# Sleevi vs UltraVO2Max

The clearest difference is price: Sleevi at Free against UltraVO2Max's $2.99. Sleevi also leads on update cadence (daily vs weekly) and iOS requirement (17.0 vs 26.5). On ads, in-app purchases and device support there is nothing between them.

Sleevi is free to download; UltraVO2Max costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sleevi ships an update daily, UltraVO2Max weekly. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Sleevi | UltraVO2Max |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/sleevi-mobile-sleep-lab/id6446651812/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 57.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Weekly |
| Monetization | Paid | — |
| Size | 73 MB | 12 MB |
| Requires iOS | **17.0** | 26.5 |
| Devices | **iPhone, iPad, Apple Watch, Vision Pro** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Reutter](https://appshunter.io/developer/1273424431) | [Pai Chin Chuan](https://appshunter.io/developer/1896688550) |

## What reviewers say

### Sleevi

[App page](https://appshunter.io/ios/app/sleevi-mobile-sleep-lab/id6446651812)

This app tracks your body's recovery during sleep using data from your Apple Watch. It analyzes heart rate, respiratory rate, and body temperature to provide a recovery score and personalized insights for optimizing your health and wellness.

**Highlights:** Sleep recovery tracking, Heart rate monitoring, Respiratory rate analysis, Body temperature tracking (compatible models), Personalized recovery score, Health insights and recommendations, Apple Health sync

**Features:** Apple Watch app

**In-app purchases:** none


### UltraVO2Max

[App page](https://appshunter.io/ios/app/ultravo2max/id6769794479)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sleevi free?

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

### Is UltraVO2Max free?

UltraVO2Max costs $2.99, with no in-app purchases.

### Do Sleevi or UltraVO2Max have ads?

Neither Sleevi nor UltraVO2Max shows ads.

### Which is updated more often, Sleevi or UltraVO2Max?

Sleevi ships an update daily, and UltraVO2Max weekly. Most recently, Sleevi was updated on October 24, 2026 and UltraVO2Max on October 28, 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.*