# Attenuator vs SatRadio

The clearest difference is in-app purchases: SatRadio at none against Attenuator's 1. SatRadio also leads on device support (3 vs 1) and iOS requirement (12.4 vs 17.6). Attenuator's advantage is ratings volume (8 vs 1). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Attenuator against 5.0 for SatRadio. 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.

Attenuator ships an update every 7 months, SatRadio every 10 months. The most recent releases landed on July 29, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | Attenuator | SatRadio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/attenuator/id367216554/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/satradio/id1497481844/reviews) |
| Number of ratings | **8** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 10 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 1 MB | 8 MB |
| Requires iOS | 17.6 | **12.4** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Tim E. Burrow](https://appshunter.io/developer/367216557) | [Dioptase](https://appshunter.io/developer/376559675) |

## 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 |


### SatRadio

[App page](https://appshunter.io/ios/app/satradio/id1497481844)

This app provides essential tools for radio and satellite communication engineers. It includes calculators and analysis features for antenna parameters, frequency calculations, link budgets, and modem performance. It also offers miscellaneous utilities for RF engineering tasks.

**Highlights:** Dish antenna analysis (axial ratio, gain, line of sight), Frequency calculations (phase noise, doppler, wavelength), Radio link analysis (coaxial losses, mismatch losses, EIRP), Modem performance metrics (C/N, C/I, PER, BER), Miscellaneous RF engineering utilities (dB calculator, converters)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Attenuator free?

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

### Is SatRadio free?

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

### Which has better reviews, Attenuator or SatRadio?

Attenuator and SatRadio are both rated 5.0 out of 5 on the App Store, from 8 and 1 ratings respectively.

### Do Attenuator or SatRadio have ads?

Neither Attenuator nor SatRadio shows ads.

### Which is updated more often, Attenuator or SatRadio?

Attenuator ships an update every 7 months, and SatRadio every 10 months. Most recently, Attenuator was updated on July 29, 2026 and SatRadio on June 3, 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.*