Comparison

MorseDecoder vs SDR

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

Head to head
About

MorseDecoder

This app decodes Morse code sounds directly from your device's microphone or headset input. It offers both automatic and manual decoding modes with adjustable parameters for optimal performance in various conditions.

Highlights
  • Morse code sound to text translation
  • Automatic and manual decoding modes
  • Adjustable audio filter frequency
  • Configurable WPM speed
  • Background noise threshold adjustment
  • Built-in spectrogram
  • Optional narrow-band DSP audio filter
Read full description

The HotPaw Morse Code Decoder translates Morse Code sound into text. Just use the microphone or headset input on your iPhone or iPad for the audio signal input, and watch decoded text appear. The Morse Code Decoder includes both an automatic decoding mode, plus manual controls to allow the decoding of weaker signals in noise and QRM. Manually adjustable parameters include the frequency of the audio filter, the WPM dot/dash speed used for detecting characters, the threshold level of background noise, and whether Farnsworth timing is to be used for detecting spaces between individual characters. The Morse Code Decoder includes a built-in spectrogram to help determine the audio frequency of the Morse Code tones. Use the optional narrow-band DSP audio filter to help filter out background noise. The audio filter works for tone frequencies from 300 to 2400 Hz. Please do not try to decode tones outside this range. The Morse code WPM (words per minute) detection speed is automatically adaptive from about 8 to 40 WPM, and can be locked to the current estimated WPM dot speed. You can also manually set the WPM code speed if the automatic speed detection guesses incorrectly. A QRQ High Speed WPM mode setting allows decoding much higher WPM speeds in the range of 30 to 80 WPM. Please aim your iPhone microphone at the Morse Code sound source so that the iPhone's noise cancelling microphone doesn't cancel it out. You can see if sound is getting to the iPhone by seeing a peak in the spectrum display. Please use the manual settings if automatic decoding does not adjust to the frequency, WPM. or background noise threshold level properly. Decoding will not work if the audio filter or WPM are set incorrectly, or there is a lot of background noise or room echoes above the threshold setting. Please see the help file on the HotPaw website for hints as to how to solve decoding issues.

About

SDR

Control your Icom radio remotely from your iPad, either at home via Wi-Fi or from anywhere over the internet. Features include spectrum scope, waterfall display, and full radio controls. Supports various Icom models and offers modes like FT8, JS8, and speech transcription.

Highlights
  • Remote radio control over Wi-Fi or internet
  • Spectrum scope and waterfall display
  • Full radio control interface
  • FT8, JS8, CW, and speech modes
  • Integrated logbook with iCloud sync
  • DX Cluster and band plan integration
Features
Read full description

Your Icom radio on your iPad: at home over Wi-Fi or from anywhere over the internet. Made by a ham, for hams, with personal support included. SDR-Control shows the spectrum scope and waterfall of your Icom radio with all its controls on the large iPad screen. No extra hardware or software needed. WORKS WITH ■ IC-705 (Wi-Fi) ■ IC-7610, IC-7760, IC-9700, IC-7300 MK2 and the IC-R8600 receiver (radio on your network by cable) The app connects over the network only. The older IC-7300 (without MK2) has no network connection and can't be used. OPERATE ■ Spectrum scope and waterfall with band plan, DX Cluster and FT8 spots ■ Two VFOs, filters, preamp, attenuator, NB, NR, notch, AGC and more ■ Compact floating panels: tuning, PTT, CW, memories, macros, Command Bar, DTMF, RIT / ∆TX, D-Star ■ Your iPad as microphone and speaker; the radio keeps playing in the background, also with the cover closed MODES ■ FT8-Improved with AutoAnswer and AutoCQ, plus the classic FT8 ■ JS8 keyboard chat ■ CW with decoder, keyer and CW keyboard ■ Speech: incoming voice transcribed and translated, your typed text sent as speech ■ SSTV, HF-Fax, APRS and WSPR FT8-Improved, JS8, Speech and WSPR need iPadOS 26. TOOLS ■ Logbook with ADIF import and export, shared via iCloud with SmartSDR, FT-Control, TS-Control and K4-Control, on iPhone, iPad, Mac and Apple Vision Pro ■ DX Cluster, POTA, PSK Reporter, Call Lookup, Band Plan, Network Stats, Memories, Scanning, S.A.T. ■ Controllers: MIDI, CTR2, HaliKey, Pryme, Flic ■ 4O3A Genius devices and Ultra Beam antennas MADE BY A HAM Made by Marcus, DL8MRE, who has been developing apps for Apple devices since 2009 and uses this app every day in his own shack, where all supported radios are on the desk. Personal online support and a detailed manual are included. Updates with new modes and features are free: no subscription, no in-app purchases. WHAT YOU NEED ■ One of the radios above, connected to your network ■ An iPad with iPadOS 18 or later ■ For use over the internet: access to your home network from outside (see the manual) Manual: https://go-to.me/sdrcontrol-ios-manual More apps: https://ham-radio-apps.com SDR-Control is developed independently and is not affiliated with or endorsed by Icom.

Screenshots

MorseDecoder1 screens

Verdict

The call

The clearest difference is price: MorseDecoder at $9.99 against SDR's $49.99. MorseDecoder also leads on device support (3 vs 1) and iOS requirement (12.3 vs 17.6). SDR's advantage is rating (4.3 vs 3.2) and update cadence (fortnightly vs every 3 months). On ratings volume, 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

MorseDecoder costs $9.99 and SDR $49.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SDR holds the better App Store score, 4.3 against 3.2. Both are backed by a comparable volume of ratings — 49 and 86 respectively. Written reviews point the same way: 55% of MorseDecoder's written reviews are positive against 77% of SDR's.

UpkeepUpdate frequency

MorseDecoder ships an update every 3 months, SDR fortnightly. The most recent releases landed on November 6, 2026 and November 12, 2026 respectively.

Scorecard7 real differences · 3 level
MorseDecoder versus SDR: the parameters behind the verdict, then further details
ParameterMorseDecoderSDR
Price$9.99 — better$49.99
Rating3.2 (49 ratings)4.3 (86 ratings) — better
Positive reviews54.8% of reviews77.4% of reviews — better
Number of ratings4986 — better
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS12.3 — better17.6
Further details — not scored
Size1 MB56 MB
Age rating4+4+
DeveloperHotPaw ProductionsMarcus Roskosch

Customer experience

MorseDecoder

All ratings49 ratings
Positive51.0%
Neutral8.2%
Negative40.8%
Written reviews104 reviews
Positive54.8%
Neutral3.8%
Negative41.3%

SDR

All ratings86 ratings
Positive82.6%
Neutral2.3%
Negative15.1%
Written reviews84 reviews
Positive77.4%
Neutral3.6%
Negative19.0%

In-app purchases

None

MorseDecoder

No in-app purchases

None

SDR

No in-app purchases

Questions

Is MorseDecoder free?
MorseDecoder costs $9.99, with no in-app purchases.
Is SDR free?
SDR costs $49.99, with no in-app purchases.
Which has better reviews, MorseDecoder or SDR?
SDR is rated higher. MorseDecoder averages 3.2 out of 5 from 49 ratings, while SDR averages 4.3 from 86 ratings.
Do MorseDecoder or SDR have ads?
Neither MorseDecoder nor SDR shows ads.
Which is updated more often, MorseDecoder or SDR?
MorseDecoder ships an update every 3 months, and SDR fortnightly. Most recently, MorseDecoder was updated on November 6, 2026 and SDR on November 12, 2026.

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