# CONTACT CIRCUIT vs RST Scope

The clearest difference is ads: CONTACT CIRCUIT at none against RST Scope's shown. CONTACT CIRCUIT also leads on monetization model (free vs ad-supported) and iOS requirement (13.0 vs 15.6). RST Scope's advantage is update cadence (every 3 days vs every 2 months). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for CONTACT CIRCUIT against 5.0 for RST Scope. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

CONTACT CIRCUIT ships an update every 2 months, RST Scope every 3 days. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | CONTACT CIRCUIT | RST Scope |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/contact-circuit/id1441647504/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/rst-scope/id1550582276/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | **Free** | Ad-supported |
| Size | 89 MB | 5 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CONTACT CIRCUIT](https://appshunter.io/developer/1441646381) | [koji kamogawa](https://appshunter.io/developer/1488210713) |

## What reviewers say

### CONTACT CIRCUIT

[App page](https://appshunter.io/ios/app/contact-circuit/id1441647504)

This app provides a comprehensive solution for managing contacts, ensuring information is up-to-date and complete. It features unique identifiers and a public directory to enhance professional and business visibility and growth.

**Highlights:** Eliminates outdated contact information, Unique Career Footprint CID#, Public Circuit Directory, Business Dashboard for administration, Increases professional visibility, Facilitates business growth

**Features:** Vision Pro support

**In-app purchases:** none


### RST Scope

[App page](https://appshunter.io/ios/app/rst-scope/id1550582276)

This utility app provides spectrum scope and waterfall displays for amateur radio operators. It enhances radios lacking these features by analyzing microphone input, allowing for clear distinction of Morse code and detailed audio frequency visualization.

**Highlights:** Spectrum scope and waterfall display, Morse code distinction via FFT, Adjustable waterfall speed, Adjustable audio input level, Switchable display band (wide/narrow), Display pause function, Recording and playback of input sound

**In-app purchases:** none


## Frequently asked questions

### Is CONTACT CIRCUIT free?

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

### Is RST Scope free?

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

### Which has better reviews, CONTACT CIRCUIT or RST Scope?

CONTACT CIRCUIT and RST Scope are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do CONTACT CIRCUIT or RST Scope have ads?

RST Scope shows ads; CONTACT CIRCUIT does not.

### Which is updated more often, CONTACT CIRCUIT or RST Scope?

CONTACT CIRCUIT ships an update every 2 months, and RST Scope every 3 days. Most recently, CONTACT CIRCUIT was updated on October 14, 2026 and RST Scope on October 13, 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.*