Athalyze vs Cinder

Athalyze is a training log for athletes who wear more than one device. It runs on iPhone (including iPhone Duo), iPad, Apple Watch and Mac. Run with an Apple Watch and a Garmin, or ride with a bike computer while wearing an Oura ring, and Athalyze merges the recordings into one activity. It works with Apple Watch, Garmin, WHOOP, Oura, Strava, and Google Health devices like Pixel Watch and Fitbit. For each metric it picks the most reliable data, and it keeps the originals so you can see where every number came from. Athalyze is free, with an optional Athalyze Pro subscription for Training Load, Readiness, and deeper analysis. Multi-Device Merging • Recordings of the same workout are combined automatically • Set device priority for each metric if you prefer one source • Compare devices on one chart, each in its own color. Tap a swatch to show or hide it • Import FIT files, including Garmin developer fields like core body temperature • See when a recording switches source, such as heart rate moving from Apple Watch to AirPods Pro • Press play on the map to fly along your route while the charts follow • Two Apple Watches, or a watch and a sleep app like Pillow or AutoSleep, each keep their own heart rate, HRV, sleep and vitals Vitals • Last night's HRV, resting heart rate, respiratory rate, SpO2, skin temperature and sleep on one screen • A Sleep Score for every night, based on how long and how well you slept • Readiness (Pro) gives you a score each morning and suggests how hard to train, using your vitals and your recent training • Choose which device each vital comes from, like HRV from your watch and SpO2 from your ring • HRV is shown as RMSSD, the measure Garmin, Oura and WHOOP use, including Recovery HRV from the newest Apple Watch models. You can also view it as SDNN if your devices record it • Each vital is compared with your own normal range, and you get a morning alert when one falls outside it • Steps and blood glucose are charted against your normal range too Training Load (Pro) • Fitness, Fatigue and Form from every workout, whichever device recorded it • Scored from power, pace or heart rate, with thresholds estimated from your own efforts • Form updates through the day and projects forward to show what a rest day would do Records and Analysis • Best efforts from short intervals to ultra distances, and best power from a few seconds to an hour • Filter by sport and time period • Power and pace curves, with time periods compared on one chart • Correlation heatmaps (Pro) show how two metrics relate, like pace and stride length, and how that has changed between two periods • Histograms (Pro) show how your pace, power, stride length or temperature is distributed, and how that shifts over time Apple Watch • See today's steps against your typical day, plus daily, weekly and monthly trends • Check last night's vitals against your normal range • Follow your training load Fitness, Fatigue and Form (Pro) • Browse recent activities, activity trends and your personal records • Check challenge leaderboards • Put Form on your watch face as a number or a gauge (Pro), and follow a challenge from the Smart Stack Gear and Devices • Track mileage on shoes, bikes and other gear, and see which workouts used each one • Gear rules add your shoes or bike to new activities by sport, type, or sensor • See every device you've used and the activities it recorded • Follow battery levels, and get a notification when a battery runs low Challenges • Step challenges with friends and family, whatever device each person wears • Switch devices during the day and your total stays right. Wearing two at once doesn't count steps twice • Get a notification when your place changes Terms of service: https://www.athalyze.com/terms Privacy policy: https://www.athalyze.com/privacy

Cinder is the run coach in your pocket — powered by AI, built for real runners. Whether you're training for your first 5K or chasing a marathon PR — or taking on a 50 or 100-mile ultra — Cinder builds a personalized training plan around your goal, current ability, and weekly schedule. Then it adapts as you go. SMART TRAINING PLANS Generate a fully personalized plan in seconds. Cinder schedules easy runs, long runs, tempo work, intervals, and rest days — all calibrated to your fitness level and goal race. Supports 5K through 100-mile ultra distances. AI COACH CHAT Ask anything. Your AI coach knows your recent workouts, how you slept, your upcoming races, and your training history. Get real answers, not generic advice — and your conversation carries over every time you open the app. GPS RUN TRACKING Track every run with precise GPS. See live pace, distance, and elapsed time on screen. Your full route is saved and viewable after every run — even with the screen off. CINDER SCORE Each morning, log your sleep, energy, and stress. Cinder uses your daily score to adjust your workout intensity and warmup — so you train smart, not just hard. ADAPTATION ENGINE Told Cinder your legs were dead after Tuesday's long run? Wednesday's workout adapts automatically. The plan bends so you don't have to break. RACES NEAR ME Find upcoming races within 25 miles using live data. Register directly from the app. SHOE TRACKER & RECOMMENDATIONS Log your running shoes and track mileage per pair. Get personalized shoe recommendations based on your training profile with direct shop links. PROFILE & PERSONAL BESTS Track your training streak, total miles, time on feet, fastest mile, and longest run — all in one place. MILESTONE BADGES Earn achievements as you build your streak, hit distance milestones, and reach new personal records. Twelve badges with animated celebrations. RACE PREDICTOR Based on your training data, Cinder predicts your finish time for any race distance using the proven Riegel formula. STRAVA INTEGRATION Connect Strava and your completed runs sync automatically — with distance, duration, and route. Cinder is free. No subscription, no paywall, no account required. Your data stays on your device.