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Fitness & Privacy7 min read

Sprint90: Privacy-First Fitness Tracking for Every Workout

Track Every Workout, Analyze Every Session

Staying motivated in your fitness journey is challenging. Between juggling training sessions, workouts, and recovery days, it's hard to know if you're actually improving. Sprint90 was built to solve this problem — a comprehensive fitness tracker that turns your training data into actionable insights for any workout type.

Built by an athlete who was frustrated with generic fitness apps, Sprint90 focuses on what matters: sprint detection, GPS route mapping, heart rate zones, and performance analytics — all while keeping your data completely private.

The Power of Tracking Your Progress

Sprint90 isn't about competing with others — it's about becoming better than yesterday's version of yourself. Whether you're into running, cycling, soccer, hiking, swimming, or any other activity, the app helps you:

  • Track detailed performance metrics — Sprint count, sprint distance, speed zones, GPS routes, and heart rate data across all workout types
  • Monitor personal records — Automatic detection when you beat your fastest sprint, longest distance, or highest calorie burn for any activity
  • Unlock achievements — Earn badges for milestones like "First 5K Run," "100 Total Workouts," or "Marathon Distance" across all your activities
  • Build workout streaks — Track consecutive days of activity and maintain momentum regardless of sport
  • Visualize performance — Interactive heatmaps, route maps, training load charts, and speed zone analysis for every workout
  • Apple Watch integration — Full standalone Watch app with real-time metrics during any training session

Every workout becomes an opportunity to improve. Did you hit 25 km/h on that sprint? Cover more distance than last run? Maintain a higher average heart rate in Zone 4? Sprint90 captures it all, regardless of your chosen activity.

Privacy-First Performance Tracking

Unlike most fitness apps, Sprint90 takes a radically different approach to your data. All your workout data stays on your device, integrated directly with Apple HealthKit.

This privacy-first architecture means:

  • Your health data never leaves your device — No cloud servers storing your information
  • No account required — No email, no password, no profile to create
  • Instant Apple Health integration — All workouts sync automatically with the Health app
  • Complete control — You own your data, period

Sprint90 reads from HealthKit to display your workout history and analytics, but everything stays local to your iPhone and Apple Watch.

Features Built for Athletes of All Types

Sprint90 isn't limited to one sport — it's built for anyone who wants to track and improve their fitness.

Advanced Performance Metrics

  • Sprint Detection — Automatically detects sprints over 20 km/h with minimum 1-second duration across running, soccer, cycling, and more
  • Speed Zones — Tracks time spent walking, jogging, running, and sprinting for comprehensive intensity analysis
  • GPS Route Mapping — High-accuracy route visualization with interactive maps for outdoor activities like running, cycling, and hiking
  • Heart Rate Zones — Real-time zone tracking and effort level calculation for any cardio workout

Performance Insights

  • Heatmap Visualization — See where you covered the most ground during outdoor training
  • Training Load Charts — Monitor workout intensity over time across all activities
  • Weekly Schedule View — Visualize your training patterns and balance different workout types
  • Workout Timeline — Detailed graphs of speed, heart rate, and distance over time

Motivation & Tracking

  • Personal Records — Automatically tracks your bests across distance, calories, speed, and duration for each activity type
  • Achievements System — Unlock 50+ achievements from "First Workout" to "Century Club" (100 workouts) across all sports
  • Streak Tracking — Build and maintain workout consistency across any activity
  • Multi-Sport Support — Track running, cycling, soccer, hiking, swimming, strength training, and 20+ other workout types
  • Apple Watch Support — Standalone Watch app for real-time tracking during any session

Built by an Athlete, For Athletes

Sprint90 is a passion project born from real athletic frustration. When existing fitness apps couldn't properly track performance metrics across different sports or respect privacy, the solution was simple: build it. No corporate tracking, no data harvesting, no unnecessary complexity — just clean, focused performance tracking for any workout type.

Start Tracking Today

Your fitness journey is uniquely yours. Sprint90 gives you the tools to track it, analyze it, and improve it — without compromising your privacy. Whether you're training for a marathon, cycling centuries, playing competitive sports, or just staying active, comprehensive performance tracking makes all the difference.

Ready to see your performance in detail? Download Sprint90 on the App Store and start tracking any workout.