Version history
Norwegian 4x4 Protocol
53
ASO score
Text
57/100
Reviews
50/100
Graphic
60/100
Other
0/100
App Rating
4.2
Votes
60
App Age
1 year 7m
Last Update
Dec 05, 2025
Compare with Category Top Apps
|
Metrics
|
Current App
|
Category Top Average
|
Difference
|
|---|---|---|---|
|
Rating
|
4.15
|
4.68
|
-11%
|
|
Number of Ratings (Voted)
|
60
|
801.4K
|
-100%
|
|
App Age
|
1y 7m
|
8y 11m
|
-82%
|
|
In-app Purchases Price
|
$0
|
$49
|
|
|
Update Frequency
|
30d
|
26d
|
+16%
|
|
Title Length
|
22
|
26
|
-15%
|
|
Subtitle Length
|
30
|
28
|
+7%
|
|
Description Length
|
2 171
|
3 323
|
-35%
|
|
Number of Screenshots
|
1170
|
1463
|
-20
%
|
|
Size
|
5MB
|
345MB
|
-99
%
|
Category Ranking in United States
7 days
Last 7 days
Last 30 days
Last 90 days
Last 180 days
Last year
| Top | Dec 01, 2025 | Dec 08, 2025 |
|---|---|---|
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No results were found!
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| Top | Dec 01, 2025 | Dec 08, 2025 |
|---|---|---|
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No results were found!
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| Top | Dec 01, 2025 | Dec 08, 2025 |
|---|---|---|
|
No results were found!
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| Top | Dec 01, 2025 | Dec 08, 2025 |
|---|---|---|
|
No results were found!
|
||
Ranking Keywords in United States
| Keywords | App Rank |
|---|
Analyze this and other apps using Asolytics tools
Text ASO
Title
(
Characters:
22
of 30
)
Norwegian 4x4 Protocol
Subtitle
(
Characters:
30
of 30
)
BEST VO2 & HR MAX TRAINING APP
Description
(
Characters:
2171
of 4000
)
Norwegian 4x4 HIIT Timer - Interval Training & VO2 Max App
BOOST VO2 MAX WITH NORWEGIAN 4X4 PROTOCOL WORKOUTS
Transform your fitness with the proven Norwegian 4x4 interval training method - the most effective HIIT workout for maximising cardiovascular performance and endurance gains.
KEY FEATURES:
- Norwegian 4x4 Timer - Precision 4min work / 3min rest cycles
- Heart Rate Training - Track 90-95% max HR zones
- VO2 Max Improvement - Scientifically proven results
- HIIT Interval Timer - Multiple workout protocols
- Progress Tracking - Monitor your fitness transformation
- Universal Training - Running, cycling, rowing, any cardio, you name it
- Offline Ready - No internet required during workouts
- Haptics Feedback and Vibrations
- Countdown before the start
- Customizible Warmup session lenght
WHAT IS NORWEGIAN 4 BY 4 TRAINING?
The Norwegian 4x4 protocol is a revolutionary HIIT method featuring:
- 4 intervals of 4 minutes at 90-95% max heart rate
- 3 minutes active recovery between intervals
- Proven results: Increase VO2 max by up to 10% in 8 weeks
- Elite approved: Used by professional athletes worldwide
WHY CHOOSE NORWEGIAN 4X4 INTERVAL TRAINING?
- PROVEN RESULTS: Sports science research shows significant cardiovascular improvements
- BEGINNER FRIENDLY: Complete guide for Norwegian 4x4 workout beginners
- CUSTOMIZABLE: Adapt the Norwegian 4 x 4 protocol to your fitness level
- COMPREHENSIVE: Includes warm-up, cool-down, and recovery protocols
- VALIDATED: Mention in Tim Ferriss' Blog
PERFECT FOR:
- Athletes seeking performance gains with Norwegian 4x4 workouts
- Fitness enthusiasts wanting efficient HIIT interval training
- Anyone improving cardiovascular health through proven protocols
- Runners, cyclists, rowers using Norwegian 4x4 interval training
HOW OFTEN NORWEGIAN 4X4?
- Our app includes guidance on optimal training frequency and recovery for maximum VO2 max gains.
START YOUR NORWEGIAN 4X4 TRANSFORMATION
Join thousands who have revolutionised their fitness with the Norwegian 4x4 protocol training. Download the ultimate Norwegian 4x4 workout app now!
DOWNLOAD TODAY - TRANSFORM YOUR FITNESS WITH NORWEGIAN 4 BY 4}
Read more
Other
Additional Information
| Rating: | |
| Voted: | 60 |
| App Store Link: | |
| Website: | |
| Email: | - |
| Privacy Policy: | |
| Categories: | Health & Fitness, Sports |
| Size: | 4MB |
| App Age: | 1 year 7 months |
| Release Date: | May 01, 2024 |
| Last Update: | Dec 05, 2025 |
| Version: | 2.1 |
Version history
2.1
Dec 05, 2025
Improvements of the background mode (thanks Chris for a feedback). Same simplicity.
2.0
Nov 09, 2025
Improved background timer. Same simplicity and classical Norwegian 4x4 Protocol spot-agistic timers. Apply for running, HIIT, rowing, jumping, or any other sport of your choice and follow visual and audio cues.