Kardiacs: Group Ride & Maps

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.

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
• Plan a ride ahead and send the link: where, when, and a code to scan at the start

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
• Or pick a classic: the best-known climbs, races, gravel roads and trails, with today's conditions
• 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
• Drive to the trailhead with the same turn-by-turn
• Weather before you go: hourly, wind on your route, UV, air quality and alerts

TRAIN
• Set a goal, from a mile to an ultra or a century to 200 miles, and get a plan that adapts to how recovered you are
• Strength sessions: the plan's lifts with target weight, reps and rest, each set spoken as you go
• You pedal, it sets the watts: ERG control of Bluetooth smart trainers
• Ride any route indoors, from your local loop to the Stelvio: your smart trainer sets every climb's gradient as the map follows you
• 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

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
• Every ride says how much of it was new ground, and when it was your best
• Critical Power and W′ learned from every ride, with their likely range; critical pace and VO₂max too

SHARE THE RIDE
• Fly your ride: a video that follows you across satellite terrain, with your photos popping where you took them, ready for your Instagram Story or TikTok

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
• Open FIT, TCX and GPX files, or bring your history from 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 and indoor route rides need 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.