RunTriX
Markus Malz Health & Fitness iPhoneiPadiPod touch
RunTriX is a free Health & Fitness app for iPhone and iPad by Markus Malz. Requires iOS 15.1. Updated August 11, 2026.
- Price
- Free
- on the App Store
- Size
- 74 MB
- Age 4+
- Updated
- Aug 11
- 2026 · v1.3.9
Screenshots
About RunTriX
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
What’s new
Version 1.3.9 · Updated August 11, 2026
What's New: -Account & Cloud Sync (Optional): Sign in with Apple or via email code. Activities and metrics now sync seamlessly between iPhone and iPad—creating an account is entirely voluntary, and the app continues to work as before without signing in. - Tire Pressure Calculator (Pro): Find the optimal pressure for speed, grip, and comfort—calculated separately for front and rear wheels based on system weight, weight distribution, and surface type (road, gravel firm/loose) for road and time trial bikes. - Race Power Calculator (Pro): Convert watts to target time (and vice versa) using a physics engine built for all IRONMAN bike courses. - Swim Jet Calculator (Pro): Calculate distance and pace for swim training against counter-current systems. - All calculators remain available as usual in both German/English and metric/imperial units. Improvements & Bug Fixes: - Significantly More Stable: Crashes are now gracefully handled and displayed on an error screen instead of force-closing the app. Additional crash reporting helps identify and resolve issues faster. - Smoother Sliders: Sliders in the calculators can once again be dragged smoothly.
App privacy
The developer, Markus Malz, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to RunTriX
Looking for apps like RunTriX? Here are 6 similar apps on the App Store. The highest rated is RunningCalc (5.0/5), and 4 of the 6 are free to download.
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EnduroCalc
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Sthenos
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Trailia: Trail Running Coach
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RecoverFit: HRV & Recovery
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RunningCalc
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Vitadel Run: Running Coach
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| RunTriX | – | Free | August 11, 2026 | |
| EnduroCalc | – | 0.99 USD | Sep 3, 2026 | Compare |
| Sthenos | – | 3.99 USD | Sep 9, 2026 | Compare |
| Trailia: Trail Running Coach | – | Free | Oct 11, 2026 | Compare |
| RecoverFit: HRV & Recovery | 1.0 / 5 (1) | Free | May 11, 2026 | Compare |
| RunningCalc | 5.0 / 5 (1) | Free | May 22, 2025 | Compare |
| Vitadel Run: Running Coach | 5.0 / 5 (14) | Free | Aug 25, 2026 | Compare |
Compare RunTriX with the top alternatives: ratings, updates, ASO score and keyword gaps →