Comparison

ICD 10 Coding Guide 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

ICD 10 Coding Guide

Quickly find the latest ICD-10 medical codes with this offline mobile app. Search by code, disease, injury, drug, or keyword. Features include color-coded trees, notes, highlights, and favorites for efficient code assignment.

Highlights
  • Offline ICD-10-CM code access
  • Rapid search by code, disease, or keyword
  • Color-keyed Code Trees
  • Notes and highlights
  • Favorites for quick access
  • Companion website
Features
Read full description

** Fast & accurate lookup of the latest ICD-10 Codes ** ICD-10 CODING GUIDE is a powerful mobile app developed by Unbound Medicine, an award-winning health care information provider with more than 5 million users worldwide. Featuring the latest ICD-10-CM data from the Centers for Medicare and Medicaid Services (CMS), this premium app helps you quickly identify the most appropriate code on your smartphone or tablet — with rapid search by code, disease, injury, drug, or keyword. No internet access is required after initial content download. FEATURES • Access to all ICD-10-CM codes • Code and keyword search for fast discovery • Color-keyed Code Trees for accurate code assignment • Make notes and highlights within any entry • 'Favorites' for bookmarking commonly used codes • Companion website for desktop convenience FREE TRIAL: What To Expect • First-time users are offered a Free Trial of Unbound's complete ICD-10 Coding Guide • After the Free Trial period ends, your iTunes account will be charged $9.99 for a one-year subscription unless you have turned off auto-renew at least 24 hours before the free trial ends. • To manage your subscriptions, open Apple's "Settings" app, tap your Apple ID at the top of the screen, tap Subscriptions, then tap the subscription you wish to manage. • NOTE: if you choose not to purchase a subscription, content will no longer be viewable after the free-trial period ends. Subscription Renewals • Your subscription will automatically renew annually and your iTunes account will be charged $9.99 unless auto-renew is turned off 24 hours prior to the end of the one-year period. • If you choose not to renew, you can continue to use the product but will not receive content updates. • To manage your subscriptions, open Apple's "Settings" app, tap your Apple ID at the top of the screen, tap Subscriptions, then tap the subscription you wish to manage. Unbound Privacy Policy: https://www.unboundmedicine.com/privacy Unbound Medicine Terms of Use: https://www.unboundmedicine.com/end_user_license_agreement

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

ICD 10 Coding Guide4 screens
Ferri's Best Test4 screens

Verdict

The call

The clearest difference is monetization model: Ferri's Best Test at free with in-app purchases against ICD 10 Coding Guide's subscription. Ferri's Best Test also leads on rating (4.8 vs 4.4) and iOS requirement (13.0 vs 15.0). ICD 10 Coding Guide's advantage is ads (none vs shown) and ratings volume (167 vs 26). On price, update cadence, in-app purchases 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. ICD 10 Coding Guide sells 1 in-app purchase, starting at $9.99 per year 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 4.4. That said, the two scores are not equally well evidenced: ICD 10 Coding Guide has 167 ratings behind it against 26, so its average is the more settled of the two.

UpkeepUpdate frequency

ICD 10 Coding Guide ships an update every 11 months, Ferri's Best Test every 6 months. Both last shipped on November 2, 2026.

Scorecard5 real differences · 5 level
ICD 10 Coding Guide versus Ferri's Best Test: the parameters behind the verdict, then further details
ParameterICD 10 Coding GuideFerri's Best Test
PriceFreeFree
Rating4.4 (167 ratings)4.8 (26 ratings) — better
Positive reviews16.7% of reviews—
Number of ratings167 — better26
Update frequencyEvery 11 monthsEvery 6 months — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size14 MB149 MB
Age rating17+17+
DeveloperUnbound Medicine, Inc.Skyscape Medpresso Inc

Customer experience

ICD 10 Coding Guide

All ratings167 ratings
Positive87.4%
Neutral1.8%
Negative10.8%
Written reviews12 reviews
Positive16.7%
Neutral0.0%
Negative83.3%

Ferri's Best Test

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

In-app purchases

1 purchases

ICD 10 Coding Guide

Subscriptions1
  • ICD-10-CM Coding Guide14 Days trial$9.991 Year
1 purchases

Ferri's Best Test

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

Questions

Is ICD 10 Coding Guide free?
ICD 10 Coding Guide 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, ICD 10 Coding Guide or Ferri's Best Test?
Ferri's Best Test is rated higher. ICD 10 Coding Guide averages 4.4 out of 5 from 167 ratings, while Ferri's Best Test averages 4.8 from 26 ratings.
Do ICD 10 Coding Guide or Ferri's Best Test have ads?
Ferri's Best Test shows ads; ICD 10 Coding Guide does not.
Which is updated more often, ICD 10 Coding Guide or Ferri's Best Test?
ICD 10 Coding Guide ships an update every 11 months, and Ferri's Best Test every 6 months. Most recently, ICD 10 Coding Guide was updated on November 2, 2026 and Ferri's Best Test on November 2, 2026.

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