Kiiro - Run Tracker & Metrics

VO2 Max, HR Zones & Endurance

Only for iPhone

Free · Designed for iPhone

iPhone

Kiiro – Training Load & Zone Tracker for Runners and Athletes. For runners who train with purpose and want to understand their training load, not just record workouts. Kiiro analyzes your VO2 max trends, heart rate zones, endurance metrics, and performance data to help you run smarter, improve safely, and hit your marathon goals faster. Built for zone 2 training, lactate threshold work, and aerobic endurance. Track every metric that matters from cadence to training load with precision. TRAINING LOAD — Know Your Effort See how your running stress builds over time. • Track recent (acute) training load • Monitor long-term fitness trends • View weekly, monthly, or custom period progress • Balance training to avoid overtraining Training load helps answer: Am I running too hard? Not enough? Or just right? ROUTE COMPARISON — Compete With Yourself Automatically compare your runs on the same route or course. • See all your attempts and personal records • Track pace, heart rate, and session scores • Visual charts show improvement or slowdowns • Identify your fastest runs and best efforts INTENSITY DISTRIBUTION — Know Your Zones Every run has a mix of easy, moderate, and hard effort. Kiiro shows you exactly where. • Time spent in aerobic vs. anaerobic zones • Check if your training matches your goals • Track intensity trends over weeks and months PERFORMANCE METRICS — Track What Matters Advanced metrics to understand your running performance: • VO2 max trends • Resting heart rate and HRV • Cadence, vertical oscillation, ground contact time • TRIMP-based session score • Detailed splits, maps, and zone breakdowns GOALS & HISTORY Set distance, duration, or consistency goals. Review your full running history with trends, summaries, and detailed analytics. Made for runners who care about the details. Train smarter. Improve with clarity.

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Thanks for using Kiiro! This version includes performance improvements and bug fixes.

Version 1.1.1

The developer, endurance101 OÜ, 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 Linked to You

    The following data may be collected and linked to your identity:

    • Health & Fitness
    • Location
    • Contact Info
    • User Content
    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Diagnostics

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
    • endurance101 OU
  • Size
    • 61.2 MB
  • Category
    • Health & Fitness
  • Compatibility
    Requires iOS 18.0 or later.
    • iPhone
      Requires iOS 18.0 or later.
    • Mac
      Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.0 or later.
  • Languages
    English and 2 more
    • English, German, Russian
  • Age Rating
    16+
  • Copyright
    • © endurance101 OÜ
  • Privacy Policy

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