Koar vs Zerxus

KOAR is a strength coach that adapts to your body, not just your preferences. It reads your recovery and fatigue, detects stalls before you do, adjusts volume and intensity to how you're actually recovering, and for women, tunes intensity to your cycle phase. This isn't a workout logger. It's a training system. Free to start. Works on iPhone alone, better with Apple Watch and AirPods. Full gym to just bodyweight, KOAR builds around what you have. HANDS-FREE COACHING Put your AirPods in, put your phone down, lift. A warm studio-quality coach (Kira or Wes) narrates every set: exercise intros, rest countdowns, brace cues before heavy lifts, form reminders, a halfway checkpoint. Works offline, no setup. INTELLIGENT PROGRESSION Every set feeds a progression engine built on exercise science. KOAR estimates your 1RM with an Epley-Brzycki ensemble, detects stalls before you notice, and auto-adjusts volume and intensity. It adds weight when you're ready and calls a deload when you need one, using severity-weighted analysis of your last 4 sessions instead of waiting for you to fail twice. ADAPTS TO YOUR BODY A 5-second wellness check-in (energy, sleep, mood) calibrates every workout. KOAR reads HRV and nutrition from Apple Health to adjust volume and recovery, and uses menstrual cycle data to tune intensity by phase. APPLE WATCH COMPANION Live heart rate with zone coloring, rest timers based on heart-rate recovery (not just the clock), and rep detection tuned per exercise. If your Watch drops mid-workout, your iPhone is the source of truth, no data lost. TEMPO COACHING KOAR prescribes lifting tempo (eccentric, pause, concentric, pause) and guides each phase with haptic pulses on your wrist. COACHING INSIGHTS A Coach tab surfaces patterns you'd miss on your own: masked fatigue, volume response profiles, and wellness-performance correlations unique to you. PERIODIZATION THAT RUNS ITSELF Mesocycles with automatic phase progression, volume landmark tracking per muscle group (MEV/MAV/MRV), and goal-aware deloads. Hypertrophy deloads cut volume with lighter weights; strength deloads cut volume but keep full working weight for CNS readiness. BUILT FOR EVERY LEVEL Beginners get guided weight discovery with live cues. Intermediate lifters get periodized mesocycles with automatic deloads. Advanced lifters get RPE/RIR autoregulation and sex-based programming. EARN YOUR PROGRESS XP tied to training quality, not just showing up. 20 rank tiers, 18 badges for real milestones like 12-week streaks and pressing your body weight, and streak flames that evolve from Bronze to Obsidian over a year. AI PROGRAM BUILDER Describe your ideal training in plain English and KOAR builds a complete periodized weekly plan that respects evidence-based volume landmarks. STRAVA SYNC Completed workouts post to your Strava feed automatically as Weight Training activities. WIDGETS & LIVE ACTIVITIES Today's workout, weekly volume by muscle group, and your streak flame on the Home and Lock Screen. Live Activities keep your current set on Dynamic Island. PRIVACY FIRST No account required. Fully functional offline. No ads. Anonymous usage analytics only, opt-out in Settings. Voice coaching runs entirely on your device. Your data stays on device unless you turn on iCloud sync. SUBSCRIPTION KOAR's core is free: workout logging, RPE/RIR autoregulation, the progression engine, periodization, wellness check-ins, Apple Watch, Strava, and widgets. KOAR Pro unlocks the coaching layer: voice coaching, the AI program builder, Coaching Insights, heart-rate-based rest, body tracking, advanced set techniques, and unlimited routines. New users get a 2-week free Pro trial. Subscriptions auto-renew unless cancelled at least 24 hours before the period ends. Manage or cancel anytime in App Store settings. Localized in 13 languages. Voice coaching in English only for now. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Zerxus is an AI strength coach in your pocket — with real trainers in your corner. START FREE — 7 days, no card required. Zerxus builds you a personalized strength program with AI and adapts it as you train. When you want a human eye, real certified trainers review your plan and add their suggestions. It's coaching that thinks like AI and cares like a trainer. WHAT YOU GET • AI-built training programs personalized to your goals, experience, and equipment • Programs that adapt week to week with RPE-based progressive overload • A personal AI coach chat that remembers your full training history • Built-in rest timer, set logging, and last-performance tracking • Optional review of your program by real strength & conditioning coaches • Nutrition tracking to fuel your training HOW IT WORKS 1. Tell Zerxus your goal, history, and the days you can train 2. Your AI coach builds a complete, periodized program 3. Train, log your sets, and watch the plan adapt as you get stronger WHO IT'S FOR Whether you're returning after a break, chasing your first 100kg lift, or training around an injury, Zerxus meets you where you are. Start your 7-day free trial today. From $9/month after — cancel anytime. Train with intent. Terms of Use (EULA): https://zerxus.com/terms Privacy Policy: https://zerxus.com/privacy-policy/