Synka vs ZephyRun

4 runners in 10 get injured while training for a marathon, and some never make the start line. Synka has one goal: get you to the start line, then across the finish line. IT'S NOT THE MILES, IT'S THE SPIKES Most training mistakes are sudden jumps: a long run much longer than anything you did this month, a hard session the day after a hard session, a comeback that starts too fast. Synka builds your plan to race day and smooths those jumps out, week after week. A PLAN THAT FOLLOWS YOU Ten seconds each morning: energy, pain, period. If you are tired, today's session gets easier. After a bad night, the hard session moves to a better day. Short on time? Say how many minutes you have and Synka builds a session that fits. Missed a week? It eases you back in. YOUR CYCLE, TAKEN SERIOUSLY Synka learns which phases of your cycle cost you more and places hard sessions on your best days. On hormonal contraception or without cycle tracking, the plan works exactly the same. EVERYTHING A PREP NEEDS Build, race-specific and taper blocks. Intervals, threshold, tempo, long runs and lighter weeks. One to seven runs a week, a run-walk start for beginners, and guided strength sessions built into the plan. GPS runs with voice-guided pace, your run on the lock screen, sessions sent to your Apple Watch. SEE YOURSELF PROGRESS Your paces are set on your real level, not on a wish. Synka reads your runs from Apple Health and shows the race time you can aim for, your VO2max pace, your freshness, and your pace at the same heart rate: how many seconds you gained in three months. No watch? Everything works by feel. HONEST Every change to your plan comes with its reason. No made-up numbers, no ads, no tracking, no in-app purchase. Delete your account and all your data from the app, immediately. Synka is not a medical device and does not replace medical advice.

ZephyRun is a personalized race-training app. Tell it your race distance, date, and running experience, and it builds a complete training plan with pace targets that adjust automatically as your fitness improves — based on the runs you already sync to Apple Health. No guessing your paces, no manual entry. TRAIN WITH A PLAN BUILT FOR YOU • Plans for 5K, 10K, half marathon, and marathon • Easy, tempo, interval, and long-run paces calculated from your real running • Paces recalibrate as you get fitter • Today screen shows exactly what to run and how fast TRACK YOUR RUNS • Record runs with GPS on iPhone or Apple Watch • Live pace, distance, and heart rate • Runs save to Apple Health alongside your other workouts ZEPHYRUN PRO Every new account starts with a 14-day free trial of Pro. After that, Pro is a one-time purchase — no subscription. • Adaptive replanning: move a workout, change your race date or run days • Race-day pacing with per-mile/km splits • Progress trends and race readiness • Route map, splits, heart rate range, and elevation for every run • Today's workout and target pace on Apple Watch • Strength-workout logging • Spotify now-playing on the Today screen Your plan, Today, run recording, and run history are always free. PRIVATE BY DESIGN Your training data stays on your device and in Apple Health. No account required. ZephyRun does not provide medical advice. Consult a physician before starting a new training program.