Comparison

JDJ Diagnostics vs PathoPlay

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

Head to head
About

JDJ Diagnostics

Features
Read full description

JDJ Diagnostics enables clinicians to gain fast access to patients' latest test results. It features a ward-centric view that displays the most recent patients for a specific hospital or ward, helping the doctor to have the latest results in-hand and in-time at the patient's bedside. Results can be downloaded beforehand for viewing in areas where Wi-Fi or cellular data connections are not available.

About

PathoPlay

Learn disease and drug mechanisms through interactive puzzles. Connect molecular cascades, identify drug targets, and understand how disruptions lead to illness across 10 body systems. Offers daily challenges and offline access.

Highlights
  • Mechanism-based learning
  • Interactive puzzles
  • Disease and drug tracing
  • Daily challenges
  • Offline access
  • 10 body systems covered
Features
Read full description

PathoPlay teaches pathophysiology and pharmacology by mechanism, not memorization. Trace how diseases start, how drugs treat them, and how the same molecular cascades recur across organ systems. Can you connect the chain? Portal hypertension → splanchnic capillary pressure → fluid transudation → ascites. Every link matters. Miss one, and the pathway breaks. Now treat it. Five drugs in your cart. Only one hits the right molecular target. Choose wrong, the cascade continues. Now sabotage it. A healthy cascade. Five insults: pathogens, toxins, autoantibodies, stressors. Only one disrupts the pathway at the right node. Drop it correctly, and watch the disease unfold step by step. FIVE MODES Chain — Drag and connect steps from trigger to clinical outcome. Reverse — Start with a clinical finding and trace backward to the root cause. How attendings think. Versus — Two similar diseases side by side. Fill in the gaps that distinguish them. Treat — Drag the correct drug onto the right molecular target to block the cascade. Pharmacology by mechanism. Sabotage — Drop the right pathogen, toxin, or autoantibody onto the node it disrupts. Watch the cascade fail in real time. PLUS Mechanisms — Study horizontally instead of by body system. 28 immunopathology, toxin, and hemodynamic clusters span every mode. Daily Challenge — One new chain every day. Build your streak in under 3 minutes. 650 PUZZLES ACROSS 10 BODY SYSTEMS Cardiovascular, Respiratory, Renal, GI & Hepatology, Neurology, Endocrine, Infectious Disease, Hematology, Reproductive, Rheumatology — pathophysiology, pharmacology, and mechanism-disruption in every system. Sabotage highlights: H. pylori, HBV cccDNA, C. difficile, doxorubicin cardiotoxicity, anti-PLA2R membranous, falciparum malaria, prion disease, MS, Hashimoto, Graves, TTP, HIT, APS, HPV cervical cancer, drug-induced lupus, statin myopathy. WHO IT'S FOR Medical students preparing for USMLE Step 1 and Step 2 CK. Nursing students mastering mechanisms for NCLEX. PA, NP, and pharmacy students building clinical reasoning foundations. Anyone who wants to understand why diseases happen and how drugs work. WHY IT WORKS Most study tools ask you to recall facts. PathoPlay asks you to think with mechanism as the unit of reasoning. Five different ways to engage the same molecular reality builds understanding that survives exam pressure and translates to clinical practice. Every puzzle ends with a clinical pearl referenced to standard medical textbooks. From the makers of MedDiagnosis (clinical case simulator) and Kinetics (USMLE biochemistry). ACCESS 200 chains free across all 10 body systems One-time purchase unlocks all four premium modes, the Mechanisms browse, and all future content, yours forever No subscriptions, no ads, fully offline Evidence-based content referenced to Robbins & Cotran, Harrison's, Guyton & Hall, Goodman & Gilman's, Pathoma, Nat Rev Dis Primers, NEJM, and Lancet. Support: contact@diagnosticstudios.com Educational use only. Not for clinical decision-making. USMLE® is a trademark of NBME/FSMB. No affiliation or endorsement.

Screenshots

JDJ Diagnostics4 screens
PathoPlay4 screens

Verdict

The call

The clearest difference is in-app purchases: JDJ Diagnostics at none against PathoPlay's 1. JDJ Diagnostics also leads on iOS requirement (10.0 vs 15.1). PathoPlay's advantage is update cadence (every 11 days vs every 47 months). On price, ads and device support 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. PathoPlay sells 1 one-off in-app purchase. JDJ Diagnostics asks for nothing beyond the download.

UpkeepUpdate frequency

JDJ Diagnostics ships an update every 47 months, PathoPlay every 11 days. The most recent releases landed on October 3, 2026 and October 17, 2026 respectively.

Scorecard3 real differences · 6 level
JDJ Diagnostics versus PathoPlay: the parameters behind the verdict, then further details
ParameterJDJ DiagnosticsPathoPlay
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 47 monthsEvery 11 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.1
Further details — not scored
Size146 MB58 MB
Age rating17+17+
DeveloperMukonHelena Kaso

In-app purchases

None

JDJ Diagnostics

No in-app purchases

1 purchases

PathoPlay

One-time1
  • PathoPlay Premium$12.99

Questions

Is JDJ Diagnostics free?
JDJ Diagnostics is free to download, with no in-app purchases.
Is PathoPlay free?
PathoPlay is free to download, with in-app purchases available.
Do JDJ Diagnostics or PathoPlay have ads?
Neither JDJ Diagnostics nor PathoPlay shows ads.
Which is updated more often, JDJ Diagnostics or PathoPlay?
JDJ Diagnostics ships an update every 47 months, and PathoPlay every 11 days. Most recently, JDJ Diagnostics was updated on October 3, 2026 and PathoPlay on October 17, 2026.

Other comparisons