# Attenuator vs SGX StarGate Authenticator

The clearest difference is in-app purchases: SGX StarGate Authenticator at none against Attenuator's 1. SGX StarGate Authenticator also leads on device support (3 vs 1) and iOS requirement (11.0 vs 17.6). Attenuator's advantage is update cadence (every 7 months vs every 52 months). On price and ads there is nothing between them.

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

Attenuator ships an update every 7 months, SGX StarGate Authenticator every 52 months. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Attenuator | SGX StarGate Authenticator |
| --- | --- | --- |
| 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 52 months |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 2 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tim E. Burrow](https://appshunter.io/developer/367216557) | [SGX](https://appshunter.io/developer/938618268) |

## 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 |


### SGX StarGate Authenticator

[App page](https://appshunter.io/ios/app/sgx-stargate-authenticator/id1331801546)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Attenuator free?

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

### Is SGX StarGate Authenticator free?

SGX StarGate Authenticator is free to download, with no in-app purchases.

### Do Attenuator or SGX StarGate Authenticator have ads?

Neither Attenuator nor SGX StarGate Authenticator shows ads.

### Which is updated more often, Attenuator or SGX StarGate Authenticator?

Attenuator ships an update every 7 months, and SGX StarGate Authenticator every 52 months. Most recently, Attenuator was updated on October 1, 2026 and SGX StarGate Authenticator on October 12, 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.*