# Sonar vs RadarSmart

The clearest difference is in-app purchases: Sonar at none against RadarSmart's 2. Sonar also leads on ads (none vs shown) and iOS requirement (8.2 vs 15.0). RadarSmart's advantage is update cadence (every 6 weeks vs every 6 months). On price and device support there is nothing between them.

Both are free to download. RadarSmart sells 2 in-app purchases, starting at $4.99 per month. Sonar asks for nothing beyond the download.

Sonar ships an update every 6 months, RadarSmart every 6 weeks. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Sonar | RadarSmart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (7 ratings)](https://appshunter.io/ios/app/sonar-emergency-button-sending-your-position-in-morse-code/id975894428/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 5 MB | 53 MB |
| Requires iOS | **8.2** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Konstantinos Vogiatzakis](https://appshunter.io/developer/818619540) | [Radarme TOV](https://appshunter.io/developer/1454164722) |

## What reviewers say

### Sonar

[App page](https://appshunter.io/ios/app/sonar-emergency-button-sending-your-position-in-morse-code/id975894428)

This app sends your location via loud Morse code and ultrasonic alarms in emergencies. It can also help you find your devices by sound in everyday situations.

**Highlights:** Morse code distress signal, Ultrasonic alarm for K-9 units, Location broadcasting, Device finder by sound, Emergency alerts

**Features:** macOS Compatibility

**In-app purchases:** none


### RadarSmart

[App page](https://appshunter.io/ios/app/radarsmart/id1617774961)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Annualy | $49.99 | per year |


## Frequently asked questions

### Is Sonar free?

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

### Is RadarSmart free?

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

### Do Sonar or RadarSmart have ads?

RadarSmart shows ads; Sonar does not.

### Which is updated more often, Sonar or RadarSmart?

Sonar ships an update every 6 months, and RadarSmart every 6 weeks. Most recently, Sonar was updated on October 24, 2026 and RadarSmart on October 19, 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.*