# GRAVITY CHALLENGE vs CPAP Analysis

The clearest difference is in-app purchases: GRAVITY CHALLENGE at none against CPAP Analysis's 2. GRAVITY CHALLENGE also leads on iOS requirement (11.0 vs 26.2). CPAP Analysis's advantage is update cadence (weekly vs every 4 weeks) and ratings volume (7 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. CPAP Analysis sells 2 in-app purchases, starting at $5.99 per month. GRAVITY CHALLENGE asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for GRAVITY CHALLENGE against 5.0 for CPAP Analysis. That said, the two scores are not equally well evidenced: CPAP Analysis has 7 ratings behind it against 1, so its average is the more settled of the two.

GRAVITY CHALLENGE ships an update every 4 weeks, CPAP Analysis weekly. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | GRAVITY CHALLENGE | CPAP Analysis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/gravity-challenge/id1658924657/reviews) | [5.0 (7 ratings)](https://appshunter.io/ios/app/cpap-analysis-tracker-and-log/id6759938653/reviews) |
| Number of ratings | 1 | **7** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Weekly** |
| Monetization | **Free** | Freemium |
| Size | 43 MB | 36 MB |
| Requires iOS | **11.0** | 26.2 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 17+ |
| Developer | [POPVISION MEDIA LLC](https://appshunter.io/developer/1590974379) | [Fellbeck Ltd](https://appshunter.io/developer/1833665126) |

## What reviewers say

### GRAVITY CHALLENGE

[App page](https://appshunter.io/ios/app/gravity-challenge/id1658924657)

This app offers exercise routines and fitness tips to help you achieve a healthy lifestyle. It also provides nutritional advice for better meal choices.

**Highlights:** Exercise routines, Fitness tips, Healthy lifestyle guidance, Meal advice, Nutritional tips

**Features:** macOS Compatibility

**In-app purchases:** none


### CPAP Analysis

[App page](https://appshunter.io/ios/app/cpap-analysis-tracker-and-log/id6759938653)

Easily import and analyze your CPAP machine's data directly on your iPhone. Track events, pressure, SpO2, and sleep trends. Integrates with Apple Health and allows secure data sharing.

**Highlights:** SD card data import, Event breakdown by type, Leak rate and pressure tracking, Respiratory metrics, SpO2 and pulse monitoring, Apple Health integration, Secure data sharing

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CPAP Analysis Monthly Subscription | $5.99 | per month |
| CPAP Analysis Yearly Subscription | $29.99 | per year |


## Frequently asked questions

### Is GRAVITY CHALLENGE free?

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

### Is CPAP Analysis free?

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

### Which has better reviews, GRAVITY CHALLENGE or CPAP Analysis?

GRAVITY CHALLENGE and CPAP Analysis are both rated 5.0 out of 5 on the App Store, from 1 and 7 ratings respectively.

### Do GRAVITY CHALLENGE or CPAP Analysis have ads?

Neither GRAVITY CHALLENGE nor CPAP Analysis shows ads.

### Which is updated more often, GRAVITY CHALLENGE or CPAP Analysis?

GRAVITY CHALLENGE ships an update every 4 weeks, and CPAP Analysis weekly. Most recently, GRAVITY CHALLENGE was updated on October 14, 2026 and CPAP Analysis on October 18, 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.*