

**Highlights:** Resistor value calculation, LED circuit design assistance, Component value determination

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Attenuator free?

Attenuator is free to download, with in-app purchases available.

### Is LED Calc. free?

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

### Which has better reviews, Attenuator or LED Calc.?

Attenuator is rated higher. Attenuator averages 5.0 out of 5 from 8 ratings, while LED Calc. averages 1.0 from 1 ratings.

### Do Attenuator or LED Calc. have ads?

LED Calc. shows ads; Attenuator does not.

### Which is updated more often, Attenuator or LED Calc.?

Attenuator ships an update every 7 months, and LED Calc. every 10 months. Most recently, Attenuator was updated on July 29, 2026 and LED Calc. on June 5, 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.*