No plateaus. Only results.
Zolt is the adaptive weight coach that learns from your body. Not static formulas—real metabolism data that adjusts as you progress.
Your metabolism. Understood.
Stop guessing with generic calculators. Zolt's adaptive algorithm learns from your real results to keep you progressing—no matter what.
Why static TDEE calculators fail—and how Zolt succeeds
Learns From You
Unlike static formulas, Zolt analyzes your actual weight changes to calculate your true metabolic rate.
Breaks Plateaus
When progress stalls, Zolt automatically adjusts your targets based on metabolic adaptation patterns.
Holistic View
Your sleep, recovery, and activity data inform smarter calorie recommendations for sustainable results.
Track progress that actually matters
See through daily fluctuations. Zolt shows your true weight trend so you stay motivated.
Goal-Oriented Tracking
Set bulk or cut goals and track your journey with historical progress visualization.
Trend Weight Analysis
See your true progress beyond water weight and daily fluctuations with smart smoothing.
Nutrition made effortless
Log food your way—barcode, AI chat, or custom recipes. Then dive deep into your nutrients.
Smart Food Logging
Barcode scanning, AI-powered chat, and custom recipes make tracking actually enjoyable.
Complete Nutrient View
Go beyond macros with comprehensive micronutrient tracking toward your RDA goals.
Measurements
Track body measurements over time.
Trend Weight
True weight beyond fluctuations.
Flex Planning
Adjust targets by activity.
Nutrients
Full RDA breakdown.
Custom Goals
Personalized targets.
Ready to break through your plateau?
Join thousands who've discovered what their body actually needs.
Download FreeSleep that powers your goals
Your sleep quality directly impacts your metabolism and weight loss. Zolt helps you understand and optimize this critical factor.
Daily Sleep Score
A single number that captures your sleep quality, backed by science. Understand at a glance how well you slept.
Sleep Stage Analysis
See your deep sleep, REM, and light sleep patterns with clear ratings and explanations of what's optimal.
Consistency Tracking
Discover how your sleep schedule affects your metabolism with visual trends and actionable insights.
Heart Rate
Track HR fluctuations throughout sleep.
Awakenings
See when sleep was interrupted.
Continuity
Measure uninterrupted sleep quality.
Insights
Personalized sleep recommendations.
Sleep data powers your adaptive TDEE
Poor sleep affects metabolism. Zolt factors in your sleep quality when calculating calorie recommendations, so you get targets that work with your body, not against it.
Recovery is where progress happens
Recovery like LeBron James. Scientifically-backed recovery metrics that reveal your body's true readiness. Understand when to push and when to rest through comprehensive biomarker analysis.
Recovery Score
A daily assessment combining sleep quality, resting heart rate, heart rate variability, and blood oxygen levels to gauge your readiness for optimal performance.
Biomarker Insights
Deep analysis of critical recovery indicators like HRV and Resting Heart Rate (RHR) with personalized improvement recommendations tailored to your unique physiology.
Sleep Analysis
Detailed sleep stage tracking, sleep efficiency scores, and recovery-focused sleep recommendations that optimize your body's natural restoration processes.
Stress Level Monitoring
Track physiological stress through HRV and autonomic nervous system balance to prevent overtraining.
Performance Readiness
Get clear recommendations on training intensity based on your current recovery status.
Habit Correlation
See how your daily habits and routines influence recovery metrics with journal integration.
Trend Analysis
Identify long-term patterns in your recovery metrics to optimize your training and lifestyle.
Why It Matters
Train smarter, not just harder. Zolt turns complex health data into actionable insights that help you maximize performance by properly balancing exertion and recovery for sustainable progress.
Recovery Vitals Breakdown
Visualize how each vital metric contributes to your overall recovery status with detailed breakdowns and trends over time.
Lifestyle Correlation Analysis
Discover how your daily habits, nutrition, and training affect your recovery metrics with AI-powered pattern recognition.
Train smarter, not just harder
Track, understand, and optimize your training with professional-grade metrics that evolve with you over time.
Activity Score
Know exactly where you stand each day with personalized ratings from 'Rest Day' to 'Pushing It' based on your unique activity baseline and recovery status.
Intelligent Analysis
Zolt learns your activity patterns and provides contextual insights about your performance relative to your personal history and fitness goals.
Daily Guidance
Receive personalized recommendations that balance your training objectives with your current recovery status, ensuring optimal progress without overtraining.
Custom Heart Rate Zones
Personalize your training zones based on your max heart rate, lactate threshold, or let Zolt calculate them from your performance data.
Training Load Trends
Track how your training volume and intensity evolve over time with clear visualizations of your fitness journey.
Fitness Progression
See how your cardiovascular fitness improves with longitudinal analysis of your performance metrics.
Smart Recovery Days
Get strategic recommendations for when to push and when to rest based on your training load and recovery status.
Advanced Training Metrics
Professional-grade insights that guide your training decisions and help you reach your fitness goals.
Cardio Load Analysis
Balance your training with insights into Training Stress Balance (TSB), Acute Training Load (ATL), and Chronic Training Load (CTL) through intuitive visuals and actionable recommendations.
AHA Goal Tracking
Stay on track with American Heart Association recommended activity levels and see your progress toward weekly cardiovascular health targets.
Why It Matters
No more wondering if you're training effectively. Zolt gives you professional-grade training metrics in an easy-to-understand format, helping you optimize your performance while avoiding burnout and injury.
Detailed Workout Analysis
See your progress over time with comprehensive exercise tracking and performance analytics.
Workout Intelligence
Transform every session with detailed heart rate zone breakdowns, training load analysis, and TRIMP scores that quantify your effort and progress over time.
Exercise History
Track your long-term fitness journey with comprehensive graphs showing your progression across different exercises and workout types.
Don't just track. Achieve.
Fully-featured journaling system with streaks. Set goals to maintain good habits over time. Detailed pattern analysis for your crucial health metrics.
Journal & Tag System
Track daily feelings, behaviors, and experiences with custom tags that reveal patterns affecting your sleep, recovery, and performance. Identify what works best for your unique body and lifestyle.
Pattern Analysis Engine
Uncover hidden connections between your behaviors and results with AI-powered insights that get smarter the more you use the app. Transform data into actionable wisdom.
Custom Journal Tags
Create personalized tags to track exactly what matters to you—from mood and energy to specific foods and activities—making it easy to identify patterns and connections in your wellness journey.
Custom Journal Tags
Create personalized tags for tracking exactly what matters to you—from mood and energy to specific foods and activities.
Streak Tracking
Build consistency with visual streak counters that help you maintain your momentum and achieve lasting behavior change.
Metric Correlations
See how your logged habits directly impact your health metrics with clear visual connections between cause and effect.
Smart Suggestions
Receive intelligent recommendations based on patterns of success in your own data, not generic one-size-fits-all advice.
Why It Matters
Real transformation happens when you understand not just what you're doing, but why it works for you. Zolt turns your personal data into a roadmap for success, helping you build sustainable habits that fit your unique life.
Habit Formation Dashboard
Set and track goals like 10,000 steps with clear contribution graphs that visualize your consistency over time. Build streaks that keep you motivated and make healthy behaviors automatic.
Visual Progress Tracking
Monitor your habit completion rates and long-term averages with intuitive heatmaps that show patterns in your behavior. Identify your strongest and weakest days for targeted improvement.
Milestone Celebrations
Stay motivated with meaningful celebrations when you reach streak milestones, reinforcing the positive behaviors that lead to lasting transformation.
Everything you need to succeed
Zolt's core philosophy: make health data easy to understand so you can focus on results.
Habit Tracking
Beyond wearable metrics—track any habit over time, health-related or not.
Smart Check-ins
Daily and weekly coaching that helps you understand your progress.
Easy Food Logging
Barcode scanning, AI chat, custom foods and recipes—logging made simple.
Adaptive Coaching
Calorie targets that adjust to your metabolism and activity in real-time.
Fully Customizable
Make Zolt yours—customize your homescreen and focus on what matters.
Beautiful Charts
Clear visualizations that make your health data easy to understand.