Strimma

Powerful fitness timer that actually works in the background. Live HR integration. Verbal cues. Smart streak tracking. Works on any device, anywhere—your screen can lock.

STRIMMA: The Fitness Timer Built for Champions

Stop settling for basic timers. Strimma brings competition, personalization, and precision to every workout—whether you're crushing HYROX, chasing PRs, or building unstoppable streaks.

Train Like a Champion

Seven powerful timer modes let you tackle any workout style: • Simple Timer — Quick 5-minute burns or all-day stopwatches • EMOM (Every Minute On the Minute) — Hit reps on the clock • AMRAP (As Many Rounds As Possible) — Maximum volume in fixed time • Tabata — Customizable work/rest intervals (1–300 seconds each) • For Time — Race against the clock with live progress • Lap Timer — Track splits and rest intervals between efforts • HYROX — The only timer built for the 8-station functional fitness challenge, with preset sessions (Full, Sprint, Fast, Mini, Reverse Sim, Remixed) plus unlimited custom configurations

Live Heart Rate Integration

Connect your Polar H9, H10, or Verity Sense for real-time BPM monitoring and zone tracking during workouts. Watch your heart rate zone change color (blue to red) as intensity climbs. Post-workout, analyze your zone distribution to optimize training and recovery.

Smart Calorie Tracking - no device needed.

Strimma calculates calories with scientific precision using MET-based formulas—not guesses. Factor in your weight, workout duration, and effort level (Easy to Very Tough) for accuracy you can trust. Every calorie counts toward your Core Training Score.

Build unstoppable streaks and unlock CTS (Core Training Score) multipliers: • Consecutive days with 10+ minutes of training = active streak • 100-day streaks unlock a 1.5× CTS multiplier • Rest tokens auto-recover missed days (earned every 30 days) • Visual calendar shows your training history at a glance

Build Your Workouts

Create unlimited custom workouts with a powerful builder: • Define exercises, target reps, distance, time, or calorie goals • Mix and match to build circuits, complexes, and challenge WODs • Save favorites for instant access mid-week • Automatic scoring based on workout type (rounds, time, total reps)

Customization Your Way

Every aspect bends to your preference: • Adjust work/rest intervals on the fly • Customize HYROX station order and run distances • Set effort level (5 tiers) to match workout intensity • Auto-pause/resume on screen lock—timer keeps running in background • Dark mode support across iOS 18.6+

Built for Active Training

Strimma runs reliably in the background—even when your screen's locked. Start a workout, lock your phone, keep training. Your timer continues accurately via RunLoop, never pausing for interruptions. Precision timing, zero excuses.

Apple HealthKit & iOS 26+ Fitness Features

On iOS 26+ devices, workouts automatically sync to Apple Health. Track your training in the Health app alongside your steps, rings, and daily activity.

Ready to level up? Download Strimma today and join athletes building legendary streaks.

PERFECT FOR

Personal Fitness CrossFit athletes HYROX competitors HIIT enthusiasts Strength training Interval training Meditation sessions Home workouts Gym sessions Personal trainers

PREMIUM FEATURES Remove ads and unlock an ad-free experience. Support the development of Strimma and enjoy uninterrupted training sessions.

PRIVACY FIRST Your data stays on your device. We don't track you. We don't sell your information. Workout history is stored locally using industry-standard encryption.

MINIMUM REQUIREMENTS iOS 18.0 or later iPhone and iPad compatible Start your journey today. Download Strimma and experience the difference a great timer makes.