# Attenuator vs R&S PQA

The clearest difference is in-app purchases: R&S PQA at none against Attenuator's 1. R&S PQA also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.6). On price, update cadence and ads there is nothing between them.

Both are free to download. Attenuator sells 1 one-off in-app purchase. R&S PQA asks for nothing beyond the download.

Attenuator ships an update every 7 months, R&S PQA every 4 months. The most recent releases landed on October 18, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Attenuator | R&S PQA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/attenuator/id367216554/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 13 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tim E. Burrow](https://appshunter.io/developer/367216557) | [Rohde & Schwarz GmbH & Co. KG](https://appshunter.io/developer/364229795) |

## 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 |


### R&S PQA

[App page](https://appshunter.io/ios/app/r-and-s-pqa/id1109979691)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Attenuator free?

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

### Is R&S PQA free?

R&S PQA is free to download, with no in-app purchases.

### Do Attenuator or R&S PQA have ads?

Neither Attenuator nor R&S PQA shows ads.

### Which is updated more often, Attenuator or R&S PQA?

Attenuator ships an update every 7 months, and R&S PQA every 4 months. Most recently, Attenuator was updated on October 18, 2026 and R&S PQA on October 26, 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.*