Comparison

Davis’s Lab & Diagnostic Tests vs RNotes

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

Head to head
About

Davis’s Lab & Diagnostic Tests

This app provides comprehensive guidance on hundreds of diagnostic tests, including interpretation of results, patient preparation, and post-test care. It's designed for nurses and healthcare professionals to understand and implement critical test procedures effectively.

Highlights
  • Over 400 lab and diagnostic test monographs
  • Subspecialty test coverage
  • Nursing implications and clinical judgment sections
  • Cross-reference links to related tests
  • Patient preparation and specimen collection guides
  • Advanced search and favorites functionality
Features
Read full description

**Featuring Content from the latest Edition** * Easy-To-Understand Guidance for Before, During, and After Every Test * ABOUT DAVIS’S LABORATORY & DIAGNOSTIC TESTS Davis’s Laboratory & Diagnostic Tests contains hundreds of diagnostic test descriptions to help understand and implement critical test procedures. Each entry delivers details on test function, accurately interpreting normal and abnormal results, and preparing your patients. With recommendations on pretest requirements, intratest procedures, and post-test care, this mobile resource is the perfect companion for practicing nurses, nursing students, and other health care professionals. FEATURES • Up-to-date monographs of over 400 laboratory and diagnostic tests • Unique coverage of laboratory and diagnostic tests for subspecialties, such as maternity, therapeutic drug monitoring, nutrition and sensory • New coverage of sensitive issues that nurses encounter in real-life practice such as patient decisions on childhood vaccinations, caring for victims of sexual assault, and how to describe maternal markers to screen for generic defects • Emphasis on Clinical Judgment with “Nursing Implications, Nursing Process, Clinical Judgment” sections added to draw attention to the clinical judgment aspect of care • Cross-reference links to related tests • Common Use sections with everyday language descriptions of what the test is for • Useful appendices including Critical Findings, Procedural Checklists, Patient Prep and Specimen Collection • Interfering Factors listing anything that may interfere with the results of the test • Highlight and make notes within any entry • Advanced Search helps find topics quickly • “Favorites” for bookmarking important entries Authors: Anne M. Van Leeuwen, MA, BS, MT (ASCP); Mickey L. Bladh, RN, MSN Publisher: F.A. Davis Powered by: Unbound Medicine

About

RNotes

This medical reference app provides essential nursing information for students and professionals. It offers quick access to clinical content, NCLEX tips, and safety alerts, with updated guidelines and laboratory values. An in-app purchase unlocks all features and ongoing updates.

Highlights
  • Nursing Alerts for critical safety information
  • HIPAA- and OSHA-compliant notes
  • Quick-access tabs for fast navigation
  • Highlighted critical laboratory values
  • Interventions and patient education
  • ACLS resuscitation procedures
Features
Read full description

"Try before you buy" - Download the FREE App, which includes sample content. In-App purchase required to unlock all content. A Davis’s Notes title! Your one-stop source for class, clinical, and practice! Access the clinically oriented content you need to deliver safe and effective health care in hospital and home settings for all of your patients. Handy mobile app is great for students and educators on the go, while NCLEX® tips, highlighted throughout, make it perfect for those preparing for the licensure exam. KEY FEATURES - ‘Nursing Alerts’ that highlight critical safety information. - HIPAA- and OSHA-compliant write-on/wipe-off pages - Quick-access tabs - Critical level laboratory values highlighted in bold, red type to correlate to potential diseases and disorders described in other sections. - Interventions and patient education information for the most common conditions - Coverage of life span considerations as well as complications and emergencies associated with pregnancy and delivery - Tools for a thorough general assessment of the adult patient - ACLS resuscitation procedures as well as pediatric and neonatal advanced life support information - The basics of 12-lead interpretation tailored to nurses with little or no 12-lead experience - An emphasis on symptom and patient presentation rather than medical diagnosis NEW TO THIS EDITION - Updated & Revised! Thoroughly updated, reviewed, and revised throughout to reflect the art and science of nursing practice today. - New! All laboratory values sourced from Van Leeuwen: Davis's Comprehensive Manual of Laboratory and Diagnostic Tests With Nursing Implications. New! 2020 AHA Guidelines - Updated! ACLS content and reorganized to appear at the beginning of the Emergency section Content licensed from printed editionISBN 10: 1719646252 Content licensed from printed edition ISBN 13: 9781719646253 SUBSCRIPTION : Please purchase a yearly auto-renewing subscription to receive content access and available updates. Yearly auto-renewing payments- $29.99 Payment will be charged to your iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Subscription may be managed by the user and auto-renewal can be disabled at any time by going to your device “Settings” and tapping “iTunes & App Store”. Any unused portion of a free trial period will be forfeited when you purchase a subscription, where applicable." If you have any questions or comments, email us any time: customersupport@skyscape.com or call 508-299-3000 Privacy Policy - https://www.skyscape.com/terms-of-service/privacypolicy.aspx Terms and Conditions - https://www.skyscape.com/terms-of-service/licenseagreement.aspx Author(s): Ehren Myers Publisher: F. A. Davis Company

Screenshots

Davis’s Lab & Diagnostic Tests4 screens
RNotes4 screens

Verdict

The call

The clearest difference is ads: Davis’s Lab & Diagnostic Tests at none against RNotes's shown. Davis’s Lab & Diagnostic Tests also leads on ratings volume (84 vs 26). RNotes's advantage is rating (5.0 vs 4.7) and iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases and monetization model 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. Davis’s Lab & Diagnostic Tests sells 1 one-off in-app purchase and RNotes sells 3 in-app purchases, starting at $29.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

RNotes holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 84 and 26 respectively.

UpkeepUpdate frequency

Davis’s Lab & Diagnostic Tests ships an update every 8 months, RNotes every 5 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard4 real differences · 6 level
Davis’s Lab & Diagnostic Tests versus RNotes: the parameters behind the verdict, then further details
ParameterDavis’s Lab & Diagnostic TestsRNotes
PriceFreeFree
Rating4.7 (84 ratings)5.0 (26 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings84 — better26
Update frequencyEvery 8 monthsEvery 5 months — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size10 MB46 MB
Age rating+1717+
DeveloperUnbound Medicine, Inc.Skyscape Medpresso Inc

Customer experience

Davis’s Lab & Diagnostic Tests

All ratings84 ratings
Positive94.0%
Neutral1.2%
Negative4.8%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

RNotes

All ratings26 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Davis’s Lab & Diagnostic Tests

One-time1
  • Davis's Lab and Dx Tests$49.99
3 purchases

RNotes

Subscriptions1
  • RNotes 1/Y Sub$29.991 Year
One-time2
  • RNotes®: Nurse's Clinical Pock$29.99
  • RNotes Ed.6$29.99

Questions

Is Davis’s Lab & Diagnostic Tests free?
Davis’s Lab & Diagnostic Tests is free to download, with in-app purchases available.
Is RNotes free?
RNotes is free to download, with in-app purchases available.
Which has better reviews, Davis’s Lab & Diagnostic Tests or RNotes?
RNotes is rated higher. Davis’s Lab & Diagnostic Tests averages 4.7 out of 5 from 84 ratings, while RNotes averages 5.0 from 26 ratings.
Do Davis’s Lab & Diagnostic Tests or RNotes have ads?
RNotes shows ads; Davis’s Lab & Diagnostic Tests does not.
Which is updated more often, Davis’s Lab & Diagnostic Tests or RNotes?
Davis’s Lab & Diagnostic Tests ships an update every 8 months, and RNotes every 5 months. Most recently, Davis’s Lab & Diagnostic Tests was updated on November 1, 2026 and RNotes on November 2, 2026.

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