Comparison

COE Prep vs The Wills Eye Manual

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

Head to head
About

COE Prep

Prepare for your Certified Ophthalmic Executive exam with official flashcards. This app offers over 300 practice questions covering key areas of ophthalmic administration, with detailed explanations and progress tracking. Study efficiently anytime, anywhere.

Highlights
  • 300+ exam-like practice questions
  • Detailed explanations for answers
  • Covers 6 key exam categories
  • Tag questions for quick review
  • Immediate progress feedback
  • Study anytime, anywhere
Read full description

Created in partnership with the American Society of Ophthalmic Administrators (ASOA), the COE Exam Prep app is a vital resource on your path to pass your Certified Ophthalmic Executive exam. ASOA's official COE Exam Prep app features over 300 exam-like questions in the areas of General Ophthalmic Knowledge, Financial Management, Operations, Information Technology Management, Human Resources, and Risk Management and Regulatory Compliance. Install the free version today and jump-start your studying! We have provided a limited free version of the app that you can try before deciding to upgrade. This version includes a limited amount of practice questions and basic progress metrics. Get your best value by upgrading to the Premium version with a one-time in-app purchase that includes lifetime access to: • 300+ exam-like practice questions with detailed explanations • Created in partnership with ASOA • Tag questions within categories for quick review • Immediate feedback to track your overall progress • Covers all 6 categories on the COE exam, including: • General Ophthalmic Knowledge • Financial Management • Operations • Information Technology Management • Human Resources • Risk Management and Regulatory Compliance Created by Certified Ophthalmic Executives, COE Exam Prep by ASOA allows you to study efficiently—anytime anywhere. Questions? Feedback? Email us at professional@hltcorp.com Questions were reviewed, researched, and sourced by a peer group of Certified Ophthalmic Executives. The resources used to create these questions come directly from the COE Suggested Study Resources List. Every effort has been made to ensure questions and answers are relevant and correct. Any suspected errors should be brought to the attention of ASOA by emailing us at professional@hltcorp.com.

About

The Wills Eye Manual

This pocket guide offers expert diagnosis and treatment tips for over 200 ophthalmic conditions. It features high-quality images, step-by-step protocols, and quick-reference tables, making it ideal for eye care professionals and trainees.

Highlights
  • 200+ ophthalmic conditions
  • Expert diagnosis and treatment tips
  • High-quality images
  • Step-by-step protocols
  • Quick-reference tables
  • Expanded video library
Features
Currently charting
Read full description

"Try before you buy" - Download the FREE App, which includes sample content. In-App purchase required to unlock all content. The Wills Eye Manual®, 9th Edition is the ultimate pocket guide for eye care! Packed with expert diagnosis and treatment tips, high-quality images, and step-by-step protocols, it’s perfect for ophthalmologists, optometrists, and trainees. Quick-reference tables and online videos make mastering eye emergencies easy—your go-to resource for confident patient care! For more than 35 years, The Wills Eye Manual, originally edited by Drs. Christopher J. Rapuano and Mark A. Friedberg, has remained a best-selling source of authoritative guidance on treating ocular disorders in an office, emergency room, or hospital setting. Offering information on more than 200 ophthalmic conditions, effective recommendations from initial workup and diagnosis through extended treatment, and a concise outline format designed for portability and quick reference, the ninth edition of this trusted manual is a comprehensive, high-yield resource for both trainees and seasoned practitioners. - Provides current, superbly illustrated information on 200+ ophthalmic conditions in a handy, portable manual, along with extensive multimedia content - Offers easily accessible clinical recommendations for evaluation, diagnosis, workup, and treatment - Addresses changing trends in oculoplastics, glaucoma, cornea, pediatrics, neuro-ophthalmology, uveitis, retina, and more - Includes an expanded video library covering a wide range of common procedures with step-by-step narration, carefully selected to complement key techniques - Contains up-to-date content from cover to cover, with all chapters written and edited by the residents and attending ophthalmologists at one of the busiest and largest eye hospitals in the country Content licensed from printed ISBN 13: 9781975243722 Content licensed from printed ISBN 10: 1975243722 SUBSCRIPTION : Please purchase a yearly auto-renewing subscription to receive content access and continuous updates. Your subscription automatically renews every year, so you always have the latest content. Yearly auto-renewing payments- $94.99 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): Christopher J. RAPUANO Publisher: Lippincott Williams & Wilkins

Screenshots

COE Prep4 screens
The Wills Eye Manual4 screens

Verdict

The call

The clearest difference is ads: COE Prep at none against The Wills Eye Manual's shown. COE Prep also leads on update cadence (every 3 weeks vs every 5 months) and review sentiment (76% vs 60%). The Wills Eye Manual's advantage is chart position (#168 vs unranked). On price, rating, ratings volume 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. COE Prep sells 1 one-off in-app purchase and The Wills Eye Manual sells 7 in-app purchases, starting at $48.99 per 3 months. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for COE Prep against 4.7 for The Wills Eye Manual. Both are backed by a comparable volume of ratings — 89 and 127 respectively. Written reviews are what separate them: 76% of COE Prep's written reviews are positive against 60% of The Wills Eye Manual's.

UpkeepUpdate frequency

COE Prep ships an update every 3 weeks, The Wills Eye Manual every 5 months. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

Scorecard5 real differences · 6 level
COE Prep versus The Wills Eye Manual: the parameters behind the verdict, then further details
ParameterCOE PrepThe Wills Eye Manual
PriceFreeFree
Rating4.8 (89 ratings) — better4.7 (127 ratings)
Positive reviews76.2% of reviews — better60.0% of reviews
Number of ratings89127 — better
Update frequencyEvery 3 weeks — betterEvery 5 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#168 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS10.0 — better13.0
Further details — not scored
Size121 MB47 MB
Age rating4++17
DeveloperHigher Learning TechnologiesSkyscape Medpresso Inc

Customer experience

COE Prep

All ratings78 ratings
Positive93.6%
Neutral3.8%
Negative2.6%
Written reviews21 reviews
Positive76.2%
Neutral0.0%
Negative23.8%

The Wills Eye Manual

All ratings127 ratings
Positive92.1%
Neutral3.1%
Negative4.7%
Written reviews5 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

In-app purchases

1 purchases

COE Prep

One-time1
  • COE Exam Prep$99.99
7 purchases

The Wills Eye Manual

Subscriptions7
  • The Wills Eye Manual 3M Sub$48.993 Months
  • The Wills Eye Manual 6M Sub$63.996 Months
  • 25% off-Wills Eye Manual 1YSub$71.991 Year
Show 4 more
  • Wills Eye Manual 1Y offer Sub$75.991 Year
  • 20% off-Wills Eye Manual 1YSub$75.991 Year
  • 15% off-Wills Eye Manual 1YSub$80.991 Year
  • The Wills Eye Manual 1Y Sub$94.991 Year

Questions

Is COE Prep free?
COE Prep is free to download, with in-app purchases available.
Is The Wills Eye Manual free?
The Wills Eye Manual is free to download, with in-app purchases available.
Which has better reviews, COE Prep or The Wills Eye Manual?
COE Prep is rated higher. COE Prep averages 4.8 out of 5 from 89 ratings, while The Wills Eye Manual averages 4.7 from 127 ratings.
Do COE Prep or The Wills Eye Manual have ads?
The Wills Eye Manual shows ads; COE Prep does not.
Which is updated more often, COE Prep or The Wills Eye Manual?
COE Prep ships an update every 3 weeks, and The Wills Eye Manual every 5 months. Most recently, COE Prep was updated on October 31, 2026 and The Wills Eye Manual on November 6, 2026.

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