# Keystones of Development vs MedStudy

The clearest difference is ratings volume: MedStudy at 265 against Keystones of Development's 2. On price, rating, update cadence and ads there is nothing between them.

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

Keystones of Development holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: MedStudy has 265 ratings behind it against 2, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Keystones of Development | MedStudy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/keystones-of-development/id1645603064/reviews)** | [4.8 (265 ratings)](https://appshunter.io/ios/app/medstudy/id6464720933/reviews) |
| Number of ratings | 2 | **265** |
| Positive reviews | — | 22.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 63 MB | 22 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 17+ |
| Developer | [Icahn School of Medicine at Mount Sinai](https://appshunter.io/developer/972625667) | [MedStudy](https://appshunter.io/developer/966167819) |

## What reviewers say

### Keystones of Development

[App page](https://appshunter.io/ios/app/keystones-of-development/id1645603064)

This app provides a curriculum designed to help pediatric and family medicine residents promote child development and strengthen parent-child relationships during routine checkups. It focuses on six developmental keystones and offers quizzes, parent handouts, and progress tracking.

**Highlights:** Promote developmental keystones, Support parent-child relationships, Quizzes after each module, Downloadable parent handouts, Progress tracking across modules, Research-based curriculum

**Features:** macOS Compatibility

**In-app purchases:** none


### MedStudy

[App page](https://appshunter.io/ios/app/medstudy/id6464720933)

Access a comprehensive suite of medical study tools, including practice questions, flashcards, video lectures, and audio pearls. Track your progress, bookmark key content, and customize study decks for any stage of your medical education or career.

**Highlights:** Thousands of practice Q&As and flashcards, Board review videos with variable playback speed, Bookmark lectures and take notes, Detailed performance tracking, Offline video and audio downloads, Cross-platform web and mobile access

**In-app purchases:** none


## Frequently asked questions

### Is Keystones of Development free?

Keystones of Development is free to download, with no in-app purchases.

### Is MedStudy free?

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

### Which has better reviews, Keystones of Development or MedStudy?

Keystones of Development is rated higher. Keystones of Development averages 5.0 out of 5 from 2 ratings, while MedStudy averages 4.8 from 265 ratings.

### Do Keystones of Development or MedStudy have ads?

Neither Keystones of Development nor MedStudy shows ads.

### Which is updated more often, Keystones of Development or MedStudy?

Keystones of Development ships an update every 2 months, and MedStudy every 2 months. Most recently, Keystones of Development was updated on November 3, 2026 and MedStudy on November 3, 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.*