# Norwegian 4x4 Protocol vs OSTEO

The clearest difference is price: OSTEO at Free against Norwegian 4x4 Protocol's $5.99. OSTEO also leads on update cadence (every 8 days vs every 3 weeks) and review sentiment (36% vs 25%). Norwegian 4x4 Protocol's advantage is rating (4.3 vs 2.4) and in-app purchases (none vs 3). On ratings volume, ads, monetization model and device support there is nothing between them.

OSTEO is free to download; Norwegian 4x4 Protocol costs $5.99 up front. OSTEO sells 3 one-off in-app purchases. Norwegian 4x4 Protocol asks for nothing beyond the download.

Norwegian 4x4 Protocol holds the better App Store score, 4.3 against 2.4. Both are backed by a comparable volume of ratings — 55 and 48 respectively. Written reviews complicate that: 25% of Norwegian 4x4 Protocol's written reviews are positive against 36% of OSTEO's, so the app with the better star average is not the one people write more warmly about.

Norwegian 4x4 Protocol ships an update every 3 weeks, OSTEO every 8 days. The most recent releases landed on October 30, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Norwegian 4x4 Protocol | OSTEO |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[4.3 (55 ratings)](https://appshunter.io/ios/app/norwegian-4x4-protocol/id6499464775/reviews)** | [2.4 (48 ratings)](https://appshunter.io/ios/app/osteo-gains/id6736353653/reviews) |
| Number of ratings | **55** | 48 |
| Positive reviews | 25.0% of reviews | **36.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Paid | Paid |
| Best chart rank | **#123** | — |
| Size | 5 MB | 59 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nikita Yampolski](https://appshunter.io/developer/1441915166) | [OSTEO-GAINS LTD](https://appshunter.io/developer/1771588859) |

## What reviewers say

### Norwegian 4x4 Protocol

[App page](https://appshunter.io/ios/app/norwegian-4x4-protocol/id6499464775)

**Currently charting:** #123 Top Paid · Health & Fitness (US App Store)

This app guides you through the effective Norwegian 4x4 interval training method to boost cardiovascular performance and endurance. It features a precision timer, heart rate zone tracking, and progress monitoring for scientifically proven results.

**Highlights:** Precision 4min work / 3min rest cycles, Heart rate zone tracking (90-95% max HR), VO2 Max improvement tracking, Multiple HIIT workout protocols, Progress monitoring, Universal cardio training support, Offline functionality

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### OSTEO

[App page](https://appshunter.io/ios/app/osteo-gains/id6736353653)

This program offers a 52-week exercise plan designed to strengthen bones, particularly for pre-menopausal women. It includes pre-conditioning, stretching, and progressive osteogenic exercises performed at home.

**Highlights:** 52-week bone health program, Pre-conditioning exercises, Stretching routines, Progressive osteogenic exercises, Home-based workouts, Impact tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 12-Month Plan | $14.99 | one-time |
| 12-Month Plan | $24.99 | one-time |
| Year Two Plan | $28.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🔬 Research-backed and genuine
- 💪 Great for bone health
- ✨ New updates are great
- 🏃‍♀️ Motivating for exercise

**What reviewers complain about**

- 🐛 Very buggy and glitchy
- ❌ App doesn't work properly
- 💳 Expensive renewal cost
- 🚫 No free trial or sample
- ⚠️ Price not as advertised

**Reported bugs**

- App crashes or won't open
- Login issues (email/account not recognized)
- Purchased app doesn't allow login
- Cannot create a login
- App freezes or doesn't progress

**Requested features**

- Add 'get ready' verbal cues
- Calendar-style progress dashboard
- Verbal instructions for exercises
- Option to skip intro videos
- Countdown feature without volume


## Frequently asked questions

### Is Norwegian 4x4 Protocol free?

Norwegian 4x4 Protocol costs $5.99, with no in-app purchases.

### Is OSTEO free?

OSTEO is free to download, with in-app purchases available.

### Which has better reviews, Norwegian 4x4 Protocol or OSTEO?

Norwegian 4x4 Protocol is rated higher. Norwegian 4x4 Protocol averages 4.3 out of 5 from 55 ratings, while OSTEO averages 2.4 from 48 ratings.

### Do Norwegian 4x4 Protocol or OSTEO have ads?

Neither Norwegian 4x4 Protocol nor OSTEO shows ads.

### Which is updated more often, Norwegian 4x4 Protocol or OSTEO?

Norwegian 4x4 Protocol ships an update every 3 weeks, and OSTEO every 8 days. Most recently, Norwegian 4x4 Protocol was updated on October 30, 2026 and OSTEO on October 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*