# NOFFS Endurance vs O2X

The clearest difference is in-app purchases: NOFFS Endurance at none against O2X's 2. NOFFS Endurance also leads on review sentiment (100% vs 66%) and rating (4.7 vs 4.2). O2X's advantage is update cadence (every 3 weeks vs every 16 months) and ratings volume (68 vs 3). On price, ads and device support there is nothing between them.

Both are free to download. O2X sells 2 in-app purchases, starting at $9.99 per month. NOFFS Endurance asks for nothing beyond the download.

NOFFS Endurance holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: O2X has 68 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of NOFFS Endurance's written reviews are positive against 66% of O2X's.

NOFFS Endurance ships an update every 16 months, O2X every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | NOFFS Endurance | O2X |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/noffs-endurance/id815804966/reviews)** | [4.2 (68 ratings)](https://appshunter.io/ios/app/o2x/id1491463207/reviews) |
| Number of ratings | 3 | **68** |
| Positive reviews | **100.0% of reviews** | 65.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 122 MB | 79 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CNIC HQ](https://appshunter.io/developer/1476096815) | [O2X Human Performance LLC](https://appshunter.io/developer/1491463206) |

## What reviewers say

### NOFFS Endurance

[App page](https://appshunter.io/ios/app/noffs-endurance/id815804966)

This app offers a comprehensive fitness and nutrition program developed by the Navy, incorporating sports science for enhanced performance and injury prevention. It includes tailored workouts, fueling strategies, and recovery techniques to help users achieve their weight and performance goals.

**Highlights:** Performance-focused workouts, Injury prevention strategies, Personalized fueling plans, Caloric needs calculation, Meal builder with high-octane foods, Regeneration and recovery techniques, Progressive cardiovascular training

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

**In-app purchases:** none


### O2X

[App page](https://appshunter.io/ios/app/o2x/id1491463207)

This app delivers personalized physical and mental training programs designed to meet your specific needs. Access workouts and guidance from a team of over 150 elite athletes, special operations veterans, and academics.

**Highlights:** Customized training programs, Physical training, Mental training, World-class athlete trainers, Special operations veteran trainers, Academic expertise

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $9.99 | per month |
| Yearly Subscription | $99.99 | per year |


## Frequently asked questions

### Is NOFFS Endurance free?

NOFFS Endurance is free to download, with no in-app purchases.

### Is O2X free?

O2X is free to download, with in-app purchases available.

### Which has better reviews, NOFFS Endurance or O2X?

NOFFS Endurance is rated higher. NOFFS Endurance averages 4.7 out of 5 from 3 ratings, while O2X averages 4.2 from 68 ratings.

### Do NOFFS Endurance or O2X have ads?

Neither NOFFS Endurance nor O2X shows ads.

### Which is updated more often, NOFFS Endurance or O2X?

NOFFS Endurance ships an update every 16 months, and O2X every 3 weeks. Most recently, NOFFS Endurance was updated on October 23, 2026 and O2X on October 24, 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.*