Comparison

Send.Morse vs Sonar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Send.Morse

Translate text into Morse code and decode incoming light signals back into text in real-time. This app helps you communicate using the classic dot-and-dash system, even if you've forgotten the basics.

Highlights
  • Transmit messages as Morse code
  • Decode light signals into text
  • Real-time translation
  • Adjustable Morse pad calibration
  • Morse code sign table reference
  • Supports English, German, Spanish, Croatian
Features
Read full description

Send.Morse is an easy to use application to transmit messages as morse code and decode received light signals in real time back into text. Imagine sitting somewhere in the wilderness. Suddenly you see some mysterious light signals. Is there someone communicating with you? You remember a thing called morse code from your days with the boy scouts but age has faded away some essential basics of this art of communication. No problem anymore – with Send.Morse you have the answer in your hands. To decode some signals you receive from the end of the world simply switch into reveive mode and tap on your iPhone's screen. Your iPhone shows you the received message in no time. It's that easy. Sending a message is as simple as receiving one. Just switch to input mode, type your text with iPhone's keyboard, and press the transmit button. If the secret of dots and slashes – or dits and dahs as we call them – returns to your memory, it's also possible to tap on your iPhone's screen to translate your message into flashing light signals without using the keyboard. You can calibrate your morse pad, so it fits your personal taping speed. Of course we provide a table with all supported signs to you, so you can check if our app is working correctly. This is only for doubters who are still a little bit sceptically about communicating with short and long light signals. ;o) We believe that communication with this old school messenger is lots of fun. So try it out – the proof is in the pudding. Have a look at our video on youtube: http://www.youtube.com/watch?v=gkisrlMDhrM Available in the following languages: English German Spanish Croatian

About

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.

Highlights
  • Morse code distress signal
  • Ultrasonic alarm for K-9 units
  • Location broadcasting
  • Device finder by sound
  • Emergency alerts
Features
Read full description

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!

Screenshots

Send.Morse4 screens
Sonar1 screens

Verdict

The call

The clearest difference is price: Sonar at Free against Send.Morse's $0.99. Sonar also leads on update cadence (every 6 months vs every 15 months) and review sentiment (33% vs 25%). On ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Sonar is free to download; Send.Morse costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Send.Morse ships an update every 15 months, Sonar every 6 months. The most recent releases landed on September 25, 2026 and September 30, 2026 respectively.

Scorecard6 real differences · 4 level
Send.Morse versus Sonar: the parameters behind the verdict, then further details
ParameterSend.MorseSonar
Price$0.99Free — better
Rating2.0 (4 ratings) — better—
Positive reviews25.0% of reviews33.3% of reviews — better
Number of ratings4 — better—
Update frequencyEvery 15 monthsEvery 6 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.68.2 — better
Further details — not scored
Size6 MB5 MB
Age rating4+4+
Developerreizverstaerker medienwerkstatt OGKonstantinos Vogiatzakis

Customer experience

Send.Morse

All ratings4 ratings
Positive0.0%
Neutral50.0%
Negative50.0%
Written reviews4 reviews
Positive25.0%
Neutral25.0%
Negative50.0%

Sonar

All ratings6 ratings
Positive50.0%
Neutral33.3%
Negative16.7%
Written reviews3 reviews
Positive33.3%
Neutral66.7%
Negative0.0%

In-app purchases

None

Send.Morse

No in-app purchases

None

Sonar

No in-app purchases

Questions

Is Send.Morse free?
Send.Morse costs $0.99, with no in-app purchases.
Is Sonar free?
Sonar is free to download, with no in-app purchases.
Do Send.Morse or Sonar have ads?
Neither Send.Morse nor Sonar shows ads.
Which is updated more often, Send.Morse or Sonar?
Send.Morse ships an update every 15 months, and Sonar every 6 months. Most recently, Send.Morse was updated on September 25, 2026 and Sonar on September 30, 2026.

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