Best 4X4 Timer Interval Training Apps

250+ iOS apps curated and reviewed

4.3 avg rating

19 free apps

Updated August 2026

From beginner-friendly picks to power-user tools, our 4x4 timer interval training list covers 250+ iPhone apps updated through August 2026. Compare ratings, prices, and screenshots in one place.

Compare top 4X4 Timer Interval Training Apps (August 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	4x4 Timer Interval Training	Free	2.0★ (1)	No	No	Aug 2026
2	Interval - Simple Timer	Free	4.8★ (5)	No	No	Aug 2026
3	Norwegian 4x4 workout	Free	—	No	Yes	Sep 2026
4	TimerChain - Interval Timer	Free	—	No	No	May 2026
5	Interval Timer by STRNTH	Free	—	Yes	Yes	Sep 2026
6	Interval Timer Calendar	Free	—	Yes	No	Aug 2026
7	OnTrack Interval Timer	Free	—	No	Yes	Jun 2026
8	Looper - Interval Timer	Free	—	No	Yes	May 2026

Top Picks for 4X4 Timer Interval Training

#1

4x4 Timer Interval Training by Kesem Solutions Pty Ltd

Norwegian 4x4 Interval Timer

Editor's Choice

💪 Health & Fitness

2.0(1 ratings)

Free

4x4 Timer Interval Training screenshot 1

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4x4 Timer Interval Training screenshot 3

4x4 Timer Interval Training screenshot 4

4x4 Timer Interval Training screenshot 5

4x4 Timer Interval Training screenshot 6

This app provides a simple, distraction-free interval timer for the Norwegian 4x4 training protocol. It guides users through 4 minutes of intense effort followed by 4 minutes of rest, repeated four times, to improve cardiovascular fitness and VO₂ max. The minimal interface ensures focus on the workout.

#2

Interval - Simple Timer by Alex Beltyukov

Strong Contender

💪 Health & Fitness

4.8(5 ratings)

Free

Interval - Simple Timer screenshot 1

Interval - Simple Timer screenshot 2

Interval - Simple Timer screenshot 3

Interval - Simple Timer screenshot 4

This app helps you structure your workouts with customizable interval timers. Set work and rest periods, and repeat cycles for your training sessions.

#3

Norwegian 4x4 workout by Alice Winthrop

Interval timer + HR zone guide

Worth Considering

💪 Health & Fitness

0.0(0 ratings)

FreeIn-App Purchases

Norwegian 4x4 workout screenshot 1

Norwegian 4x4 workout screenshot 2

Norwegian 4x4 workout screenshot 3

Norwegian 4x4 workout screenshot 4

Norwegian 4x4 workout screenshot 5

Norwegian 4x4 workout screenshot 6

More 4X4 Timer Interval Training apps to explore

TimerChain - Interval Timer

Sequential Timer Chains

Interval Timer by STRNTH

Interval Timer by STRNTH

Interval Timer by STRNTH

Workout & HIIT interval timer

💪 Health & Fitness

Interval Timer Calendar

Interval Timer Calendar

Interval Timer Calendar

track workout with calendar

This app helps you track your workouts with a simple timer and calendar integration. Set your training and break times, and automatically record your sessions. Save custom timers for quick access to your favorite routines.

Muscle training timerAutomatic calendar recordingSave custom timer lists

OnTrack Interval Timer

OnTrack Interval Timer

OnTrack Interval Timer

Interval Timer for Track Run

💪 Health & Fitness

Looper - Interval Timer

Looper - Interval Timer

Looper - Interval Timer

A minimalist timer for focus

📊 Productivity

VO2 Flow: Norwegian 4x4 Timer

VO2 Flow: Norwegian 4x4 Timer

VO2 Flow: Norwegian 4x4 Timer

Norwegian 4x4 Interval Trainer

💪 Health & Fitness

Super Simple Interval Timer

Super Simple Interval Timer

Super Simple Interval Timer

by Robin Borjesson

💪 Health & Fitness

Training Timer tool

Training Timer tool

Training Timer tool

Custom Workout Intervals

HIIT Interval Timer App

HIIT Interval Timer App

HIIT Interval Timer App

by Alison Hardie

Interval Timer Plus

Interval Timer Plus

Interval Timer Plus

Simple interval timer

This versatile timer app offers a simple yet powerful way to manage timed activities. Customize multiple intervals with individual colors and sounds, and save them as presets for quick access. It's designed for ease of use and visibility, even from a distance, and works seamlessly in the background.

Customizable intervalsNamed intervals with voice readoutIndividual colors and sounds

💪 Health & Fitness

free with in-app purchases

IntervalChrono Timer

IntervalChrono Timer

IntervalChrono Timer

by Victor Anaya

💪 Health & Fitness

Norwegian 4x4 Protocol: Boreas

Norwegian 4x4 Protocol: Boreas

Norwegian 4x4 Protocol: Boreas

Interval training for VO2 max

This app guides you through the Norwegian 4x4 interval training protocol to improve your VO2 max and cardiovascular fitness. It offers customizable warm-up and cooldown durations, voice guidance for intervals, and integrates with Apple Watch for heart rate and calorie tracking.

Norwegian 4x4 workoutsVoice guidance for intervalsApple Watch heart rate tracking

Simple Interval Timer

This app provides a simple and fully customizable interval timer for workouts. It offers unlimited workout profiles, background support, and Live Activities for real-time progress tracking on your lock screen. Enjoy a completely free experience with no ads or paywalls.

Unlimited workout profilesCustomizable action/break durationsLive Activities on Lock Screen

💪 Health & Fitness

Roundly - Interval Timer

Roundly - Interval Timer

Roundly - Interval Timer

Custom Interval Timers

Beep It - interval timer

Beep It - interval timer

Beep It - interval timer

Easy to user interval timer

💪 Health & Fitness

Simple Interval Timer: Flexy

Simple Interval Timer: Flexy

Simple Interval Timer: Flexy

Workout Timer - HIIT & Tabata

💪 Health & Fitness

C-L1 Interval Timer

C-L1 Interval Timer

C-L1 Interval Timer

by Legends Boxing

💪 Health & Fitness

FAQ about 4X4 Timer Interval Training

What are the best 4x4 timer interval training apps for iPhone?

4x4 Timer Interval Training tops our 4x4 timer interval training apps ranking as of August 2026, with a 2.0-star average from 1 App Store ratings, and it's free to download.

Are there free 4x4 timer interval training apps for iPhone?

Yes — 19 of the top 4x4 timer interval training apps we rank are free to download, including 4x4 Timer Interval Training and Interval - Simple Timer.

Does 4x4 Timer Interval Training have ads or in-app purchases?

4x4 Timer Interval Training has no ads and has no in-app purchases, according to its App Store listing as of August 2026.

How many 4x4 timer interval training apps are on the App Store?

We track 250+ 4x4 timer interval training apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.

What is the Norwegian 4x4 training protocol?

The Norwegian 4x4 protocol involves 4 minutes of high-intensity exercise followed by 4 minutes of rest, repeated for a total of four rounds. This method is designed to significantly improve cardiovascular fitness and VO₂ max.

How long does a session take with 4x4 Timer Interval Training?

A complete session using the Norwegian 4x4 protocol, as facilitated by this timer, takes approximately 32 minutes. This includes the 4 minutes ON, 4 minutes OFF, repeated 4 times.