# Indigo vs Valve PPM

The clearest difference is rating: Valve PPM at 5.0 against Indigo's 4.5. Valve PPM also leads on review sentiment (100% vs 67%). Indigo's advantage is ratings volume (15 vs 3) and iOS requirement (12.0 vs 15.1). On price, update cadence, ads 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.

Valve PPM holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Indigo has 15 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 67% of Indigo's written reviews are positive against 100% of Valve PPM's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Indigo | Valve PPM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (15 ratings)](https://appshunter.io/ios/app/indigo-medical-reference/id1384600751/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/valve-ppm/id1604258260/reviews)** |
| Number of ratings | **15** | 3 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 23 MB | 37 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [INDIGOMED LLC](https://appshunter.io/developer/1245963707) | [KRUTSCH](https://appshunter.io/developer/1454678018) |

## What reviewers say

### Indigo

[App page](https://appshunter.io/ios/app/indigo-medical-reference/id1384600751)

A comprehensive medical reference for internal medicine, covering conditions from anemia to HIV/AIDS. It offers guidance for managing common ward and ICU cases, plus essential tips for new residents on consults and H&Ps. Designed for educational purposes for medical students and residents.

**Highlights:** Internal medicine management, Anemia and lab abnormalities, Chronic condition management (e.g., AIDS/HIV), Ward and ICU case management, Tips for new residents, Consultation and H&P guidance

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Indigo free?

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

### Is Valve PPM free?

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

### Which has better reviews, Indigo or Valve PPM?

Valve PPM is rated higher. Indigo averages 4.5 out of 5 from 15 ratings, while Valve PPM averages 5.0 from 3 ratings.

### Do Indigo or Valve PPM have ads?

Neither Indigo nor Valve PPM shows ads.

### Which is updated more often, Indigo or Valve PPM?

Indigo ships an update every 2 months, and Valve PPM every 2 months. Most recently, Indigo was updated on October 24, 2026 and Valve PPM on October 8, 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.*