RunTriX vs Sthenos

RunTriX is the ultimate smart toolbox for runners and triathletes – for training, race planning, and performance analysis. Scientific calculators and unique analyses that no other app offers. Developed by an active runner and triathlete for runners and triathletes who like to think ahead – and do the math. Perfect for training, race planning, and everything in between. BASIC (Free – forever) Integration & Sync: - Apple Health Integration - Profile Function - German & English selectable - Metric & Imperial Units Basic Calculators: - Running Pace Calculator - Cycling Pace Calculator - Triathlon Calculator - Race Calculator PRO (Annual Subscription – €9.99 per year) or PRO (Lifetime Access – €19.99 one-time payment) All Basic Features plus: Pro Calculators: RUNNING - VDOT Training Calculator - Marathon Pacing - AI Race Calculator for Running - Marathon Tactics - VO2max Calculator for Running - Age Grade Calculator - Age Group Performance Decline - Anaerobic Threshold - Split Calculator - Speed ​​Converter - Temperature-Pace Correction - Time Gain Calculator - Training Zones - Training Nutrition - TSS Calculator - Energy Gel Calculator - Sweat Loss Rate CYCLING - Power Profile Analysis - VO2max Calculator (Bike) - Breakaway Calculator (Bike) - Temperature-Watt Correction - Anaerobic Threshold - Training Zones - TSS Calculator SWIMMING - CSS Calculator - FINA Points Calculator - Training Zones TRIATHLON - Triathlon Age Calculator - Duathlon Calculator - Triathlon Nutrition Calculator - Triathlon Training Calculator - FINA Points Calculator - TSS Calculator GENERAL / FITNESS / HEALTH 1. 1RM Calculator 2. BMI Calculator 3. Calorie Needs Calculator 4. Ideal Weight Calculator 5. Vitamin D Calculator 6. Hydration Needs Calculator 7. Caffeine Calculator 8. Sleep Calculator 9. Jump Rope Calories 10. Burpee Calories Calculator 11. Wilks Calculator 12. Fitness Race Calculator Note: Some calculators appear in multiple categories (e.g., "Training Zones" for Running/Cycling/Swimming) but are only included once in the Pro subscription STRATISTICS - Performance Management HYBRID BODY BATTERY Which combines Training Load with HealthKit: - 4 data sources: Training (40%), HRV (35%), Sleep (20%), Resting Heart Rate (5%) - Garmin-level accuracy without a Garmin watch POLARIZATION ANALYSIS (unique worldwide) - Shows your true Zone 1/2/3 ratio (according to Seiler) FITNESS DASHBOARD TrainingPeaks-style analyses: - CTL, ATL, TSB - Intelligent trend analysis: Detects overtraining and undertraining INJURY RISK MONITORING (unique) Proactive warning BEFORE injury: - Push notifications: Alerts at critical values STRENGTHS/WEAKNESSES RADAR - Multi-sport spider chart - Cross-sport analysis (running, cycling, swimming) - Shows your performance distribution across a Overview ADVANCED ANALYSES - Competition Timeline: Multi-sport with yearly filters - Long Run Tracking: Special analysis for marathon preparation (>90 min) - Brick Run Analysis: Brick runs (bike-to-run transitions) - and much more RECOVERY & HEALTH DASHBOARD Full Apple Health Integration: - HRV Monitoring: 7-day baseline with trend analysis - 90-minute sleep cycles: Calculate optimal wake-up times - SpO2 & Respiration Rate: Complete recovery dashboard AI-POWERED TRAINING MANAGEMENT Never guess whether you're ready again: - Training Readiness: Reduce / Maintain / Push / Peak - Intelligent recommendations: Based on TSB, ramp rate, and injury risk Important Notes: Apple Health: RunTriX reads data from Apple Health (workouts, heart rate, HRV, sleep, Resting heart rate, body temperature, SpO2) to provide you with the best analyses. Permission will be requested upon first launch. Strava: A Strava connection is recommended for full use of STRATISTIK. Your activities are securely synced via the official Strava API. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://runtrix.app/datenschutz Privacy Policy: https://runtrix.app/privacy

Do you know how much energy you actually have left right now? Sthenos turns your Apple Watch into a live energy score — a single number from 0 to 100 that reflects how recharged or depleted your body is, and whether you're charging or draining at this moment. No guesswork. No manual logging. Just honest, science-backed insight from the sensors you already wear. HOW IT WORKS Sthenos isn't a daily snapshot or a one-off rating. It's a running energy level, updated through the day: • You recharge during genuine rest and sleep — when your heart rate settles and your HRV rises relative to your own baseline. • You drain from activity, elevated heart rate, and physiological stress. • Recent training still counts — a hard workout keeps weighing on you for days, so you can tell when you're truly recovered. Everything is judged against YOUR personal baseline, not population averages. Sthenos learns your normal (about two weeks — faster if you've already been wearing your watch) and calibrates the score to your body. WHAT YOU GET • The heart gauge — your score fills a heart that empties as you deplete and refills as you recover. The number sits inside it and inverts where the waterline crosses, and it beats at your own resting heart rate. • Energy flow — a live read on whether you're charging or draining this hour, and why. • Sleep, Recovery, Heart and Freshness — the four things moving your score, each one tappable for a plain-English explanation of what it means today. • Trends — your history drawn as a tide, at a day, a month, three months or six, from the same model as the live score. • Training load — Fitness, Fatigue and Form from the training impulse of every workout, with the raw daily load drawn underneath, plus the acute:chronic ratio and its sweet spot. • Vitals — every reading your watch takes, each on a rail showing your own normal range and where today sits: heart rate, resting HR, HRV, blood oxygen, respiratory rate, VO₂ max, steps, active energy, sleep, wrist temperature, weight. • On-device AI insights — a short, plain-language read on your day, generated on your iPhone with Apple Intelligence. • Apple Watch app and complications — your score, factors, vitals and training load on the wrist, plus the score as a filling heart, a training-load complication, and a configurable single metric. • Home-screen widgets — a score widget, plus two configurable Vitals widgets where you choose every metric shown. • The science, in-app — an About tab explaining how the score is calculated, with links to the research, and saying plainly where the evidence is contested. PRIVATE BY DESIGN Your health data never leaves your device. Sthenos reads from Apple Health and computes everything locally — no account, no sign-up, no tracking, no ads, no servers. Even the AI insights run on-device. WHAT IT READS (read-only, from Apple Health) • For the score: HRV, resting heart rate, heart rate, sleep, workouts • For Vitals: blood oxygen, respiratory rate, VO₂ max, steps, active energy, wrist temperature, body mass • For the optional fitness-age card: date of birth, biological sex, height, body composition, exercise and stand time, walking heart rate, mobility measures, daylight, blood glucose and pressure Nothing is written back to Apple Health. REQUIRES • iPhone with iOS 18 or later • Apple Watch (Series 4 or later) worn regularly, including overnight, for HRV and sleep. The watch app needs watchOS 11. • On-device AI insights require iOS 26 and an Apple-Intelligence-capable iPhone Sthenos is a personal wellness tool. It is not a medical device and does not provide medical advice. Apple Watch HRV is suitable for personal trends and is not clinical-grade. Always consult a healthcare professional for medical concerns.