ISS Tracker vs SimpleSSTV

ISS Tracker: Real-Time Space Station Monitor Experience the International Space Station like never before with our comprehensive real-time tracking and telemetry monitoring app. Perfect for space enthusiasts, students, and anyone fascinated by space exploration. KEY FEATURES: LIVE TRACKING & ORBIT • Real-time ISS position tracking on an interactive world map • Current altitude, velocity, and orbital period • Precise latitude and longitude coordinates • Customizable map views (Standard & Satellite) COMPREHENSIVE TELEMETRY • Position & Attitude: Real-time altitude, velocity, yaw, pitch, and roll • Environmental Systems: O₂ levels, CO₂ levels, cabin pressure, and temperature • Power Systems: CMG momentum and status • Thermal Control: Loop A/B temperature and flow rates • Water Management: Clean water, waste water, and urine tank levels • Cooling Systems: Avionics and air cooling temperatures • Oxygen Supply: O₂ and N₂ tank pressure readings • Node Systems: Avionics temperature monitoring • EVA Systems: EMU voltage and current readings • Communications: Ku-Band status and video channels SMART FEATURES • Dark mode support for comfortable viewing • Intuitive interface designed for space enthusiasts • Real-time data updates • Professional-grade accuracy EDUCATIONAL VALUE: Perfect for: • STEM students learning about space technology • Space enthusiasts tracking ISS operations • Teachers demonstrating orbital mechanics • Anyone interested in space station operations Stay connected with humanity's outpost in space. Download ISS Tracker now and monitor the International Space Station's vital signs in real-time. Note: This app uses official telemetry data to provide accurate information about the International Space Station's systems and position.

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 • Perfect for portable operation, field day, and unattended stations 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 • Progressive line-by-line image preview during decode • 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 • Optional decode watermark stamps mode, timestamp, and callsign on received images • 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!