# Vitalstat vs 4x4 Timer Interval Training

The clearest difference is review sentiment: Vitalstat at 79% against 4x4 Timer Interval Training's 0%. Vitalstat also leads on rating (4.0 vs 2.0) and ratings volume (6 vs 1). 4x4 Timer Interval Training's advantage is in-app purchases (none vs 5) and iOS requirement (13.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Vitalstat sells 5 in-app purchases, starting at $5.99 per month. 4x4 Timer Interval Training asks for nothing beyond the download.

Vitalstat holds the better App Store score, 4.0 against 2.0. That said, the two scores are not equally well evidenced: Vitalstat has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 79% of Vitalstat's written reviews are positive against 0% of 4x4 Timer Interval Training's.

## The numbers

| Metric | Vitalstat | 4x4 Timer Interval Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (6 ratings)](https://appshunter.io/ios/app/vitalstat-hrv-and-sleep-tracker/id6753812827/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/4x4-timer-interval-training/id6759710803/reviews) |
| Number of ratings | **6** | 1 |
| Positive reviews | **78.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Monetization | Freemium | **Free** |
| Size | 273 MB | 12 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Nicklas Wehling](https://appshunter.io/developer/1845142809) | [Kesem Solutions Pty Ltd](https://appshunter.io/developer/1751494198) |

## What reviewers say

### Vitalstat

[App page](https://appshunter.io/ios/app/vitalstat-hrv-and-sleep-tracker/id6753812827)

This app analyzes sleep, recovery, and training data from various sources like Apple Health and wearables. It provides insights into HRV, stress, and personalized morning briefings with an AI coach. Users can also log meals, track nutrition, and journal habits to identify patterns.

**Highlights:** Sleep stage analysis, Heart Rate Variability (HRV) tracking, Recovery and training load monitoring, Personalized morning briefings, AI health data insights, Workout review and meal logging, Habit journaling

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $5.99 | per month |
| Yearly | $54.99 | per year |
| Yearly | $54.99 | per year |
| Yearly - Family Plan | $79.99 | per year |
| Vitalstat Lifetime | $149.99 | one-time |


### 4x4 Timer Interval Training

[App page](https://appshunter.io/ios/app/4x4-timer-interval-training/id6759710803)

This app provides a simple, distraction-free interval timer for the Norwegian 4x4 training protocol. It guides users through 4 minutes of intense effort followed by 4 minutes of rest, repeated four times, to improve cardiovascular fitness and VO₂ max. The minimal interface ensures focus on the workout.

**Highlights:** Simple 4x4 interval timer, Clear ON/OFF phase guidance, Optional sound cues, Large, easy-to-read timer, Session progress tracking, Minimal interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Vitalstat free?

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

### Is 4x4 Timer Interval Training free?

4x4 Timer Interval Training is free to download, with no in-app purchases.

### Which has better reviews, Vitalstat or 4x4 Timer Interval Training?

Vitalstat is rated higher. Vitalstat averages 4.0 out of 5 from 6 ratings, while 4x4 Timer Interval Training averages 2.0 from 1 ratings.

### Do Vitalstat or 4x4 Timer Interval Training have ads?

Neither Vitalstat nor 4x4 Timer Interval Training shows ads.

---

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