# iAttenuation vs ISS Real

The clearest difference is rating: ISS Real at 4.8 against iAttenuation's 3.0. ISS Real also leads on update cadence (every 4 days vs every 69 months) and ratings volume (1.2K vs 2). iAttenuation's advantage is iOS requirement (15.6 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

iAttenuation costs $2.99 and ISS Real $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ISS Real holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: ISS Real has 1.2K ratings behind it against 2, so its average is the more settled of the two.

iAttenuation ships an update every 69 months, ISS Real every 4 days. The most recent releases landed on September 18, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | iAttenuation | ISS Real |
| --- | --- | --- |
| Price | $2.99 | **$0.99** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/iattenuation/id305626528/reviews) | **[4.8 (1.2K ratings)](https://appshunter.io/ios/app/iss-real-time-tracker-3d/id1079990061/reviews)** |
| Number of ratings | 2 | **1.2K** |
| Positive reviews | — | 63.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 69 months | **Every 4 days** |
| Monetization | Paid | **Free** |
| Best chart rank | — | **#51** |
| Size | 1 MB | 258 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [Michael Stebel](https://appshunter.io/developer/1027443988) |

## What reviewers say

### iAttenuation

[App page](https://appshunter.io/ios/app/iattenuation/id305626528)

This app calculates resistor values for various passive attenuator networks. It supports T, Pi, H, O, and Minimum Loss Pad configurations, allowing users to input impedance and desired attenuation. It can also adjust resistor values to standard tolerances.

**Highlights:** Calculates resistor values for passive attenuator networks, Supports Tee, Pi, H, O, and Minimum Loss Pad configurations, Input and output impedance calculation, Desired attenuation input, Adjusts resistor values to standard tolerances (1%, 5%, 10%)

**Features:** macOS Compatibility

**In-app purchases:** none


### ISS Real

[App page](https://appshunter.io/ios/app/iss-real-time-tracker-3d/id1079990061)

**Currently charting:** #51 Top Paid · Reference (US App Store)

Visualize the International Space Station, Tiangong, and Hubble in real-time 3D. Get precise flyover predictions up to 30 days in advance with a star rating system. Stream live HD video from the ISS and learn about the current crew.

**Highlights:** Real-time 3D satellite tracking, Predictive flyover alerts, Interactive Earth globe, Live HD Earth video stream, Crew information and bios, Apple Watch widgets

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is iAttenuation free?

iAttenuation costs $2.99, with no in-app purchases.

### Is ISS Real free?

ISS Real costs $0.99, with no in-app purchases.

### Which has better reviews, iAttenuation or ISS Real?

ISS Real is rated higher. iAttenuation averages 3.0 out of 5 from 2 ratings, while ISS Real averages 4.8 from 1.2K ratings.

### Do iAttenuation or ISS Real have ads?

Neither iAttenuation nor ISS Real shows ads.

### Which is updated more often, iAttenuation or ISS Real?

iAttenuation ships an update every 69 months, and ISS Real every 4 days. Most recently, iAttenuation was updated on September 18, 2026 and ISS Real on September 22, 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.*