Kardiacs: Run, Ride, Social
Kardiacs LLC
Lose the signal. Keep the group. Your group can talk, chat and share one live map phone to phone — with no signal, no server and no account. Up to 200 m rider to rider, and further as phones relay it down the line. Plus everything else the ride needs: offline turn-by-turn, loops sized to your time, smart-trainer workouts that set the watts for you, and a daily readiness call from your sleep and HRV. Free, paid for by ads. Nothing to buy. RIDE TOGETHER, OFF THE GRID • Join with a QR code. No account, no signal, no server in between • Talk hands-free or push-to-talk, end-to-end encrypted • Everyone on one live map. A run or walk group is paced for its slowest • What you say is typed into the chat too, for anyone out of voice range • The leader's route reaches every phone. Anyone can ask for a stop or call for help SAY IT. IT'S WRITTEN DOWN. • Riding alone? Unmute and talk: the gate, the water, the bad corner becomes a note • Recognized on your iPhone, and kept there FIND YOUR WAY • Got 45 minutes? Get loops from your door, with the climb and effort up front • Every turn spoken aloud, on maps you download for anywhere on Earth. No signal needed • Wandered too far? Tap back and be home by the time you set • Commute fast without arriving drenched • Weather before you go: hourly, wind on your route, UV, air quality and alerts TRAIN • You pedal, it sets the watts: ERG control of Bluetooth smart trainers • Every workout scaled to your own fitness: Critical Power for rides, critical speed for runs • Build your own, on your phone or on a big screen at app.kardiacs.com • AI Workout Mixes: a playlist beat-matched to your cadence, made on your iPhone by Apple Intelligence • Schedule sessions with a reminder before each one RECOVER • Rest day or hard day? Readiness from your sleep, HRV and stress, worked out on your iPhone • Every session analyzed: power, pace and heart-rate zones • Your fitness over time: Critical Power, W′, critical pace and VO₂max ON YOUR WRIST, ON THE BIG SCREEN • Apple Watch: zones, turn-by-turn and music, without touching your phone • iPad shows your library, plan and power curve side by side • Plan routes on the web with climb, wind and aero drag worked out WORKS WITH WHAT YOU HAVE • Apple Health, both ways • Bring your history from FIT files or a Strava or Garmin archive • Send routes and workouts to your bike computer WHERE YOU RIDE STAYS YOURS • Your GPS position is stripped from every activity before it syncs • Planned routes, saved addresses and health data stay on your iPhone • Group rides go phone to phone. They never reach us • No sign-up wall. Delete your account, and everything in it, any time Notes: Group voice needs iPhone 12 or later on iOS 26.4+, with other iPhones; map and chat work with any phone running Kardiacs. Range varies with terrain. ERG needs a Bluetooth FTMS or Wahoo smart trainer. Weather by Apple Weather. Music features need the Apple Music app; AI Workout Mixes need Apple Intelligence. In 23 languages. Ages 16+; 18+ for accounts and structured workouts.
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