Norwegian 4x4 Protocol vs Built Different
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Norwegian 4x4 Protocol
This app provides a precise, distraction-free timer for the scientifically studied Norwegian 4x4 HIIT method. Improve cardiovascular performance and endurance with guided interval training cycles. Track your progress and adapt workouts to your fitness level.
- Precision 4min work / 3min rest cycles
- Heart rate zone tracking (90-95% max HR)
- VO2 Max improvement
- HIIT interval timer
- Progress tracking
- Universal cardio training support
- Offline functionality
Read full descriptionHide full description
Norwegian 4x4 HIIT Timer — Interval Training & VO2 Max BOOST VO2 MAX WITH NORWEGIAN 4X4 PROTOCOL WORKOUTS Train smarter with the Norwegian 4x4 protocol, one of the most studied HIIT methods for improving cardiovascular performance and endurance. A precise, distraction-free timer guides every interval so you can focus on the effort. 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 - Customizable Warmup session length - Customizable Cooldown session length 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 and start training with the Norwegian 4x4.
Built Different
This app guides users toward their fitness and physical goals by creating personalized diet and training programs. It aims to help individuals lose weight and adopt healthier eating habits with ongoing support throughout their journey.
- Personalized diet programs
- Customized training plans
- Weight loss support
- Habit change guidance
- Ongoing coaching support
Read full descriptionHide full description
In Built Different Fitness we will help you to achieve your fitness and physical goals. We want to help as many people as possible to lose weight and change their bad eating habits. We will create diet and training programs that will adapt to your specific needs so you can reach your goals and we will be with you the entire process. * App access requires paid coaching plan Terms of use: https://kahunas.io/terms-conditions Privacy policy: https://kahunas.io/privacy
Screenshots
Verdict
The clearest difference is price: Built Different at Free against Norwegian 4x4 Protocol's $5.99. Built Different also leads on rating (5.0 vs 4.3) and iOS requirement (15.0 vs 17.6). Norwegian 4x4 Protocol's advantage is in-app purchases (none vs 1) and ratings volume (55 vs 1). On ads, monetization model and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Built Different is free to download; Norwegian 4x4 Protocol costs $5.99 up front. Built Different sells 1 in-app purchase, starting at $250.00 per month. Norwegian 4x4 Protocol asks for nothing beyond the download.
Built Different holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Norwegian 4x4 Protocol has 55 ratings behind it against 1, so its average is the more settled of the two.
Norwegian 4x4 Protocol ships an update every 3 weeks, Built Different every 2 months. The most recent releases landed on November 8, 2026 and October 28, 2026 respectively.
| Parameter | Norwegian 4x4 Protocol | Built Different |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 4.3 (55 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 23.5% of reviews | — |
| Number of ratings | 55 — better | 1 |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Paid |
| Best chart rank | #110 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 56 MB |
| Age rating | 4+ | 17+ |
| Developer | Nikita Yampolski | Joshua Feliciano |
In-app purchases
Norwegian 4x4 Protocol
No in-app purchases
Built Different
- Monthly Coaching$250.001 Month
Questions
Is Norwegian 4x4 Protocol free?
Is Built Different free?
Which has better reviews, Norwegian 4x4 Protocol or Built Different?
Do Norwegian 4x4 Protocol or Built Different have ads?
Which is updated more often, Norwegian 4x4 Protocol or Built Different?
Other comparisons
