Sonar vs RadarSmart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sonar
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.
- Morse code distress signal
- Ultrasonic alarm for K-9 units
- Location broadcasting
- Device finder by sound
- Emergency alerts
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Imagine yourself in the unfortunate situation where you are trapped under debris after an earthquake or a typhoon disaster or buried under meters of snow as a result of an avalanche. Your watch will most possibly be the only, within reach of access to press a button. Press it and your phone will be transmitting a loud Morse code, as an alarm, indicating your altitude or depth in case rescue is close looking out for you. Simultaneously, an ultrasonic alarm is activated so a K-9 rescue team can listen from bigger distance. As part of your everyday life, you can just use it to locate by sound your favorite device in home, office and outdoors!
RadarSmart
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RadarSmart is a mobile app to protect your smartphone and keep your loved ones safe. It combines a GPS tracker, SOS button, anti-theft tools, and an air quality map to keep you connected with your family and ensure their well-being no matter where they are. Why should you install RadarSmart? When your relatives are on the road, in another city or country, it's important to be able to quickly find out where they are and if they're okay. RadarSmart will also help you come to the rescue in case of danger thanks to the SOS Button. The app also allows you to see when your child has gone to school or is already at home, when your parents have arrived at the cottage, and when someone in the family has returned from work. Lost your iphone? RadarSmart will help you find, block, or wipe data from your device remotely. No one will use your smartphone without your permission! Important features of RadarSmart: — Real-time GPS tracking: see the location of children, parents, or friends on the map; — SOS Button to get help in time! — Smartphone protection in case of loss or theft: remotely lock, clear data and search for your smartphone; — Sound signal: sends a signal even when the sound is off — handy if the phone is lost at home; — Background location detection: the app works constantly, without the need to manually launch it; — Personal data protection: to check your email for hacks and data leaks; — Internet safety: to use the Internet without the threat of encountering fraudsters online; — Round-the-clock support: contact us at any time or manage your device online through your Personal account. Family features: ~ Creating circles "Family", "Children", "Parents", "Work" for joint control; ~ Push notifications about arrival and leaving from certain places: school, home, gym; ~ Marking of dangerous zones (landfills, train stations, water bodies, etc.) and safe zones (home, school); ~ Easy addition of new members to the circle via messengers or SMS; ~ Checking email addresses for leaks and hacks in the darknet. RadarSmart guarantees and benefits: — All the conveniences in one app; — Works on IOS 15 and later; — Available to all users in the world; — Support is available 24/7. RadarSmart is a peace of mind for your loved ones and smartphone protection with just one app. Install it now! Details: www.radarsmart.app
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Sonar | RadarSmart |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (7 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 6 months | Every 6 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 8.2 — better | 15.0 |
| Further details — not scored | ||
| Size | 5 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | Konstantinos Vogiatzakis | Radarme TOV |
In-app purchases
Sonar
No in-app purchases
RadarSmart
- Monthly7 Days trial$4.991 Month
- Annualy7 Days trial$49.991 Year









