Norwegian 4x4 workout
Interval Training Timer
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Free
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About
Norwegian 4x4 is a focused interval training timer for the proven Norwegian 4x4 protocol — four 4-minute high-intensity intervals with 3-minute active recovery periods.
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What's New in Norwegian 4x4 workout
1.3.3
July 20, 2026
This update improves how your iPhone and Apple Watch stay in sync during a workout. • Fixed an issue where opening the app on your iPhone after starting a workout on your Apple Watch could interrupt or end the workout — your iPhone now picks up the in-progress workout and stays in sync. • Fixed a case where the app could briefly show a completed workout right after opening. • General reliability improvements for watch-to-phone workouts.
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In-App Purchases
$4.99
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