# iAttenuation vs DX Spots

The clearest difference is price: DX Spots at Free against iAttenuation's $2.99. DX Spots also leads on rating (3.5 vs 3.0) and update cadence (every 10 days vs every 69 months). iAttenuation's advantage is in-app purchases (none vs 5) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

DX Spots is free to download; iAttenuation costs $2.99 up front. DX Spots sells 5 in-app purchases, starting at $0.99 per month. iAttenuation asks for nothing beyond the download.

DX Spots holds the better App Store score, 3.5 against 3.0. That said, the two scores are not equally well evidenced: DX Spots has 11 ratings behind it against 2, so its average is the more settled of the two.

iAttenuation ships an update every 69 months, DX Spots every 10 days. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | iAttenuation | DX Spots |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/iattenuation/id305626528/reviews) | **[3.5 (11 ratings)](https://appshunter.io/ios/app/dx-spots/id1127933539/reviews)** |
| Number of ratings | 2 | **11** |
| Positive reviews | — | 28.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 69 months | **Every 10 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 10 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [Jonathan Gibbs](https://appshunter.io/developer/1111944472) |

## 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


### DX Spots

[App page](https://appshunter.io/ios/app/dx-spots/id1127933539)

This app provides a live feed of amateur radio spots from the DX Cluster network. It allows users to view current spots across all bands and modes, perform QRZ lookups, and submit their own spots to the network.

**Highlights:** Live DX Cluster feed, Amateur radio spots, All bands and modes, QRZ lookup, Submit spots

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DXSpots Monthly Subscription | $0.99 | per month |
| DXSpots 3 Month Subscription | $1.99 | per 3 months |
| DXSpots 6 Month Subscription | $2.99 | per 6 months |
| DXSpots Yearly Subscription | $7.99 | per year |
| DX Spots - Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is iAttenuation free?

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

### Is DX Spots free?

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

### Which has better reviews, iAttenuation or DX Spots?

DX Spots is rated higher. iAttenuation averages 3.0 out of 5 from 2 ratings, while DX Spots averages 3.5 from 11 ratings.

### Do iAttenuation or DX Spots have ads?

DX Spots shows ads; iAttenuation does not.

### Which is updated more often, iAttenuation or DX Spots?

iAttenuation ships an update every 69 months, and DX Spots every 10 days. Most recently, iAttenuation was updated on October 5, 2026 and DX Spots 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.*