Zōn vs Stackd

Your training deserves one app. ZON unifies your workout tracking, nutrition, AI coaching, and athlete data in one elite platform, built for serious athletes. Used by powerlifters, hybrid athletes, Hyrox competitors, and bodybuilders. WHAT ZON DOES FOR YOU Track Every Workout Log sets, reps, and weight. Auto-calculate your 1RM. Track progressive overload across every lift. Master Your Nutrition Log macros with precision. Connect your diet to your training goals. Stop juggling separate apps. AI Coach, Always On Get real-time insights, personalized workout suggestions, and weekly performance reports — powered by AI. Daily Readiness Score Know when to push and when to recover. ZON tracks your readiness so you never overtrain. Connect With Your Coach Share your stats, receive programs, and communicate directly with your coach inside the app. Compete & Level Up Challenge athletes in real-time duels. Earn XP. Climb the ZonRank leaderboard. WHO ZON IS FOR Powerlifters tracking 1RM progression Hybrid athletes managing run + lift volume Hyrox competitors optimizing race prep Bodybuilders tracking macros + volume Athletes working with a coach SIMPLE. POWERFUL. ELITE. Log your workout in real-time Review AI insights after each session Execute the perfect plan, every week Download ZON and train like an elite athlete.

Training phases change. Work gets busy. Goals shift. Most fitness apps lock you into their programs. Stackd works with whatever plan you built this week — because your AI agent writes it, and Stackd just keeps score. IMPORT AI WORKOUTS IN SECONDS Design your program in any AI agent. Copy the JSON. Paste it into Stackd. Your full workout plan appears instantly — exercises, sets, rep targets, everything. No manual entry. No templates. No friction. TRACK EVERY SESSION Log sets, reps, and weight as you train. Stackd auto-fills your last session's weight so you always have a starting point. Hit your rep targets and the weight recommendation updates automatically — progressive overload built in. SEE YOUR STRENGTH GROW Estimated 1-rep max charts for every exercise. Watch your squat, bench, and deadlift climb week over week. Full session history so you never lose a workout. NUTRITION TRACKING INCLUDED Log meals and hit your macro targets without switching apps. Build daily meal plans, track protein, carbs, and fat. Everything in one place. BUILT FOR LIFTERS WHO PLAN WITH AI Most fitness apps want to sell you their programs. Stackd assumes you already know how to use AI Agents to build a better one. We just give those programs a home. No ads. No upsells inside the app. Cancel anytime.