RunTriX
Lauf- & Triathlon-Rechner
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
The app for running and triathlon-obsessed nerds. Scientific calculators + unique training analysis with PMC, hybrid body battery, polarization analysis and more.
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
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
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.
The developer, Markus Malz, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Markus Malz
- Size
- 77.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- RunTriX Pro $8.99
- RunTriX Pro $17.99
- Copyright
- © Markus Malz
