# COMQUEST COMLEX vs Keystones of Development

The clearest difference is rating: Keystones of Development at 5.0 against COMQUEST COMLEX's 4.0. Keystones of Development also leads on monetization model (free vs free with in-app purchases). COMQUEST COMLEX's advantage is ratings volume (142 vs 2) and device support (3 vs 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.

Keystones of Development holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: COMQUEST COMLEX has 142 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. The most recent releases landed on November 2, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | COMQUEST COMLEX | Keystones of Development |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (142 ratings)](https://appshunter.io/ios/app/comquest-comlex-comat/id1115705682/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/keystones-of-development/id1645603064/reviews)** |
| Number of ratings | **142** | 2 |
| Positive reviews | 41.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 31 MB | 63 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [COMQUEST Osteopathic Specialists, LLC](https://appshunter.io/developer/1108288743) | [Icahn School of Medicine at Mount Sinai](https://appshunter.io/developer/972625667) |

## What reviewers say

### COMQUEST COMLEX

[App page](https://appshunter.io/ios/app/comquest-comlex-comat/id1115705682)

Prepare for COMLEX and COMAT exams with practice questions and detailed explanations created by osteopathic physicians. Features include customizable exam modes, question filtering by status or specialty, and performance tracking against peers. Review past exams, add notes, and monitor answer changes to solidify your knowledge.

**Highlights:** Customizable exam modes (tutor, timed, untimed), Question filtering by status and specialty, Performance review against peers, Note-taking on questions and explanations, Answer change tracking (ChoiceTrax), Review of marked and guessed questions

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Great questions and explanations
- 🚀 Fast and reliable app
- 👍 Convenient for studying on the go
- 👍 User-friendly interface (desktop version)
- 👍 Good for COMLEX prep

**What reviewers complain about**

- 📱 Poor iPad support (iPhone port)
- 📱 No landscape view on iPad
- 🐛 Highlighting issues (variable, won't clear)
- 🐛 Typing over explanations
- 🐛 Pausing exam messes up score

**Reported bugs**

- Pausing/suspending exam messes up final score
- Highlighting is variable, won't clear, or adds space
- App lets users click and type over explanations
- Exhibit covers question vignette
- Cuts off half of the question stem

**Requested features**

- iPad version with landscape support
- Strike through and highlight option
- Ability to enlarge vitals box
- Fix highlighting issues
- Fix issues with typing over explanations


### 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


## Frequently asked questions

### Is COMQUEST COMLEX free?

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

### Is Keystones of Development free?

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

### Which has better reviews, COMQUEST COMLEX or Keystones of Development?

Keystones of Development is rated higher. COMQUEST COMLEX averages 4.0 out of 5 from 142 ratings, while Keystones of Development averages 5.0 from 2 ratings.

### Do COMQUEST COMLEX or Keystones of Development have ads?

Neither COMQUEST COMLEX nor Keystones of Development shows ads.

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

COMQUEST COMLEX ships an update every 2 months, and Keystones of Development every 2 months. Most recently, COMQUEST COMLEX was updated on November 2, 2026 and Keystones of Development on October 24, 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.*