# Attenuator vs Unit Converter

The clearest difference is update cadence: Unit Converter at every 9 days against Attenuator's every 7 months. Unit Converter also leads on device support (5 vs 1) and iOS requirement (15.0 vs 17.6). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Attenuator sells 1 one-off in-app purchase and Unit Converter sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Attenuator against 4.9 for Unit Converter. Both are backed by a comparable volume of ratings — 8 and 17 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Attenuator ships an update every 7 months, Unit Converter every 9 days. The most recent releases landed on July 29, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Attenuator | Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/attenuator/id367216554/reviews)** | [4.9 (17 ratings)](https://appshunter.io/ios/app/unit-converter-uneat/id1668309493/reviews) |
| Number of ratings | 8 | **17** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 9 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 1 MB | 15 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Tim E. Burrow](https://appshunter.io/developer/367216557) | [ZIJIAN CHEN](https://appshunter.io/developer/1668309495) |

## 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 |


### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-uneat/id1668309493)

This utility app offers conversion for over 100 units across 18 categories, including length, mass, temperature, and digital storage. It supports a wide range of specific units within each category and provides a clean, ad-free interface for quick conversions.

**Highlights:** 18 unit categories, Over 100 units supported, Ad-free experience, Supports multiple devices, Pro version with free trial

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version (1 Month) | $0.99 | per month |
| 1 cup of orange juice. | $0.99 | one-time |
| 1 litre of orange juice. | $2.99 | one-time |
| Pro Version (Lifetime) | $3.99 | one-time |


## Frequently asked questions

### Is Attenuator free?

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

### Is Unit Converter free?

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

### Which has better reviews, Attenuator or Unit Converter?

Attenuator is rated higher. Attenuator averages 5.0 out of 5 from 8 ratings, while Unit Converter averages 4.9 from 17 ratings.

### Do Attenuator or Unit Converter have ads?

Neither Attenuator nor Unit Converter shows ads.

### Which is updated more often, Attenuator or Unit Converter?

Attenuator ships an update every 7 months, and Unit Converter every 9 days. Most recently, Attenuator was updated on July 29, 2026 and Unit Converter on June 10, 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.*