VO2 Flow: Norwegian 4x4 Timer
CHRISTOPHER DISCOTTO Health & Fitness iPhoneiPadiPod touch
VO2 Flow: Norwegian 4x4 Timer is a free Health & Fitness app for iPhone and iPad by CHRISTOPHER DISCOTTO. Rated 5.0/5 from 1 ratings. Requires iOS 13.0.
- Rating
- 5.0
- 1 ratings
- Price
- Free
- on the App Store
- Size
- 25 MB
- Age 4+
- Updated
- Jun 14
- 2026 · v2.6.1
Screenshots
About VO2 Flow: Norwegian 4x4 Timer
VO2 Flow is built for the Norwegian 4x4 protocol, the research-backed interval method athletes use to raise VO2max. Four 4-minute intervals at 90 to 95% max heart rate, with 3-minute recoveries. Studies show a 10% VO2max increase in 8 weeks. Run Norwegian 4x4 or build your own protocol. Tabata. 10x1. 8x2. Any work and rest combination, any number of rounds. Free in the app: - Norwegian 4x4 protocol built-in and ready to start - Workout history, every completed session logged and grouped by month - One custom interval profile - Apple Music integration, album art and controls during your session - Audio cues and haptic feedback on every phase transition - Keep screen awake during workouts - Landscape and portrait support Pro upgrade, $4.99 one-time: - Remove all ads forever - Unlimited custom interval profiles - Achievement badges, 7 milestones you can share - Every future Pro feature, no subscription This is a timer, not a fitness platform. No social feed. No subscription. No complexity. Launch, pick a profile, start.
What’s new
Version 2.6.1 · Updated June 14, 2026
Your full workout history is now available to everyone, free. Plus minor stability improvements.
App privacy
The developer, CHRISTOPHER DISCOTTO, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Usage Data: Product Interaction
Used for: Analytics, App Functionality
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Purchases: Purchase History
- Identifiers: Device ID
- Usage Data: Advertising Data
- Diagnostics: Crash Data, Performance Data
Used for: Third-Party Advertising, Analytics, App Functionality
Alternatives to VO2 Flow: Norwegian 4x4 Timer
Looking for apps like VO2 Flow: Norwegian 4x4 Timer? Here are 6 similar apps on the App Store. The highest rated is Norwegian 4x4 Heart Rate (5.0/5), and all 6 are free to download.
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Norwegian 4x4 Heart Rate
5.0
-
Norwegian 4x4 workout
5.0
-
Norwegian 4x4 Coach
5.0
-
Ramp4x4: VO2 Max Trainer
5.0
-
Boost VO2 - Norwegian 4x4
4.0
-
Tabata & HIIT Timer - PEAKVO2
5.0
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| VO2 Flow: Norwegian 4x4 Timer | 5.0 / 5 (1 rating) | Free | June 14, 2026 | |
| Norwegian 4x4 Heart Rate | 5.0 / 5 (1) | Free | May 22, 2026 | Compare |
| Norwegian 4x4 workout | 5.0 / 5 (3) | Free | Sep 18, 2026 | Compare |
| Norwegian 4x4 Coach | 5.0 / 5 (1) | Free | Jun 27, 2026 | Compare |
| Ramp4x4: VO2 Max Trainer | 5.0 / 5 (1) | Free | Oct 3, 2026 | Compare |
| Boost VO2 - Norwegian 4x4 | 4.0 / 5 (1) | Free | Sep 3, 2025 | Compare |
| Tabata & HIIT Timer - PEAKVO2 | 5.0 / 5 (4) | Free | Oct 7, 2026 | Compare |