Comparison

EchoLink vs SSTV Slow Scan TV

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

Head to head
About

EchoLink

Connect to the EchoLink network using your iOS device. This application allows validated Amateur Radio operators to access the system from virtually anywhere. Registration with a valid Amateur Radio callsign is required.

Highlights
  • Connect to EchoLink network
  • Use on iPhone, iPad, iPod touch
  • Validated user access
  • Remote connectivity
Features
Read full description

Please note: This app is for licensed Amateur Radio operators only. See www.echolink.org for more information. EchoLink for iOS provides access to the EchoLink network for validated EchoLink users. You can use this app to connect to the EchoLink system from almost anywhere, using an iPhone, iPad, or iPod touch. If you are not already a validated EchoLink user, you will be required to register (using your Amateur Radio callsign and a password of your choice) the first time you run the app. Please see the iPhone FAQ at www.echolink.org. Please direct any bug reports or feature suggestions to the Web site at http://www.echolink.org/support.htm, since developers do not read app reviews. If you are interested in becoming a licensed Amateur Radio operator, see www.arrl.org for more information. EchoLink is a registered U.S. trademark of Synergenics, LLC.

About

SSTV Slow Scan TV

Decode and display amateur radio SSTV transmissions directly on your mobile device. Supports various popular SSTV modes and allows for automatic or manual decoding. Save, share, and even transmit your own SSTV images.

Highlights
  • Decode SSTV transmissions
  • Display received images
  • Support for popular SSTV modes
  • Automatic and manual decoding
  • Save and review received images
  • Transmit custom SSTV images
  • Add text to transmitted images
Features
Currently charting
Read full description

Want to display or send SSTV transmissions, without using a bulky computer? SSTV Pad lets you decode and display Ham (Amateur) Radio SSTV (Slow Scan TV) transmissions. Just connect your device to an HF radio (or even set it next to the radio's speaker), tune in an SSTV frequency, and watch the pictures. SSTV Pad decodes all of the popular SSTV modes, including Robot, Scottie, Martin, and more. Some modes are receive only. Decoding of SSTV transmissions begins automatically as soon as the start of image audio signals are detected, and the image format is automatically selected. Manual control is also available for use when receiving conditions are poor. Timing signals (phase and skew) can be adjusted to compensate for mismatches with the sending station. Received images can be saved - including automatically as they are received. You can leave the app running unattended, and come back to view all the received images. You can review saved images, as well as send them via email, and use iTunes file sharing to transfer them to your computer. You can even share them on your Facebook page, or tweet them to your followers, directly from the app! (iOS 6 and later) You can also transmit images, taken from your saved photos or taken with your device's camera. Text, such as your callsign, can be added to the sent image. Buy your copy right now, and start decoding and displaying SSTV transmissions in minutes. Just set your iPhone or iPad next to the radio speaker, and watch the pictures come rolling in. Note: If you cannot see the transmit button, go to the Accessibility settings for your device and turn Button Shapes OFF. It makes the buttons too large so you cannot see them all. Also, It is very important to have a well tuned signal of good quality, and make sure you get the audio from your radio to your device without adding additional distortion, or auto start and mode detect will not work optimally. Please see this page for tips on using the app and connecting your radio: http://www.blackcatsystems.com/ipad/iPad_SSTV_Pad_FAQ.html You can also use Bluetooth audio devices to feed audio into your device. Please be sure to use a good quality Bluetooth device, that does not distort the audio. Modes supported for reception (not all modes can be transmitted): B&W 8 sec B&W 12 sec B&W 24 sec B&W 36 sec Martin M1 Martin M1 Martin M2 Martin M3 Martin M4 MP73" MP115 MP140 MP175 MR73 MR90 MR115 MR140 MR175 PD 50 PD 90 PD 120 PD 160 PD 180 PD 240 PD 290 Robot 12C Robot 24C Robot 36C Robot 72C SC-1 32 sec SC-1 16 sec SC-1 8 sec SC-2-60 SC-2-120 SC-2-180 Scottie S1 Scottie S2 Scottie S3 Scottie S4 Scottie DX

Screenshots

EchoLink3 screens
SSTV Slow Scan TV1 screens

Verdict

The call

The clearest difference is price: EchoLink at Free against SSTV Slow Scan TV's $3.99. SSTV Slow Scan TV's advantage is chart position (#65 vs unranked) and ratings volume (147 vs 41). On rating, review sentiment, update cadence and ads 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

EchoLink is free to download; SSTV Slow Scan TV costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.0 for EchoLink against 3.9 for SSTV Slow Scan TV. Both are backed by a comparable volume of ratings — 41 and 147 respectively. Written reviews are what separate them: 62% of EchoLink's written reviews are positive against 56% of SSTV Slow Scan TV's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. Both last shipped on September 22, 2026.

Scorecard5 real differences · 6 level
EchoLink versus SSTV Slow Scan TV: the parameters behind the verdict, then further details
ParameterEchoLinkSSTV Slow Scan TV
PriceFree — better$3.99
Rating4.0 (41 ratings) — better3.9 (147 ratings)
Positive reviews61.7% of reviews — better55.8% of reviews
Number of ratings41147 — better
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank—#65 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.06.0 — better
Further details — not scored
Size20 MB2 MB
Age rating4+4+
DeveloperSynergenics, LLCBlack Cat Systems

Customer experience

EchoLink

All ratings41 ratings
Positive68.3%
Neutral12.2%
Negative19.5%
Written reviews381 reviews
Positive61.7%
Neutral12.1%
Negative26.2%

SSTV Slow Scan TV

All ratings147 ratings
Positive72.8%
Neutral9.5%
Negative17.7%
Written reviews163 reviews
Positive55.8%
Neutral12.3%
Negative31.9%

User reviews

EchoLink

From 41 App Store ratings

What we love

  • 🚀 Wonderful System
  • 🚀 Great for ham travelers
  • 🚀 Amazing App
  • 🚀 Great tool for Hams
  • 🚀 Excellent System

Room to improve

  • 🐛 EchoLink does not work
  • 🐛 Can't find stations!
  • 🐛 Not working on ios26 iPhone pro max
  • 🐛 Mic gain
  • 🐛 Connectivity problems lately

SSTV Slow Scan TV

From 147 App Store ratings

What we love

  • 🎯 Simple and intuitive user interface
  • 📡 Effective SSTV decoding from radio signals
  • 🚀 No cables or special hardware required
  • 📸 Successfully captures ISS transmissions
  • 💰 Affordable price point

Room to improve

  • 🐛 Frequent crashes on modern iOS versions
  • ⚠️ App crashes when accessing camera function
  • 🔴 Crashes immediately on launch (intermittent)
  • ❌ Transmit feature broken with '(null)' watermark
  • 🚫 Limited transmission mode support

Bugs and requests

EchoLink

Reported bugs

13 issues
  • Latest version (2.19) could use some improvement
  • No way to reset password
  • Doesn't seem to be working on my phone, I enter call sign, password, and email. I click on login and nothing happens
  • Just updated EchoLink to find that it's now stuttering all the time
  • After the upgrade there are connection issues
Show 8 more
  • No support for passwords longer than 14 characters
  • The app won't allow me back in to validate my information
  • Doesn't work on iphone
  • Unable to Use; Password Too Long
  • Cannot connect to local reapeater
  • Can't close app
  • Latest update issues
  • Cannot connect

Requested features

13 requests
  • Bigger PTT please?
  • Add more to app
  • Password reset in app option
  • Almost There!
  • Bigger PTT please?
Show 8 more
  • Searching for call sign s
  • Not able to connect with 14.4 iOS upgrade
  • Mac version
  • Dark Mode Wonky
  • Missing Nodes
  • Echolink multitasking
  • Needs a help or tutorial
  • Needs full sysop node server capabilities

SSTV Slow Scan TV

Reported bugs

21 issues
  • App crashes when selecting camera to take photo
  • App crashes on second launch after first use
  • Crashes immediately on startup (intermittent)
  • Incompatible with iPhone 15 Pro and newer models
  • Crashes on iOS 13.1.2 and later versions
Show 16 more
  • Crashes on iOS 17
  • Transmit displays '(null)' watermark on images
  • Auto-start triggers on random ambient noise
  • Auto-detect mode fails or makes incorrect detections
  • Phase and skew sliders move after finger release
  • Phase slider gets stuck and won't move
  • Only decodes top-right section of image
  • Image quality is poor and distorted
  • Save to Photos function doesn't work on macOS
  • Save function loses images without saving
  • Received images disappear after 5 seconds
  • Audio cable input does not work
  • Auto-start and auto-mode features non-functional
  • Transmit button off-screen on iPad
  • Setup button missing on iPad
  • Poor decoding quality compared to Android alternatives

Requested features

17 requests
  • Automatic message encoding detection during receive
  • Code sound indicator for transmission mode
  • Support for all SSTV transmission modes (PD modes, PAD, MR)
  • Modern, updated user interface
  • Auto-detection of SSTV mode
Show 12 more
  • Auto-skew correction
  • Ability to save raw image data for post-processing
  • Save images to both app and camera roll simultaneously
  • Audio file input support (not just live microphone)
  • Auxiliary audio input support
  • Less sensitive phase and skew controls
  • Reset button for phase and skew adjustments
  • Ability to disable '(null)' text overlay without workaround
  • Mode lock feature to prevent accidental mode changes
  • Better image quality decoding
  • Apple Watch support
  • macOS audio device selection

In-app purchases

None

EchoLink

No in-app purchases

None

SSTV Slow Scan TV

No in-app purchases

Questions

Is EchoLink free?
EchoLink is free to download, with no in-app purchases.
Is SSTV Slow Scan TV free?
SSTV Slow Scan TV costs $3.99, with no in-app purchases.
Which has better reviews, EchoLink or SSTV Slow Scan TV?
EchoLink is rated higher. EchoLink averages 4.0 out of 5 from 41 ratings, while SSTV Slow Scan TV averages 3.9 from 147 ratings.
Do EchoLink or SSTV Slow Scan TV have ads?
Neither EchoLink nor SSTV Slow Scan TV shows ads.
Which is updated more often, EchoLink or SSTV Slow Scan TV?
EchoLink ships an update every 4 months, and SSTV Slow Scan TV every 4 months. Most recently, EchoLink was updated on September 22, 2026 and SSTV Slow Scan TV on September 22, 2026.

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