# Sleevi vs Challlengers

The clearest difference is update cadence: Sleevi at daily against Challlengers's every 3 weeks. Sleevi also leads on device support (4 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

Sleevi ships an update daily, Challlengers every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sleevi | Challlengers |
| --- | --- | --- |
| Price | Free | Free |
| 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** | Every 3 weeks |
| Monetization | Paid | — |
| Size | 73 MB | 39 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | **iPhone, iPad, Apple Watch, Vision Pro** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Kevin Reutter](https://appshunter.io/developer/1273424431) | [JUNGWON JUNG](https://appshunter.io/developer/1859645201) |

## 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


### Challlengers

[App page](https://appshunter.io/ios/app/challlengers/id6758675338)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sleevi free?

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

### Is Challlengers free?

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

### Do Sleevi or Challlengers have ads?

Neither Sleevi nor Challlengers shows ads.

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

Sleevi ships an update daily, and Challlengers every 3 weeks. Most recently, Sleevi was updated on October 24, 2026 and Challlengers on October 25, 2026.

---

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