Comparison

Guide to Diagnostic Tests vs Ferri's Best Test

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

Head to head
About

Guide to Diagnostic Tests

Access evidence-based information on over 450 diagnostic tests, including lab work, imaging, and therapeutic monitoring. This resource helps healthcare professionals quickly find answers to common questions about test selection, interpretation, and patient preparation.

Highlights
  • 450+ diagnostic tests
  • Evidence-based recommendations
  • Algorithms, tables, and charts
  • PubMed links
  • Custom notes and highlighting
  • Full-text search
  • Favorites for bookmarking
Features
Read full description

ABOUT GUIDE TO DIAGNOSTIC TESTS Pocket Guide to Diagnostic Tests, provides immediate, evidence-based information on the selection and interpretation of commonly used laboratory and electrocardiographic tests, diagnostic imaging, and therapeutic monitoring. Including more than 450 updated diagnostic tests, this mobile resource is ideal for answering questions encountered daily by physicians, nurses, students, and other healthcare professionals, such as: • Which test is best to diagnose or follow a patient’s condition? • What is the correct interpretation of an abnormal diagnostic test? • How do I collect the appropriate specimen or prepare the patient for testing? • Where can I find more information on this test in the medical literature? FEATURES • 450+ updated laboratory and diagnostic tests • Evidence-based recommendations • New and updated coverage of emerging and re-emerging pathogens and infectious agents • Extensive use of algorithms, tables, and charts • PubMed links directly to journal citations and available articles • Highlight and make custom notes within any entry • Full Text Search – find topics across from any entry • ‘Favorites’ for bookmarking important entries Editors: Diana Nicoll, MD, PhD, MPA; Chuanyi Mark Lu, MD; Stephen J. McPhee, MD Publisher: McGraw Hill Powered by: Unbound Medicine

About

Ferri's Best Test

This medical reference app provides guidance on laboratory and imaging approaches for over 400 tests and 230 diseases. It features interactive flowcharts, IU units, and concise clinical material to aid in test selection and diagnostic skills.

Highlights
  • Over 400+ tests and labs
  • Guidance on radio-logic & laboratory approaches
  • 230+ common diseases
  • Interactive flowcharts
  • IU units for all tests
  • SmartSearch technology
Features
Read full description

"Try before you buy" - Download the FREE App, which includes sample content. An in-App purchase is required to unlock all content. Based on 4th print ed. Guidance on radio-logic & laboratory approaches. Over 400+ tests & labs. 230+ common diseases. Interactive flowcharts. IU units for all tests. Practical and concise, go-to reference for up-to-date clinical material on today's diagnostic testing and laboratory tests. Three convenient sections provide quick access to key information on clinical laboratory testing, diagnostic imaging, and diagnostic algorithms. Experienced author Dr. Fred Ferri uses a unique, easy-to-follow format to simplify complex information and help you choose the best test to supplement your clinical diagnostic skills. New to this Edition * Features a new appendix on when to use contrast agents in ordering CT and MRI scans. * Discusses new modalities including transient elastography (Fibroscan), CT enterography and CT enteroclysis. * Provides new comparison tables to easily evaluate the best test; new algorithms for evaluation of immunodeficiency and hematochezia; and new tables and illustrations throughout to improve your test selection. Key Features * Includes both lab and imaging tests for concise, convenient access to all diagnostic test options for more than 200 common diseases and disorders. * Includes essential information on indications, advantages, disadvantages, approximate costs, normal ranges, typical abnormalities, likeliest causes, and more. No internet connection is required to access the content after the initial download. Find information quickly using powerful SmartSearch technology. Search part of term for those hard to spell medical terms. Content licensed from printed ISBN 10: 0323511406 Content licensed from printed ISBN 13: 9780323511407 If you have any questions or comments, email us any time: customersupport@skyscape.com or call 508-299-30000 Privacy Policy-https://www.skyscape.com/terms-of-service/privacypolicy.aspx Terms and Conditions-https://www.skyscape.com/terms-of-service/licenseagreement.aspx Editor(s): Fred F. Ferri, MD, FACP Publisher: Mosby | Elsevier, Inc.

Screenshots

Guide to Diagnostic Tests4 screens
Ferri's Best Test4 screens

Verdict

The call

The clearest difference is ads: Guide to Diagnostic Tests at none against Ferri's Best Test's shown. Ferri's Best Test's advantage is rating (4.8 vs 4.6) and iOS requirement (13.0 vs 15.0). On price, ratings volume, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Guide to Diagnostic Tests sells 1 one-off in-app purchase and Ferri's Best Test sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Ferri's Best Test holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 35 and 26 respectively.

UpkeepUpdate frequency

Guide to Diagnostic Tests ships an update every 9 months, Ferri's Best Test every 6 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Guide to Diagnostic Tests versus Ferri's Best Test: the parameters behind the verdict, then further details
ParameterGuide to Diagnostic TestsFerri's Best Test
PriceFreeFree
Rating4.6 (35 ratings)4.8 (26 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings35 — better26
Update frequencyEvery 9 monthsEvery 6 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 MB149 MB
Age rating17+17+
DeveloperUnbound Medicine, Inc.Skyscape Medpresso Inc

Customer experience

Guide to Diagnostic Tests

All ratings35 ratings
Positive88.6%
Neutral5.7%
Negative5.7%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Ferri's Best Test

All ratings25 ratings
Positive92.0%
Neutral8.0%
Negative0.0%

In-app purchases

1 purchases

Guide to Diagnostic Tests

One-time1
  • Pocket Guide to Diagnostic Tests$54.99
1 purchases

Ferri's Best Test

One-time1
  • Ferri's Best Test - Lab & Diag$40.99

Questions

Is Guide to Diagnostic Tests free?
Guide to Diagnostic Tests is free to download, with in-app purchases available.
Is Ferri's Best Test free?
Ferri's Best Test is free to download, with in-app purchases available.
Which has better reviews, Guide to Diagnostic Tests or Ferri's Best Test?
Ferri's Best Test is rated higher. Guide to Diagnostic Tests averages 4.6 out of 5 from 35 ratings, while Ferri's Best Test averages 4.8 from 26 ratings.
Do Guide to Diagnostic Tests or Ferri's Best Test have ads?
Ferri's Best Test shows ads; Guide to Diagnostic Tests does not.
Which is updated more often, Guide to Diagnostic Tests or Ferri's Best Test?
Guide to Diagnostic Tests ships an update every 9 months, and Ferri's Best Test every 6 months. Most recently, Guide to Diagnostic Tests was updated on October 27, 2026 and Ferri's Best Test on October 24, 2026.

Other comparisons