# Autogenic Drainage vs Valve PPM

The clearest difference is review sentiment: Valve PPM at 100% against Autogenic Drainage's 56%. Valve PPM also leads on rating (5.0 vs 3.9) and in-app purchases (none vs 2). Autogenic Drainage's advantage is update cadence (fortnightly vs every 2 months) and ratings volume (40 vs 3). On price, ads and device support there is nothing between them.

Both are free to download. Autogenic Drainage sells 2 one-off in-app purchases. Valve PPM asks for nothing beyond the download.

Valve PPM holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Autogenic Drainage has 40 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 56% of Autogenic Drainage's written reviews are positive against 100% of Valve PPM's.

Autogenic Drainage ships an update fortnightly, Valve PPM every 2 months. Both last shipped on September 21, 2026.

## The numbers

| Metric | Autogenic Drainage | Valve PPM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (40 ratings)](https://appshunter.io/ios/app/autogenic-drainage/id955259636/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/valve-ppm/id1604258260/reviews)** |
| Number of ratings | **40** | 3 |
| Positive reviews | 56.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 30 MB | 37 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 12+ |
| Developer | [Polemics Applications LLC](https://appshunter.io/developer/482504032) | [KRUTSCH](https://appshunter.io/developer/1454678018) |

## What reviewers say

### Autogenic Drainage

[App page](https://appshunter.io/ios/app/autogenic-drainage/id955259636)

This app guides users through autogenic drainage, a breathing technique to clear lung mucus. It features a customizable timer with voice commands and allows symptom tracking. Designed as an aid for individuals with lung conditions, it offers both default and personalized breathing sessions.

**Highlights:** Customizable breathing timer, Voice commands for breathing cues, Default and personalized sessions, Breath phase customization, Symptom tracking, Reference section

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dollar Tip | $0.99 | one-time |
| Five Dollar Tip | $4.99 | one-time |


### Valve PPM

[App page](https://appshunter.io/ios/app/valve-ppm/id1604258260)

This tool assists medical professionals in assessing implanted prosthetic cardiac valves. It offers guidance for checking existing valve function and selecting the optimal valve before implantation based on patient and prosthesis parameters.

**Highlights:** Assess implanted valve function, Select optimal valve before implantation, Analyze patient and prosthesis parameters, Identify potential patient-prosthesis mismatch, Determine intrinsic prosthesis dysfunction

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

**In-app purchases:** none


## Frequently asked questions

### Is Autogenic Drainage free?

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

### Is Valve PPM free?

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

### Which has better reviews, Autogenic Drainage or Valve PPM?

Valve PPM is rated higher. Autogenic Drainage averages 3.9 out of 5 from 40 ratings, while Valve PPM averages 5.0 from 3 ratings.

### Do Autogenic Drainage or Valve PPM have ads?

Neither Autogenic Drainage nor Valve PPM shows ads.

### Which is updated more often, Autogenic Drainage or Valve PPM?

Autogenic Drainage ships an update fortnightly, and Valve PPM every 2 months. Most recently, Autogenic Drainage was updated on September 21, 2026 and Valve PPM on September 21, 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.*