# Knotty USA vs cpap.com

The clearest difference is ads: cpap.com at none against Knotty USA's shown. cpap.com also leads on rating (4.8 vs 4.4) and monetization model (ad-supported vs free with in-app purchases). Knotty USA's advantage is ratings volume (107 vs 34). On price, review sentiment, update cadence and in-app purchases there is nothing between them.

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

cpap.com holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 107 and 34 respectively. Written reviews complicate that: 7% of Knotty USA's written reviews are positive against 0% of cpap.com's, so the app with the better star average is not the one people write more warmly about.

Knotty USA ships an update monthly, cpap.com every 3 weeks. The most recent releases landed on September 20, 2026 and August 13, 2026 respectively.

## The numbers

| Metric | Knotty USA | cpap.com |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (107 ratings)](https://appshunter.io/ios/app/knotty-usa/id1666034479/reviews) | **[4.8 (34 ratings)](https://appshunter.io/ios/app/cpapcom/id6502783487/reviews)** |
| Number of ratings | **107** | 34 |
| Positive reviews | **6.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 98 MB | 78 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Knotty Knickers INC](https://appshunter.io/developer/1666034482) | [CPAP.com](https://appshunter.io/developer/1746779234) |

## What reviewers say

### Knotty USA

[App page](https://appshunter.io/ios/app/knotty-usa/id1666034479)

This app provides exclusive discounts and early access to new product launches. Enjoy easy browsing of the full catalog and receive notifications for special offers. Secure checkout makes shopping quick and convenient.

**Highlights:** Exclusive discounts, Early access to launches, Easy catalog browsing, First-to-know notifications, App-user-only early access, Secure and fast checkout

**Features:** macOS Compatibility

**In-app purchases:** none


### cpap.com

[App page](https://appshunter.io/ios/app/cpapcom/id6502783487)

Shop for CPAP supplies with exclusive discounts and early access to new products. Enjoy easy browsing, secure checkout, and push notifications for special offers.

**Highlights:** Exclusive discounts, Early access to launches, Easy browsing, Push notifications, Secure checkout

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

**In-app purchases:** none


## Frequently asked questions

### Is Knotty USA free?

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

### Is cpap.com free?

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

### Which has better reviews, Knotty USA or cpap.com?

cpap.com is rated higher. Knotty USA averages 4.4 out of 5 from 107 ratings, while cpap.com averages 4.8 from 34 ratings.

### Do Knotty USA or cpap.com have ads?

Knotty USA shows ads; cpap.com does not.

### Which is updated more often, Knotty USA or cpap.com?

Knotty USA ships an update monthly, and cpap.com every 3 weeks. Most recently, Knotty USA was updated on September 20, 2026 and cpap.com on August 13, 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.*