# Kardiacs: Trainer & Route Nav — Ride, run, walk — offline maps > Personalized indoor/outdoor training, navigation, and group rides with offline capabilities. (iPhone/iPad app by Kardiacs LLC.) - Source: https://appshunter.io/ios/app/kardiacs-trainer-and-route-nav/id6792439405 (this page in markdown: same URL + `.md`) - Developer: [Kardiacs LLC](https://appshunter.io/developer/6792439407) - Category: Health & Fitness, Navigation - Price: Free - Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed - Age rating: 17+ - Requires: iOS 18.0 · 77 MB - Languages: American English, Arabic, Dutch, French (France), German (Germany), Hindi, Indonesian, Irish, Italian, Japanese and 13 more - Released: 2026-08-14 - Data updated: 2026-09-21 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/kardiacs-trainer-and-route-nav/id6792439405/reviews.md ## What is Kardiacs? Kardiacs is your training partner for riding, running and walking — indoors on a smart trainer or treadmill, outdoors on roads and trails. No sign-up wall: open it and start — and your recorded GPS never leaves your phone. Every workout is personalized. Kardiacs models your fitness with Critical Power (CP/W′) and adapts power targets, pace targets and heart-rate zones to you — from your history, Apple Health, or a quick profile. RIDE TOGETHER, OFF THE GRID • Form a group in person with a QR code — no signal, no account, no server in the middle • Every rider on one map, with their training numbers on their card • Talk to the whole group hands-free or push-to-talk, end-to-end encrypted • Group chat with camera photos, over the same phone-to-phone radios • What you say is written into the chat too, by your own phone — so it reaches a rider your voice can't, and is read aloud so nobody looks down • The leader's route reaches every phone; any rider can ask for a stop — a café, water, a bike shop — or call for help NOTES WITHOUT STOPPING • Not in a group? Unmute and talk: what you say becomes a note, written down on your phone • Snap a junction or a gate number — a photo is a note with no words • Every ride's notes and conversations are kept together under Settings → Chat & Notes, to read, export or delete OUTDOOR SESSIONS • Explore: drop a pin, pick a workout, and get loops that fit it • Commute: plan A-to-B routes from stops and saved routes • Long-press a café, park or bike shop to make it a stop — your route re-plans through it • Restrooms and drinking water near your route, with one-tap stops through the nearest • Turn-by-turn cues spoken aloud, on the phone and on the wrist • Routing runs on your device: download a map, then plan, reroute and navigate with no signal at all • Take anywhere on Earth with you: search a place, see the size, and download its map — as many as you like MUSIC THAT MATCHES YOUR EFFORT • Apple Music controls in your session, and AI Workout Mixes: a playlist beat-matched to your cadence or stride, curated on device by Apple Intelligence INDOOR TRAINING • Automatic trainer control (ERG): your workout drives the resistance on compatible Bluetooth trainers • Treadmill sessions with grade-adjusted pace targets • A workout library resolved to your own thresholds, or build your own — on the phone or at app.kardiacs.com WEATHER BEFORE YOU GO • Hourly conditions, UV, air quality and severe-weather alerts — and on a planned route, the wind against the road still ahead PROGRESS • Track your fitness over time: Critical Power, W′, and VO₂max • Every ride is written down as it happens, so a flat battery can't lose it • See any past ride on its own map, and share its file — with or without the track • Your history follows your account to a new phone YOUR GEAR, ORGANIZED • Connects to Bluetooth trainers, treadmills, heart-rate monitors and sensors • Send a route or a workout to your bike computer, and import the rides it records • Apple Watch companion app for wrist-based control and heart rate • Saves workouts to Apple Health WHERE YOU RIDE STAYS YOURS • Recorded GPS never leaves your phone — position is stripped from every activity before it syncs anywhere • Speech is recognised on your iPhone; no audio is sent anywhere Kardiacs is free, supported by ads. Every feature is free; there is nothing to buy. Notes: Kardiacs speaks 23 languages, chosen in Preferences or from your system. Weather by Apple Weather. Apple Music features require the Apple Music app (and a subscription for full playback). AI Workout Mixes require Apple Intelligence. Automatic resistance control requires a compatible Bluetooth (FTMS or Wahoo) smart trainer. Turn-by-turn guidance requires location access. Group voice needs iOS 26.4 or later on iPhone 12 or newer; other devices still share positions, chat and cards. You must be 16 or older to use Kardiacs; accounts and structured workouts require you to be 18 or older. ## Key features - Personalized fitness modeling (CP/W′) - Offline GPS navigation and routing - Group rides with encrypted communication - Voice notes and photo notes - AI-powered music matching - Smart trainer and treadmill control - Weather alerts and wind data ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/kardiacs-trainer-and-route-nav/id6792439405/reviews.md ### 5/5 — Love this app. *2026-08-23* This app is super well thought out and covers bases I didn’t even think of. I love being able to get directions offline. I also love that it’s a free app for so much. ## Frequently asked questions about Kardiacs ### Does Kardiacs have ads? Yes, Kardiacs contains advertisements. As a free application, it is supported by ads to provide its features to users. ### What devices does Kardiacs support? Kardiacs is available on Apple Watch, iPhone, and iPad, offering a versatile experience across multiple Apple devices. ### How does Kardiacs personalize workouts? Kardiacs personalizes workouts by modeling your fitness with Critical Power (CP/W′) and adapting power targets, pace targets, and heart-rate zones based on your workout history, Apple Health data, or a quick profile setup. ### Can I use Kardiacs offline? Yes, Kardiacs supports offline navigation. You can download maps and then plan, reroute, and navigate without any signal. ### What is the age rating for Kardiacs? Kardiacs has an age rating of 17+, indicating it is intended for mature users. ### How often is Kardiacs updated? The latest version of Kardiacs is 26.9.1, and it was last updated on September 6, 2026. This suggests frequent updates to improve functionality and add features. ### Can I connect my gear to Kardiacs? Yes, Kardiacs connects to Bluetooth trainers, treadmills, heart-rate monitors, and sensors. You can also send routes or workouts to your bike computer and import rides it records. ### What are the group ride features in Kardiacs? Kardiacs allows you to form groups in person using a QR code, even without a signal. It displays all riders on one map with their training numbers, offers hands-free, end-to-end encrypted communication, and includes group chat with photo sharing. ## Version history (last 5 releases) ### 26.9.2 — 2026-09-10 • Offline maps for anywhere on Earth: search for a place — Kyoto, Nairobi, Bogotá — and take its map with you, instead of only the ground that happened to be on the list • Download as much of the map as you like — the monthly and four-at-once limits are gone; every area shows its size before it starts, and a swipe gives the space back • Chat & Notes, in Settings: every notepad and every group conversation from every ride in one list, to read, export or delete — and notes are per ride now, so a ride opens on a blank pad instead of on March's gate code • Your ride is written down as it happens. A flat battery, a crash, or iOS reclaiming the app in your pocket used to throw away everything since you pressed start; now the ride is waiting when you come back • Fitness History draws the shape of the ride: every activity has its own map, read from the file on your phone • Send a ride to a coach or a club as a FIT file, with or without the track — the switch is off unless you turn it on • Sixteen more languages: Simplified and Traditional Chinese, Korean, Russian, Arabic, Hindi, Indonesian, Turkish, Vietnamese, Thai, Polish, Dutch, Ukrainian, Swedish, Irish and Tibetan — twenty-three in all • Any rider in a group can ask for any stop now — a café, a bike shop, anything, not just water and a restroom — and when the leader says yes it goes on everyone's route, not only on theirs • Choose whether a Wi-Fi Aware pairing lasts the ride or is remembered for good, in Preferences → Wi-Fi Aware Pairing • The group has its own Lock Screen card when no ride is using the lock screen, and unmuting from there works • A voice link that has quietly stopped carrying anything is dropped rather than counted as healthy — the group screen no longer says all is well while nobody can hear you • A new bike arrives in the Garage with its gear already on it, and the kit editor takes more than one change before you save • Cycling routes read the sign rather than the class: a 25 mph secondary or a 20 mph tertiary is priced like the calmer road it is • Bug fixes and performance improvements ### 26.9.1 — 2026-09-06 • Group rides: gather in person with a QR code and ride off the grid together — everyone on one map, each rider's training numbers on their own card, and voice to the whole group, hands-free or push-to-talk, all end-to-end encrypted, with no signal, no account and no server in the middle • Group chat, with photos from the camera, over the same phone-to-phone links — it reaches riders the voice can't, and every conversation saves to your phone after the ride, never to a server • Optional Group chat translation when you don't speak the language of others in the group • Say it and it's in the chat: what you say while unmuted is written down by your own phone and sent as a message, and messages are read aloud to riders who didn't hear you — so nobody looks down • A notepad for riding alone: unmute and talk and your words become notes, snap a photo and that's a note too, then export the lot from the share sheet — it never leaves your phone until you send it • Turn-by-turn cues are spoken now, and say when to get off and walk; Preferences → Text to Voice chooses what the phone reads to you • The leader's route reaches every phone in the group, their start and stop are everyone's, and any rider can ask for a stop — or call for help • Group voice between iPhones needs iOS 26.4 or later on iPhone 12 and up; live positions, chat and capability cards work on anything Kardiacs runs on • Kardiacs now speaks German, Spanish, French, Italian, Japanese and Brazilian Portuguese — choose one in Preferences → Language, or follow your system • Send a route or a workout to your bike computer as a FIT course or workout, from My Routes or a workout's page • Import a ride your bike computer recorded, from the share sheet or from Files • Workouts you write in the browser at app.kardiacs.com arrive on the phone • Your history belongs to your account, not to the phone in your hand: sign in on a new one and the rides — and the fitness curve — are already there • A bike route that crosses ground you have to walk now says so: a cue ten seconds out, on the screen and on the wrist, with the walk drawn on the map • AI Workout Mixes beat-match for real — a bug had every song playing at its own tempo while the app said otherwise • Album art for streamed songs, an Up Next that tells the truth, and music on the picker's rail • Explore loops ride each piece of ground once, and may turn back at a junction when that makes the better loop • A commute plans itself out of the stops you drag into order • Route estimates ride your own tires and gears, into the day's wind • The watch saves the ride it actually rode • Bug fixes and performance improvements ### 1.2 — 2026-08-28 v1.2 • Places on the map: long-press a café, park, bike shop or any named place to make it a stop — your route re-plans through it, or starts from where you stand • One-tap water and restroom stops beside Play and Stop, routed through the nearest one near you • Overhaul of music page UX and music play bug fixes • Name chips over the places a ride cares about, with a callout that knows whether you have a route yet • Explore now starts from a pin you drop and a workout you pick, instead of searching the moment it opens • Pick a route and the map fetches the ground along it before you leave Wi-Fi • Turn-by-turn cues you can feel: the phone buzzes at a junction • Route times on the Explore screen are your own, over the actual hills • Bug fixes, performance improvements, and patched memory leak v1.1 • Reworked outdoor start: pick your sport on a live map that flies to where you are, and stays with you into the session • The session map now turns the way you're travelling, over terrain drawn from our own elevation data • Weather over the map everywhere it appears, not just mid-session • Explore loops and commutes reshape as you ride to hold the distance you chose • Build a commute out of stops and saved routes • "Turn around" guidance when you have to reverse, with a stronger buzz on the wrist for turn-now and turn-around cues • Zone bars for treadmill and outdoor runs, with targets that ramp between intervals instead of jumping • Your watch wakes and mirrors when a session starts on the phone • Truer walking paces, and an honest message while the map is still loading • Bug fixes and performance improvements ### 1.1 — 2026-08-20 New and easier to use UI. Auto-launch watch to mirror iOS device's route and workout. Provides offline turn-by-turn navigation on your watch. Better and faster offline routing. New Satellite image layer (enabled by default when on dirt or gravel. ### 1.0 — 2026-08-14 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-21.*