Comparison

Sonic Remote vs CoronaSDR

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

Head to head
About

Sonic Remote

Control SM Series Wireless Transmitters with voice commands and audio signals from your iPhone or iPad. Adjust settings like sleep mode, power, audio gain, and frequency. Supports multiple languages for voice commands.

Highlights
  • Audio signal control
  • Voice command operation
  • Multiple language support
  • Adjustable power and gain settings
  • Frequency selection
  • Dark mode support
Read full description

Remote Control for the SM Series Wireless Transmitters with Voice Output. Quick and easy remote control for your SM Series transmitters by sending a coded audio signal through an attached microphone with your iPhone oriPad. Includes sounds for : - Sleep mode (on / off) - Lock mode (lock / unlock) - Power mode (25mW / 50 mW / 100 mW / 250 mW) - Audio gain (0 - 44) - Frequency Mode (486.400 - 870.375 MHz / Block 19 - 33) - Lowcut frequency (35 - 150 Hz) - LED (on/off) All sounds can be played with an optional voice command in multiple languages  (English, German, French, Chinese, Japanese, Spanish and Portuguese). The voice commands can be changed individually for each language. Frequencies can be selected by block and channel or entered alphanumerically in 100 kHz or 25 kHz steps. It is also possible to control a transmitter with different frequency blocks by entering the hexadecimal value (0 - F).  However, the displayed frequency will not match the actual frequency set. SonicRemote supports dark mode and a volume control that is not connected to your device's mute switch. Due to regional settings, the power sounds may not work as intended. In this case, an alternative set can be used Your receiver must be software and hardware enabled for remote control.  Some of the implemented features may not be supported due to series or software version.

About

CoronaSDR

Explore the radio spectrum and decode signals directly from your iPhone or iPad. This app connects to an RTL-SDR receiver, offering live tuning, audio, spectrum, and waterfall displays. It also features experimental CW and FT8 decoding capabilities.

Highlights
  • Live spectrum and waterfall displays
  • AM, FM, USB, LSB, CW reception
  • CW and FT8 decoding
  • Station saving and management
  • Receiver adjustment controls
  • Background listening
Features
Read full description

Explore the radio spectrum from your iPhone or iPad. CoronaSDR connects to an RTL-SDR receiver through a rtl_tcp server on your local network, bringing live tuning, audio, spectrum, and waterfall displays to your screen. LISTEN AND EXPLORE • Receive AM, narrow FM, wide FM stereo, USB, LSB and CW. • Find signals with the live spectrum and waterfall. • Tune by dragging across the spectrum and adjust receive bandwidth, squelch, and gain. • Scan saved stations or a frequency range. • Keep listening in the background with system playback controls. NEW: CW AND FT8 DECODING • Turn a selected CW signal into text, with listening-pitch and decoding-speed controls. • Receive FT8 messages with a message history, details, and text sharing. • Mute listening audio while decoding continues in the foreground. • Freeze displayed results to read them while reception continues. CW and FT8 decoding are receive-only and currently experimental. Decoding requires an active receiver connection and pauses when the app moves to the background. Some signals and messages may be missed. FT8 reception times are estimates. SAVE YOUR STATIONS • Organize favorites with tags. • Import and export station lists in CSV or TSV format. • Return to saved frequencies and listening modes. ADJUST YOUR RECEIVER • Set gain and frequency correction in PPM. • Control direct sampling, offset tuning and bias tee where supported by your receiver and server. • Adjust audio filters, audio gain control and noise blanking. • Use deep links to open listening actions. REQUIREMENTS • iPhone or iPad running iOS 18 or later. • An RTL-SDR receiver connected to a running rtl_tcp server on your local network. • A suitable antenna for the signals you want to receive. Receiver hardware, antenna, and server are required separately. Available frequencies and reception quality depend on your equipment and setup. CoronaSDR is free and open source.

Screenshots

Sonic Remote4 screens
CoronaSDR3 screens

Verdict

The call

The clearest difference is price: CoronaSDR at Free against Sonic Remote's $8.99. CoronaSDR also leads on rating (5.0 vs 4.0) and update cadence (every 2 weeks vs every 26 months). Sonic Remote's advantage is iOS requirement (16.0 vs 18.0). On review sentiment, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

CoronaSDR is free to download; Sonic Remote costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

CoronaSDR holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: CoronaSDR has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Sonic Remote ships an update every 26 months, CoronaSDR every 2 weeks. The most recent releases landed on November 2, 2026 and November 9, 2026 respectively.

Scorecard6 real differences · 4 level
Sonic Remote versus CoronaSDR: the parameters behind the verdict, then further details
ParameterSonic RemoteCoronaSDR
Price$8.99Free — better
Rating4.0 (1 ratings)5.0 (10 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings110 — better
Update frequencyEvery 26 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better18.0
Further details — not scored
Size5 MB5 MB
Age rating4+4+
DeveloperRahmenfutter UG (haftungsbeschränkt)Alien Systems S.R.L.

Customer experience

Sonic Remote

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

CoronaSDR

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Sonic Remote

No in-app purchases

None

CoronaSDR

No in-app purchases

Questions

Is Sonic Remote free?
Sonic Remote costs $8.99, with no in-app purchases.
Is CoronaSDR free?
CoronaSDR is free to download, with no in-app purchases.
Which has better reviews, Sonic Remote or CoronaSDR?
CoronaSDR is rated higher. Sonic Remote averages 4.0 out of 5 from 1 ratings, while CoronaSDR averages 5.0 from 10 ratings.
Do Sonic Remote or CoronaSDR have ads?
Neither Sonic Remote nor CoronaSDR shows ads.
Which is updated more often, Sonic Remote or CoronaSDR?
Sonic Remote ships an update every 26 months, and CoronaSDR every 2 weeks. Most recently, Sonic Remote was updated on November 2, 2026 and CoronaSDR on November 9, 2026.

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