SimpleSSTV vs Club Log

SimpleSSTV is a native iOS app for encoding, decoding, and live-transmitting slow-scan television (SSTV) signals — the method ham radio operators use to share images over audio frequencies. Slow-scan television converts images to audio tones. Each pixel's brightness becomes a specific frequency between 1500-2300 Hz. Sync pulses at 1200 Hz mark line boundaries. The result is an audio signal you can transmit over any voice-capable radio, or record for later playback. SSTV has been used by amateur radio operators since the 1950s. It's still actively used today on HF bands, VHF repeaters, and for receiving images from the International Space Station. ENCODING (Image → Audio) • Load any image from your photo library, camera, or Files • Automatic resize and crop to SSTV resolution • 21 supported modes covering all major SSTV formats • Real-time encoding with progress visualization • Play audio directly through speakers for VOX-triggered transmission • Export to WAV or M4A for later use • Optional FSK ID and CW ID (Morse code) callsign transmission • Test pattern generator for signal testing LIVE CAMERA MODE • Real-time camera feed with front/back camera switching • Three trigger modes: Continuous, Motion-triggered, or Periodic interval • Adjustable motion sensitivity with adaptive background model • Captures and encodes directly from camera to audio • Keep the app in the foreground while listening or transmitting DECODING (Audio → Image) • Load WAV, M4A, or MP3 audio files containing SSTV signals • Live microphone capture for real-time SSTV reception • Automatic mode detection via VIS code identification • Capture a transmission, then process it to see the decoded image • FSK callsign detection from received signals • Precision audio trimming with dual-view waveform editor • Re-decode saved images with different mode, sync offset, or slant correction • Handles real-world signal imperfections: timing drift, noise, sample rate variations • Decode watermark with an automatic stamp or custom Pro text • Waterfall spectrogram display shows signal frequency over time SUPPORTED MODES (21 total) • Martin M1, M2, M3, M4 • Scottie S1, S2, S3, S4, DX, DX2 • Robot 36, Robot 72, Robot BW8 • PD50, PD90, PD120, PD160, PD180, PD240, PD290 • Wraase SC2-180 ISS SSTV EVENTS • Get notified when the International Space Station transmits SSTV images • Automatic alerts before and during events, with frequency, mode, and callsign info • Info card on the decode tab with event details and countdown FAQ & SETUP TIPS • Practical advice on audio setup and USB adapters • Decode quality troubleshooting • Quick reference for all 21 SSTV modes IMAGE LIBRARY • Automatic saving of encoded and decoded images • Grid view with full preview, metadata, and sharing • Re-decode any saved image with different settings • Filter by encoded or decoded 10 LANGUAGES Available in Arabic, Chinese (Simplified), Dutch, English, French, German, Polish, Portuguese (BR), Spanish, and Turkish — with full right-to-left support. PRIVACY No accounts, no analytics, no tracking. Your images and audio stay on your device. Free to encode and decode. Optional one-time Pro purchase unlocks watermark customization and Listening Station Mode. We do not use, sell or share your data for advertising or marketing purposes. Be aware: Encoded images are audio signals — anyone receiving the audio can decode them! REQUIREMENTS • iOS 17.6 or later • Camera access for live mode • Microphone access for live decode Built by a ham radio operator for ham radio operators. 73!

The companion app for Club Log, the logbook and DXCC award service used by 100,000 amateur radio operators worldwide. Sign in with your existing Club Log account to carry your logbook, award progress, and DX-chasing tools in your pocket. YOUR DX DASHBOARD Start with DX Dash: a single at-a-glance view of your recent QSOs, activity heatmap, per-band DXCC progress, and highlights from your log. NEED CHECK Instantly answer the question every DXer asks: “Do I need this one?” Look up any callsign, prefix, or DXCC entity and see worked, confirmed, and verified status across bands and modes. Filter by your enabled bands. AWARD PROGRESS • DXCC Charts: entity-by-entity progress with QSL status breakdown • CQ Zones: WAZ zone progress with an interactive zone map • Grid Squares: Maidenhead locator coverage across bands and modes • Leagues: DXCC league tables and band breakdowns • Most Wanted: the global Club Log Most Wanted list, with per-entity band/mode analysis LIVE ON THE AIR • Live Bands: unique to the app, see which bands are open right now from real QSOs, spots and skimmer feeds, with a band × continent activity heatmap - all filtered through your own log to help you find new DXCCs and slots to work • Livestreams: watch live DXpedition streams and follow QSOs on the map as they happen • Live Alerts: built on real-time notifications, with an alert history, expedition watches, and a pinned watchlist in one place YOUR LOGBOOK Browse, search, and filter your Club Log QSOs. Log new contacts from your phone and sync them to Club Log if you're away from your normal logging computer. Inspect reciprocal log matches, explore QSO timelines, and review OQRS request status. Upload and download ADIF files directly on your device. PROPAGATION & RESEARCH Propagation charts correlate solar flux with real activity evidence from Club Log’s logs. The Propagation Wizard overlays VOACAP predictions on your route. Prefixes gives you an offline DXCC reference. DXpeditions lists active and recent expeditions. Call Tester resolves callsigns, locators, and sun position. A daily Club Log DX Report and an annual DX Calendar are provided so you can keep track of what activity is on the bands. The DX Calendar includes a feed of upcoming DX, delivered in partnership with the team at DX-World.net with their generous support. BUILT FOR DXERS WORLDWIDE • Customizable tab bar: pin your four most-used tools • Multiple callsigns: switch between all logs on your account • 20+ interface languages: ham-radio terms (QSO, DXCC, CW, etc.) stay in standard English • Face ID / Touch ID lock for your session • iPhone and iPad layouts including full mobile-first versions of the Expedition Charts, light and dark modes • Translated into 22 international languages Requires a free Club Log account at clublog.org. Terms of Use: Use of this app and its associated subscription service is subject to the End User License Agreement (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/