# RunTriX — Lauf- & Triathlon-Rechner

> Lauf- & Triathlon-Rechner (iPhone/iPad app by Markus Malz.)

- Source: https://appshunter.io/ios/app/runtrix/id6754517046 (this page in markdown: same URL + `.md`)
- Developer: [Markus Malz](https://appshunter.io/developer/1848600933)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 74 MB
- Languages: American English
- Released: 2026-02-10
- Data updated: 2026-08-17
- User reviews in markdown: https://appshunter.io/ios/app/runtrix/id6754517046/reviews.md

## What is 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| RunTriX Pro | $8.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| RunTriX Pro | $17.99 | one-time |



## Version history (last 5 releases)

### 1.3.9 — 2026-08-11

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.

### 1.3.8 — 2026-07-08

- DIAAS Calculator
- Polarization Analysis Correction: Only one value is now needed to be taken into account when set to "Auto."
Injury Risk with new Sport-Specific Fatigue Analysis: The injury risk analysis now goes beyond individual sessions (heart rate drift, power variability) and evaluates cumulative load separately by sport. It assesses your current training load (ATL), recovery status (Form/TSB), and whether you are increasing your training too quickly (CTL ramp rate)—all calculated separately for running and cycling, ensuring that high running stress does not falsely influence your cycling risk.
- Notifications: Automatic health alerts (injury risk, Body Battery, TSB) are now reliably delivered as push notifications; the issue where they failed to initialize at app startup has been fixed.
- New: Nix Integration: Import your Nix workout data (.xlsx) directly into the Sweat Rate Calculator to automatically receive a personalized sodium and electrolyte analysis based on your real training data.
- Strava Sync Fixed: We resolved an issue where the connection to Strava could drop over time, causing new activities to stop importing. If your data is out of sync, please reconnect to Strava once in the settings—after that, synchronization will run continuously again.
- Fixed: Correct display of the time period in the PMC.

### 1.0.2 — 2026-03-04

Bugfixing

### 1.0.1 — 2026-02-28

Bugfixing

### 1.0 — 2026-02-10

No release notes.

## Apps similar to RunTriX

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [GymBo Pro](https://appshunter.io/ios/app/gymbo-pro/id6756262310) | — | Free | Health & Fitness |
| [Værftet](https://appshunter.io/ios/app/vrftet/id6450004911) | — | Free | Health & Fitness |
| [Running Genie: AI Run Coach](https://appshunter.io/ios/app/running-genie-ai-run-coach/id6742008915) | 5.0 (2) | Free | Health & Fitness |
| [Smart Caffeine Tracker](https://appshunter.io/ios/app/smart-caffeine-tracker/id6757125036) | 4.0 (2) | Free | Health & Fitness |
| [EnduroCalc](https://appshunter.io/ios/app/endurocalc/id6743703780) | — | $1.99 | Health & Fitness |
| [Marathon Stars: Race Journal](https://appshunter.io/ios/app/marathon-stars-race-journal/id6756442732) | 5.0 (4) | Free | Health & Fitness |

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*