DTrain

AI Triathlon Coach

Only for iPhone

$4.99 · Designed for iPhone. Not verified for macOS.

iPhone

DTrain is an AI-powered triathlon training app built for Ironman and 70.3 athletes who want a smart, personalized coach on their iPhone — no subscription, no cloud, no data sharing. PERSONALIZED DAILY WORKOUTS Every session is generated by an on-device AI model that knows your training phase (Base, Build, Peak, Taper), race date, fitness level, and yesterday's Apple Health data. Swim, bike, run, strength, and rest days — all planned and adapted for you. AI COACH CHAT Chat with your coach anytime. Ask about today's workout, request a swap, report fatigue, or get advice on pacing and recovery. The coach reads your HRV, resting heart rate, and sleep data to give you context-aware guidance. RECOVERY & READINESS Your daily readiness score is calculated from HRV, resting heart rate, and sleep — pulled automatically from Apple Watch. See 14-day sparkline trends for each metric and understand exactly why your score is what it is. HR ZONES & KARVONEN METHOD Set your max heart rate from 6 months of real workout data. DTrain computes your personal 5-zone Karvonen model and applies it to every workout — so Zone 2 really means Zone 2 for your heart. ADAPTIVE TRAINING PLAN The plan evolves with you. Miss sessions, report an injury, or ask for a lighter week — the AI adjusts upcoming workouts to keep you on track for race day without overtraining. 14-WEEK CALENDAR See your full training calendar at a glance. Tap any day to view the prescribed workout and compare it against what you actually completed from Apple Health. FULLY OFFLINE & PRIVATE All AI runs on your device. No account required. No data ever leaves your iPhone. Your health data is yours. APPLE HEALTH INTEGRATION Reads workouts, HRV, resting heart rate, sleep, VO2 max, and heart rate from Apple Health and Apple Watch. Automatically syncs completed workouts to keep your plan up to date. BUILT FOR IRONMAN ATHLETES Supports full Ironman (140.6), 70.3, Olympic, and Sprint distances. Training phases shift automatically as race day approaches.

Ratings & Reviews

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• Edit Workout Pack — customize and save your own workout structures (in-app purchase) • Readiness prescription — sRPE-weighted ACWR now drives your daily training load recommendation • Sleep stage trends — 14-day breakdown of deep/REM/core sleep carried into the readiness view • Streak badge on the home dashboard • Training load trends — Acute/Chronic Workload Ratio (ACWR) chart • On-device AI coach improvements — few-shot prompts, honest token-budget handling, context overflow recovery • Fixed: Apple Health sync restored under iOS 18 New Architecture • Fixed: workout detail sheet no longer hangs on a spinner

Version 1.0.19

The developer, Edson Cimionatto, 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.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Edson Cimionatto
    Size
    • 35.2 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 16.0 or later.
    • iPhone
      Requires iOS 16.0 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.
    Languages
    • English
    Age Rating
    9+
    Copyright
    • © 2026 Edson Cimionatto
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.