# N4x4 vs Trellis

The clearest difference is rating: Trellis at 5.0 against N4x4's 4.5. N4x4's advantage is update cadence (every 3 days vs monthly) and ratings volume (19 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Trellis holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: N4x4 has 19 ratings behind it against 1, so its average is the more settled of the two.

N4x4 ships an update every 3 days, Trellis monthly. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | N4x4 | Trellis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (19 ratings)](https://appshunter.io/ios/app/n4x4/id6686407796/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/trellis-habit-tracker/id6792365087/reviews)** |
| Number of ratings | **19** | 1 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Monetization | Free | Free |
| Size | 15 MB | 4 MB |
| Requires iOS | **17.5** | 26.0 |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Jan van Rensburg](https://appshunter.io/developer/1688121173) | [Danyil Proskurka](https://appshunter.io/developer/6792365089) |

## What reviewers say

### N4x4

[App page](https://appshunter.io/ios/app/n4x4/id6686407796)

This app guides you through the scientifically-backed Norwegian 4x4 HIIT protocol to efficiently boost your VO2 Max and cardiovascular health. It offers set-and-forget workouts with visual and audio cues, suitable for all fitness levels.

**Highlights:** Norwegian 4x4 HIIT protocol, Set-and-forget workout structure, Visual and audio interval cues, Real-time heart rate zone display, 5-minute warm-up, 4 rounds of 4-minute intervals, 3-minute recovery periods

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Trellis

[App page](https://appshunter.io/ios/app/trellis-habit-tracker/id6792365087)

This app understands that life isn't always perfect, allowing for rest days and flexible schedules without breaking your progress. It offers on-device insights, smart reminders, and Siri integration to help you track habits effectively and privately.

**Highlights:** Flexible streak engine for rest days and skips, On-device habit insights and correlations, Customizable schedules (daily, weekly, N times), Smart reminders with quiet hours, Siri and Shortcuts integration, Home and lock screen widgets, Private by design with iCloud sync

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is N4x4 free?

N4x4 is free to download, with no in-app purchases.

### Is Trellis free?

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

### Which has better reviews, N4x4 or Trellis?

Trellis is rated higher. N4x4 averages 4.5 out of 5 from 19 ratings, while Trellis averages 5.0 from 1 ratings.

### Do N4x4 or Trellis have ads?

Neither N4x4 nor Trellis shows ads.

### Which is updated more often, N4x4 or Trellis?

N4x4 ships an update every 3 days, and Trellis monthly. Most recently, N4x4 was updated on October 21, 2026 and Trellis on October 20, 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.*