Stellar Intervals

Salud y fitness

Gratis · Diseñado para iPad. No verificado para macOS.

Most Norwegian 4x4 timers count the clock. Stellar Intervals counts what matters: the time your heart is truly in the zone — and how fast it recovers afterward. THE PROBLEM WITH CLOCK-BASED 4x4 The Norwegian 4x4 protocol calls for four 4-minute intervals above ~85% of your max heart rate. But it takes time to climb into that zone — often 60 to 90 seconds. A standard timer counts that ramp-up as "work," so you get an uneven, watered-down dose every session. Two workouts that look identical on the clock can be completely different efforts. TRUE TIME IN ZONE Stellar Intervals fixes this with a heart-rate-gated timer. The interval clock starts only when you cross your 85% threshold — and pauses the instant you drop below it. No more junk time. Every session delivers a true 16 minutes of high-intensity stimulus. Repeatable, predictable, honest. A CLEAN SIGNAL: HEART-RATE RECOVERY Here's what true time in zone unlocks. Heart-rate recovery (HRR) — how many beats per minute your heart drops in the first minute after an interval — is one of the most studied markers of cardiovascular fitness. But it's only meaningful if the effort before it was consistent. Because Stellar Intervals standardizes every interval to the same load, your HRR becomes a clean, comparable number you can trust. Track it interval to interval and week to week, and watch your fitness improve in a metric measured from your own training. THE SCIENCE The Norwegian 4x4 protocol is the gold-standard interval method for improving VO2 max — and VO2 max is one of the strongest predictors of long-term health and longevity. Stellar Intervals helps you execute the protocol precisely and follow your progress through HRR, a marker researchers have long tied to heart health and aerobic fitness. FEATURES Heart-rate-gated timer — counts only true time in zone Auto-pause when you fall below 85% HRmax Per-interval heart-rate recovery (HRR) tracking Long-term HRR and time-in-zone trends Works with Apple Watch and Bluetooth chest straps Sport-agnostic: run, bike, row, ski, or elliptical Apple Health integration Clean, distraction-free workout screen HONEST BY DESIGN Stellar Intervals does not estimate or claim to measure your VO2 max — no app can do that accurately from your wrist. What we do measure, we measure for real: your true time in zone and your heart-rate recovery. Two numbers you can trust, both improving as you train. WHO IT'S FOR Runners, cyclists, and rowers chasing VO2 max gains. Longevity-minded people who already track HRV, sleep, and biomarkers. Anyone who wants their 4x4 done with precision instead of guesswork. Requires a heart rate source (Apple Watch, Apple Airpods Pro 3 or Bluetooth HR monitor). Start your first true interval today.

Calificaciones y reseñas

  • Esta app no ha recibido suficientes calificaciones ni reseñas para mostrar un resumen.

El desarrollador (Garage Projects AB) indicó que las prácticas de privacidad de la app pueden incluir el manejo de datos que se describe a continuación. Para obtener más detalles, consulta la política de privacidad del desarrollador .

  • Datos asociados con tu identidad

    Los siguientes datos pueden recopilarse y asociarse con tu identidad:

    • Salud y fitness
    • Información de contacto

  • Datos no asociados con tu identidad

    Los siguientes datos pueden recopilarse, pero no están asociados con tu identidad:

    • Salud y fitness
    • Identificado­res
    • Datos de uso
    • Diagnóstico

Las prácticas de privacidad pueden cambiar; por ejemplo, según tu edad o las funciones que uses. Obtén detalles

Accesibilidad

El desarrollador aún no ha indicado cuáles funciones de accesibilidad admite esta app. Obtén detalles

Ficha técnica

Vendedor
Garage Projects AB
Tamaño
42.7 MB
Categoría
Salud y fitness
Compatibilidad
Requiere iOS 15.1 o posterior.
  • iPhone
    Requiere iOS 15.1 o posterior.
  • iPad
    Requiere iPadOS 15.1 o posterior.
  • iPod touch
    Requiere iOS 15.1 o posterior.
  • Mac
    Requiere macOS 12.0 o posterior y una Mac con el chip M1 de Apple o posterior.
  • Apple Vision
    Requiere visionOS 1.0 o posterior.
Idiomas
Inglés
Edad
13+
  • 13+
  • Obtén detalles
  • Poco frecuente
    Información de tratamientos médicos
    Concursos

    Contiene
    Temas de salud o bienestar
Copyright
© 2026 Garage Projects AB
  • Sitio web del desarrollador
  • Política de privacidad

    • También te podría interesar