COMQUEST COMLEX vs Keystones of Development
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
COMQUEST COMLEX
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.
- 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
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COMLEX and COMAT assessments designed specifically by osteopathic physicians! Access questions with detailed explanations to assess and exhibit your knowledge of the COMLEX Level 1, COMLEX Level 2-CE, COMLEX Level 3, or any of the core COMATs. Here is what the app has: Exam mode: choose from tutor, timed, and untimed modes Question mode: choose from incorrect, correct, marked, used, or all questions Specialties and Tasks categories: narrow down your exam further by individual specialties and tasks in each shelf exam Review exams: review previous exams to see how you did compared to your peers in score and time (for individual questions and the entire exam). Marked questions: see how you’re doing on marked questions and review the questions to unmark them Notes: you can take notes on individual questions and explanations and refer back to them anytime Guessed score: mark questions as “guessed” to see if your guessed score ChoiceTrax: all of your changes are tracked so that you can see how often you’re changing the right answer to wrong, and vice versa Comments: submit comments to our staff to review and reply back to you *Must have a previous internal account to use app*
Keystones of Development
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.
- Promote developmental keystones
- Support parent-child relationships
- Quizzes after each module
- Downloadable parent handouts
- Progress tracking across modules
- Research-based curriculum
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Looking for ways to promote brain development and strengthen parent-child relationships during routine checkups? The Keystones of Development curriculum is designed to support pediatric and family medicine residents in everyday practice. Download the app to start learning today! How It Works: 1. Get invited by a faculty member at your institution. 2. Explore our curriculum to learn practical ways to promote six developmental keystones—secure attachment, autonomy, self-regulation, problem-solving, perspective-taking, and academic knowledge—during your well-child visits. 3. Test your knowledge with short quizzes after each module. 4. Download parent handouts and supporting materials to support your practice. Why use Keystones of Development (KOD)? ENHANCE YOUR PRACTICE—Learn how to support positive parenting behaviors and early childhood development at every visit 0-5. SUPPORT YOUR TRAINING—KOD helps fill in gaps around how to focus on early relational health and routine parenting issues that come up at visits, like toilet training, discipline, and sleep. BASED IN RESEARCH—KOD focuses on six developmental keystones that are well supported by research, largely dependent on caregiver behaviors, and strongly predictive of later well-being. LEARN ON THE GO—Take the Keystones with you wherever you go. You’ll continue to have access even after you’re done. LEARN AT YOUR OWN PACE—Track your progress on the 13 modules. Your progress will be saved whether you choose to continue on your phone or your computer, watch the curriculum all at once, or take your time. GET TO OTHER TRAININGS—Deepen your knowledge around sleep, toilet training, and discipline to prepare you for conversations with families in the exam room. SUPPORT THE FAMILIES YOU WORK WITH—Download supportive resources, like age-based handouts and videos, for the families you see in your practice. - Download the Keystones of Development App - Log in with the account provided to you by your program faculty - Start learning! Contact us with any questions! Email: Keystones@mssm.edu https://www.mountsinai.org/tou https://www.mountsinai.org/privacy
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | COMQUEST COMLEX | Keystones of Development |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (142 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 41.7% of reviews | — |
| Number of ratings | 142 — better | 2 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 31 MB | 63 MB |
| Age rating | 17+ | 17+ |
| Developer | COMQUEST Osteopathic Specialists, LLC | Icahn School of Medicine at Mount Sinai |
Bugs and requests
COMQUEST COMLEX
Reported bugs
8 issues- 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
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- Server crashes
- App hardly opens, crashes, and doesn't load images
- ExamGuru error 403
Requested features
10 requests- iPad version with landscape support
- Strike through and highlight option
- Ability to enlarge vitals box
- Fix highlighting issues
- Fix issues with typing over explanations
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- Fix pausing/suspending exam bug
- Improve readability of tables and exhibits on mobile
- Improve graphics and interface
- Add CDM case prompts
- Update app to modern standards
Keystones of Development
Not enough reviews yet to summarise bugs or requests.
In-app purchases
COMQUEST COMLEX
No in-app purchases
Keystones of Development
No in-app purchases
Questions
Is COMQUEST COMLEX free?
Is Keystones of Development free?
Which has better reviews, COMQUEST COMLEX or Keystones of Development?
Do COMQUEST COMLEX or Keystones of Development have ads?
Which is updated more often, COMQUEST COMLEX or Keystones of Development?
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