# Selcall Selective Calling Tone vs RST Scope Pro

The clearest difference is update cadence: RST Scope Pro at every 6 days against Selcall Selective Calling Tone's every 4 months. RST Scope Pro also leads on price ($1.99 vs $2.99). Selcall Selective Calling Tone's advantage is iOS requirement (12.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

Selcall Selective Calling Tone costs $2.99 and RST Scope Pro $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Selcall Selective Calling Tone ships an update every 4 months, RST Scope Pro every 6 days. The most recent releases landed on August 25, 2026 and March 12, 2026 respectively.

## The numbers

| Metric | Selcall Selective Calling Tone | RST Scope Pro |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Rating | **[3.2 (14 ratings)](https://appshunter.io/ios/app/selcall-selective-calling-tone/id547030339/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 2 MB | 1 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [koji kamogawa](https://appshunter.io/developer/1488210713) |

## What reviewers say

### Selcall Selective Calling Tone

[App page](https://appshunter.io/ios/app/selcall-selective-calling-tone/id547030339)

Generate various selective calling tones for communication. Choose from over 20 tone types, queue multiple tones for burst transmission, and customize tone durations and gaps. Store frequently used sequences for quick access.

**Highlights:** Over 20 tone types, Tone queuing and burst transmission, Customizable tone duration and gap, Memory for storing tone sequences, CTCSS continuous tone generation, CODAN mode for priority calls

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### RST Scope Pro

[App page](https://appshunter.io/ios/app/rst-scope-pro/id1550939327)

**In-app purchases:** none


## Frequently asked questions

### Is Selcall Selective Calling Tone free?

Selcall Selective Calling Tone costs $2.99, with no in-app purchases.

### Is RST Scope Pro free?

RST Scope Pro costs $1.99, with no in-app purchases.

### Do Selcall Selective Calling Tone or RST Scope Pro have ads?

Neither Selcall Selective Calling Tone nor RST Scope Pro shows ads.

### Which is updated more often, Selcall Selective Calling Tone or RST Scope Pro?

Selcall Selective Calling Tone ships an update every 4 months, and RST Scope Pro every 6 days. Most recently, Selcall Selective Calling Tone was updated on August 25, 2026 and RST Scope Pro on March 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.*