Comparison

COE Prep vs AAO eBooks

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

AAO eBooks

Access essential ophthalmology textbooks on your mobile device. Search, browse, and download purchased eBooks for offline use. Enhance learning with notes, highlights, and CME credit opportunities.

Highlights
  • Access purchased eBooks
  • Offline reading capability
  • Search and browse content
  • Highlighting and note-taking
  • Bookmark functionality
  • Earn CME credits
Features
Read full description

In the busy, demanding profession of ophthalmology, it is important to have access to up-to-date, reliable information at all times. With the American Academy of Ophthalmology’s eBook app, you get convenient access to essential Academy textbooks from your iPad or iPhone. Download this free app to: • Search, browse and access your purchased eBooks online, or download them for offline use • Quickly find relevant images and videos • Customize your learning with easy highlighting, note-taking and bookmarking • Participate in activities that provide opportunities for earning continued medical education (CME) credits (selected titles only, see individual publications for more information) Academy publications are written and reviewed by expert ophthalmologists and are designed to help you improve patient outcomes and practice efficiency. Academy eBooks must be purchased from the Academy before they can be accessed via the app. First, download this app to your device, then visit AAO Store to make your purchase. Return to the Academy eBook app anytime you want to read your eBooks. About the Academy: The American Academy of Ophthalmology is the world's largest association of eye physicians and surgeons with more than 32,000 members worldwide. Eye health care is provided by the three "O's" – ophthalmologists, optometrists, and opticians. It is the ophthalmologist who has the education and training to treat it all: eye diseases, infections and injuries, and perform eye surgery. Ophthalmologists provide comprehensive eye care, ranging from optical to medical to surgical. The mission of the Academy is to advance the lifelong learning and professional interests of ophthalmologists to ensure that the public can obtain the best possible eye care. Academy members are dedicated to enhancing the quality of life for every individual they treat by helping each to see his or her best and by protecting their patients' vision and eye health throughout life. Academy members are committed to responding compassionately to their patients' individual needs and to advancing the highest standards of comprehensive eye care. The American Academy of Ophthalmology is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians.

Screenshots

COE Prep4 screens
AAO eBooks4 screens

Verdict

The call

The clearest difference is review sentiment: COE Prep at 76% against AAO eBooks's 18%. COE Prep also leads on rating (4.8 vs 3.8) and update cadence (every 3 weeks vs every 3 months). AAO eBooks's advantage is in-app purchases (none vs 1). 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. COE Prep sells 1 one-off in-app purchase. AAO eBooks asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

COE Prep holds the better App Store score, 4.8 against 3.8. That said, the two scores are not equally well evidenced: COE Prep has 78 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 76% of COE Prep's written reviews are positive against 18% of AAO eBooks's.

UpkeepUpdate frequency

COE Prep ships an update every 3 weeks, AAO eBooks every 3 months. The most recent releases landed on September 19, 2026 and June 6, 2026 respectively.

Scorecard7 real differences · 3 level
COE Prep versus AAO eBooks: the parameters behind the verdict, then further details
ParameterCOE PrepAAO eBooks
PriceFreeFree
Rating4.8 (78 ratings) — better3.8 (5 ratings)
Positive reviews76.2% of reviews — better18.2% of reviews
Number of ratings78 — better5
Update frequencyEvery 3 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better14.0
Further details — not scored
Size121 MB78 MB
Age rating4+17+
DeveloperHigher Learning TechnologiesAmerican Academy of Ophthalmology, Inc.

Customer experience

COE Prep

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

AAO eBooks

All ratings5 ratings
Positive60.0%
Neutral20.0%
Negative20.0%
Written reviews11 reviews
Positive18.2%
Neutral9.1%
Negative72.7%

In-app purchases

1 purchases

COE Prep

One-time1
  • COE Exam Prep$99.99
None

AAO eBooks

No in-app purchases

Questions

Is COE Prep free?
COE Prep is free to download, with in-app purchases available.
Is AAO eBooks free?
AAO eBooks is free to download, with no in-app purchases.
Which has better reviews, COE Prep or AAO eBooks?
COE Prep is rated higher. COE Prep averages 4.8 out of 5 from 78 ratings, while AAO eBooks averages 3.8 from 5 ratings.
Do COE Prep or AAO eBooks have ads?
Neither COE Prep nor AAO eBooks shows ads.
Which is updated more often, COE Prep or AAO eBooks?
COE Prep ships an update every 3 weeks, and AAO eBooks every 3 months. Most recently, COE Prep was updated on September 19, 2026 and AAO eBooks on June 6, 2026.

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