iEFIS Light vs Red Grid Link

iEFIS LIGHT A portable EFIS solution for iPhone and iPad and the iLEVIL SW AHRS. Connect your iPhone or iPad by Wifi with the iLEVIL AHRS system and get a usable PFD on your iPhone or iPad. Features: Groundspeed in knots, km/h or mph GPS altitude displayed in feet or meters (switchable by one touch of display) Course rose can be pinched, full 360 degree display or 80 degree arc view Course rose displays True/Magnetic Heading and True/Magnetic Track (switchable by touching course window) Attitude Indicator can be calibrated by touching „V bar“. For simulation purposes the iPhone’s/iPad’s internal sensors and GPS can be used. For further information visit www.airwork.biz

Your team. Your grid. No cell towers. No servers. No accounts. ATAK costs nothing but demands a TAK Server, Android-only deployment, and an IT team to run it. Red Grid Link delivers the core capabilities — encrypted team position sharing, MGRS-native navigation, offline maps, and tactical reports — on any iPhone, with zero infrastructure. Open the app. Start a session. Your team appears on the map. Built by an active duty Army officer for SAR teams, hunting parties, backcountry groups, and civilian units that need blue-force tracking without the bureaucracy. FIELD LINK — ENCRYPTED TEAM SYNC: Devices within Bluetooth range auto-discover each other and share encrypted positions, waypoints, and markers in real time. - AES-256-GCM encryption with ECDH P-256 ephemeral session keys - Live position updates every 5-30 seconds (battery-adaptive) - Cross-platform: iPhone and Android in the same session - Zero pairing, zero configuration, zero accounts - 2-device free tier, up to 8 devices with Pro+Link MGRS NAVIGATION: Live 10-digit Military Grid Reference System precision — the same coordinate system used by NATO forces worldwide. - 4/6/8/10-digit MGRS display (1-meter precision) - MGRS grid overlay at all zoom levels - Magnetic declination (WMM model) - NATO phonetic voice readout for hands-free grid calls OFFLINE MAPS: Download topographic regions over WiFi. Navigate completely offline. USGS Topo and OpenTopoMap coverage with MGRS grid rendering at every zoom level. EMERGENCY BEACON: One-tap SOS sends your GPS to every teammate. Full-screen alert with distance and bearing. Retransmits every 30 seconds until cancelled. TACTICAL MESSAGING: 8 pre-canned tactical messages plus free text. HELP, STOP, RALLY ON ME, ALL CLEAR, and more. One tap to send across the team. TEAM ROLES & COORDINATION: - Assign Lead, Scout, Medic, Comms, or custom roles with callsigns - Share waypoints with the team or keep them private - Draw boundaries and get alerted when anyone crosses them - Drop markers for hazards, rally points, objectives, or caches - Ghost markers show last-known positions when teammates go out of range 11 TACTICAL TOOLS: Dead Reckoning, Two-Point Resection, Pace Count, Back Azimuth, Coordinate Converter (MGRS / Lat-Lon / DMS / UTM / FixPhrase), Range Estimation, Slope Calculator, ETA / Speed, Magnetic Declination, Celestial Navigation, MGRS Precision Reference. AFTER-ACTION REPORTS: One-tap PDF export: map snapshot, mission timeline, per-member tracks, markers, team roster, and boundary events. 4 TACTICAL DISPLAY THEMES: Red Light (night vision safe), NVG Green (night observation device compatible), Day White (high visibility), and Blue Force (tactical blue display). 4 OPERATIONAL MODES: One engine, four presentation layers. Terminology and quick actions adapt to your mission: Search & Rescue, Backcountry, Hunting, or Training. ZERO FOOTPRINT PRIVACY: - No accounts, no sign-up, no login - No cloud, no servers, no analytics, no tracking, no ads - Location data stays on your device - Field Link data is ephemeral — nothing persists after the session ends - All team communication encrypted with AES-256-GCM PRICING: - Free: 4 modes, 2-device team sync, 1 map region, Red Light theme, 11 tools - Pro ($3.99/mo or $29.99/yr): All 4 themes, unlimited maps, After-Action Reports - Pro+Link ($5.99/mo or $44.99/yr): Pro + 8-device team sync - Lifetime ($149.99, one-time): All Pro+Link features forever Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. Manage subscriptions in Settings > Apple ID > Subscriptions. Terms: https://redgridtactical.com/terms.html Privacy: https://redgridtactical.com/privacy.html