# Indigo vs MKSAP 19

The clearest difference is rating: Indigo at 4.5 against MKSAP 19's 4.1. On price, review sentiment, ratings volume and update cadence there is nothing between them.

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

Indigo holds the better App Store score, 4.5 against 4.1. Both are backed by a comparable volume of ratings — 15 and 38 respectively. Written reviews complicate that: 67% of Indigo's written reviews are positive against 71% of MKSAP 19's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Indigo | MKSAP 19 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (15 ratings)](https://appshunter.io/ios/app/indigo-medical-reference/id1384600751/reviews)** | [4.1 (38 ratings)](https://appshunter.io/ios/app/mksap-19/id1577787036/reviews) |
| Number of ratings | 15 | **38** |
| Positive reviews | 66.7% of reviews | **70.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 23 MB | 423 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [INDIGOMED LLC](https://appshunter.io/developer/1245963707) | [American College of Physicians](https://appshunter.io/developer/371090673) |

## 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


### MKSAP 19

[App page](https://appshunter.io/ios/app/mksap-19/id1577787036)

This medical education app provides access to current information in internal medicine and subspecialties. It includes exam-like questions and patient-based clinical scenarios to help physicians assess and update their knowledge. Offline access to content is available for subscribers.

**Highlights:** Current internal medicine information, 1,200 exam-like multiple-choice questions, Patient-based clinical scenarios, Offline content access, Syncs with online version, Enhances learning with figures, charts, and tables

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Indigo free?

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

### Is MKSAP 19 free?

MKSAP 19 is free to download, with no in-app purchases.

### Which has better reviews, Indigo or MKSAP 19?

Indigo is rated higher. Indigo averages 4.5 out of 5 from 15 ratings, while MKSAP 19 averages 4.1 from 38 ratings.

### Do Indigo or MKSAP 19 have ads?

Neither Indigo nor MKSAP 19 shows ads.

### Which is updated more often, Indigo or MKSAP 19?

Indigo ships an update every 2 months, and MKSAP 19 every 2 months. Most recently, Indigo was updated on November 2, 2026 and MKSAP 19 on November 4, 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.*