Comparison

Keystones of Development vs MedStudy

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Promote developmental keystones
  • Support parent-child relationships
  • Quizzes after each module
  • Downloadable parent handouts
  • Progress tracking across modules
  • Research-based curriculum
Features
Read full description

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

About

MedStudy

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
Read full description

Access QBank+, Flashcards, Video Board Review and Audio Pearls on your mobile devices. Features include: Thousands of practice Q&As and review flashcards Stream hours of laser-focused board review videos with variable playback speed Bookmark essential lectures and take notes using text or voice-to-text In-depth explanations of all Qbank+ answer options Detailed medical images and illustrations Set up unlimited Qbank+ question and flashcard review decks Generate unlimited Qbank+ test decks and sharpen your exam skills Customize question and flashcard decks to focus on specific topics or question sets Access question and flashcard decks seamlessly across web or mobile for anytime, anywhere study Highlight key points in Q&A using four color options for more focused practice and review—available in study and test decks! Detailed Qbank+ and flashcard performance tracking Visualize your progress across video and audio lectures Video and audio continue streaming while you multitask in other apps (now with picture in picture) Download video and audio topics for offline study From medical school to board prep to recertification to maintaining competency, we help you study strong—wherever you are on your medical journey. MEDSTUDY FOR INTERNAL MEDICINE For over 30 years, MedStudy has been trusted by Internal Medicine residents preparing for the ABIM Certification exam in ACGME-accredited allopathic and osteopathic programs, as well as by practicing physicians studying for the ABIM Maintenance of Certification Exam, LKA, and hospitalists taking the Focused Practice in Hospitalist Medicine exam. MEDSTUDY FOR PEDIATRICS MedStudy is the gold standard resource for Pediatricians studying for the ABP Certification exam in ACGME-accredited allopathic and osteopathic programs, as well as by practicing physicians studying for the ABP Maintenance of Certification Exam or MOCA-Peds. MEDSTUDY FOR MED SCHOOL Truly learn the foundations of medicine with everything you need to excel in medical school, the USMLE exams, and beyond.

Screenshots

Keystones of Development4 screens
MedStudy4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard1 real difference · 9 level
Keystones of Development versus MedStudy: the parameters behind the verdict, then further details
ParameterKeystones of DevelopmentMedStudy
PriceFreeFree
Rating5.0 (2 ratings) — better4.8 (265 ratings)
Positive reviews—22.2% of reviews
Number of ratings2265 — better
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better17.6
Further details — not scored
Size63 MB22 MB
Age rating17+17+
DeveloperIcahn School of Medicine at Mount SinaiMedStudy

In-app purchases

None

Keystones of Development

No in-app purchases

None

MedStudy

No in-app purchases

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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