Comparison

DitDah Decoder vs Greyline FT8

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

Head to head
About

DitDah Decoder

Features
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DitDah Decoder is a professional-grade Morse code communication tool designed for amateur radio operators and CW enthusiasts. Using advanced technology, it decodes Morse code from audio in real-time and lets you send messages back. DECODE MORSE CODE • Real-time audio decoding from your microphone or use an external adapter to receive directly from your radio • Q-code and abbreviation translation • Saves audio recordings of your decoding sessions • Autocorrect button for reprocessing of saved audio files using neural networks SEND MORSE CODE • Type messages and transmit as Morse code audio • Adjustable frequency and speed (WPM) • Repeat send mode for calling CQ • Use an external adapter to transmit directly via your radio • Two people using the app can easily send messages back and forth on the air COMPLETE LOGBOOK • Automatic call sign detection with country lookup • Organized by date and call sign • Tap on any call sign to see stats • QSO tracking and confirmation • Adif export Whether you're a licensed amateur radio operator working CW on the bands or learning Morse code, DitDah Decoder provides the tools you need for two-way Morse communication.

About

Greyline FT8

This app provides a portable digital ham radio experience for field operations on iOS devices. It automates callsign lookups, displays real-time spot data, and offers automated calling or manual control for QSOs. Features include intelligent frequency selection, audio delay adjustment, and direct logging to QRZ.

Highlights
  • Field-ready digital ham radio
  • Automated callsign and DXCC lookups
  • Real-time PSK Reporter spot data
  • Automated CQ Gatherer and Hunter modes
  • Intelligent automatic frequency selection
  • Direct-to-QRZ logging and ADI export
Features
Currently charting
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Greyline FT8 is a highly portable, capable amateur radio app designed specifically for field operation with an iOS device. I designed this app because I got very used to my full-stack FT8 solution: GridTracker, WSJT-X, PSK Reporter, WRL Desktop, several browser tabs, and more. But I didn't want the bulk and weight of a full Windows PC in the field. At the same time, while there are excellent and lightweight FT8 iOS solutions out there, they were lacking features I really wanted. Greyline is everything you need and nothing you don't. It automatically locates your grid square, performs callsign and calling station DXCC lookups (internet access required), and can even show you real-time spot data from PSK Reporter. Want to adjust your directional antenna? Now you've got the info you need to do it! Greyline also incorporates automated calling features. Gatherer mode calls CQ, responds to the first reply it gets, finishes the QSO and returns to calling CQ all without your input. On the other side of things, Hunter mode listens for CQ calls and pounces on them, finishing a QSO then returning to the live band to find the next. Or, take control of the conversation yourself with standard mode. That's the experience you're already used to from WSJT-X and other digital mode apps. Some other noteworthy features are: - Intelligent automatic free frequency selection - Dynamically adjusted audio delay for virtually drift-free message timing - PSK Reporter integrated Live Spots - Direct-to-QRZ, WRL and private Cloudlog logging and ADI export - Configurable waterfall settings - CQ addendums - CQ filtering for contesting and general courteous operation - Configurable retransmissions - Intelligent log recovery (didn't get that last 73 but want to log the contact anyway? Now you can!) - Log import and export - Antenna tuning - POTA Autospotting - One touch POTA activation and POTA.app-compatible ADIF export - Multiple POTA activation support - And so much more! Greyline uses audio VOX and not serial PTT. Most radios support this with simple cabling or an audio interface like a Digirig. For helpful tips on cabling and configuring popular radios, visit the Support URL below. Built by a ham, for hams, I'm very open to your feedback and hope Greyline can be your field companion. Want to share your own Field Notes (https://greylineft8.com/fieldnotes.html)? Email me at support@greylineft8.com!

Screenshots

DitDah Decoder4 screens
Greyline FT84 screens

Verdict

The call

The clearest difference is price: Greyline FT8 at $3.99 against DitDah Decoder's $19.99. Greyline FT8 also leads on update cadence (every 4 days vs monthly) and chart position (#145 vs unranked). DitDah Decoder's advantage is iOS requirement (18.4 vs 26.5). On 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

DitDah Decoder costs $19.99 and Greyline FT8 $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

DitDah Decoder ships an update monthly, Greyline FT8 every 4 days. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

Scorecard4 real differences · 7 level
DitDah Decoder versus Greyline FT8: the parameters behind the verdict, then further details
ParameterDitDah DecoderGreyline FT8
Price$19.99$3.99 — better
Rating—4.8 (12 ratings) — better
Positive reviews—90.0% of reviews
Number of ratings—12 — better
Update frequencyMonthlyEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
Best chart rank—#145 — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.4 — better26.5
Further details — not scored
Size29 MB18 MB
Age rating4+4+
DeveloperTimothy DiehlJONATHAN MARK SCHULMAN

In-app purchases

None

DitDah Decoder

No in-app purchases

None

Greyline FT8

No in-app purchases

Questions

Is DitDah Decoder free?
DitDah Decoder costs $19.99, with no in-app purchases.
Is Greyline FT8 free?
Greyline FT8 costs $3.99, with no in-app purchases.
Do DitDah Decoder or Greyline FT8 have ads?
Neither DitDah Decoder nor Greyline FT8 shows ads.
Which is updated more often, DitDah Decoder or Greyline FT8?
DitDah Decoder ships an update monthly, and Greyline FT8 every 4 days. Most recently, DitDah Decoder was updated on October 2, 2026 and Greyline FT8 on October 3, 2026.

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