Comparison

Eye Chart HD vs Eolas Medical

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

Head to head
About

Eye Chart HD

This app provides a clinically evaluated visual acuity screening tool for various settings. It offers randomized Snellen, Tumbling E, and other charts to help assess vision, especially when traditional charts are unavailable or memorized. Additional features are available through a monthly subscription.

Highlights
  • Randomized Snellen charts
  • Tumbling E charts
  • Pocket vision screener
  • Line randomization
  • Chart selector
  • Near vision chart (subscription)
  • Amsler Grid (subscription)
Read full description

Easy to use, clinically evaluated visual acuity screening app. Over 1M people have downloaded our mobile electronic eye charts for iOS. Read below for more information on the clinical evaluations. Useful for: - Triaging - House visits - Hospital rounds - Emergency rooms - Schools - Patients who have memorized the office chart Eye Chart HD is a pocket vision screener: randomized Snellen, Tumbling E, and other charts to offer a rough but useful screen of visual acuity. Simply press a button to randomize the entire eye chart, or touch an individual line of the chart to randomize that line. Swipe right for the chart selector. Eye care professionals around the world use Snellen Eye Charts to measure visual acuity. However, patients often memorize the classic Snellen chart, leading to less accurate vision measurements. Enter Eye Chart HD! Though this unique, pocket-sized randomizable eye chart should not be used as a primary visual acuity measuring tool, it can provide a handy rough vision screen when a chart is not available, or it can be used to complement static, wall-based Snellen charts. Subscription: In addition to our free features, Eye Chart HD offers a subscription to exclusive paid features, including the Randomizable Near Vision Chart, Line Isolation, Amsler Grid, and Single Optotype Charts! The subscription costs $2.99 per month of access and has to be purchased specially within the app. Once purchased, it is available through an auto-renewing subscription which will renew each month for your convenience until you choose to turn it off. Please let us know if you have any questions about your subscription at eyechartapp@gmail.com. Below is further information on clinical evaluations that have been done. Please do check out the papers cited below if you have concerns. We didn't do these tests and can't speak to them, but we are providing them here for transparency and your reference:  Snellen & Tumbling E charts on Eye Chart HD on iPhone: “Comparison of Visual Acuity Measurement Using Three Methods: Standard ETDRS Chart, Near Chart and a Smartphone-Based Eye Chart Application” Clinical Ophthalmology. Conclusion: “VA measurements with the Near Chart and smartphone-based Eye Chart application corresponded well to the standard ETDRS chart, suggesting potential utility of alternative portable VA tests for in-office or remote vision monitoring, particularly during periods of physical distancing such as the Coronavirus disease 2019 (COVID-19) era” Sloan Chart on Eye Chart HD on iPhone: “Does the EyeChart App for iPhones Give Comparable Measurements to Traditional Visual Acuity Charts?” The British and Irish Orthoptic Journal. Conclusion: “This study found that the VA scores achieved on the EyeChart app are comparable to those achieved using the gold-standard ETDRS chart in a healthy young adult population. This is a promising finding; however, it is necessary for further large-scale studies to investigate the EyeChart app when used on a variety of patient population groups.” Snellen Chart on Eye Chart HD on iPad Mini: “Comparative Study of the Snellen iPad App versus Traditional Light Box Snellen Chart in Distance Visual Acuity” International Journal of Ophthalmology and Clinical Research. Conclusion: “It showed that the results from Eye Chart HD app used in an iPad Mini 2 agreed with the results of the traditional light-box Snellen Chart when used at the Outpatient Department.“ Rapid Vision Screening Chart on Eye Chart HD on iPhone/iPod: “Assessment of a rapid method to determine approximate visual acuity in large surveys and other such settings.” American Journal of Ophthalmology. Conclusion: “An iPod application requiring about a 1-minute testing time provides an objective, portable, rapid, and low-cost method to determine approximate VA, allowing VA testing to be performed efficiently in large surveys and other settings where approximate VA should be measured.”

About

Eolas Medical

This app provides healthcare professionals with access to essential guidelines, online learning modules, and resources. It aims to streamline educational processes, departmental induction, and knowledge sharing for increased efficiency.

Highlights
  • Access medical guidelines
  • Online learning modules
  • Streamline induction processes
  • Improve departmental teaching
  • Facilitate knowledge sharing
  • Enhance patient care resources
Features
Read full description

Eolas App is a tool to help innovate the way we educate our healthcare professionals and how we care for our patients. Access specific guidelines, online learning, and other useful resources from the palm of your hand. Streamline your department's induction and departmental teaching processes and knowledge sharing to save time and make everyone's work more efficient.

Screenshots

Eye Chart HD4 screens
Eolas Medical4 screens

Verdict

The call

The clearest difference is rating: Eye Chart HD at 5.0 against Eolas Medical's 4.2. Eye Chart HD also leads on review sentiment (33% vs 19%) and iOS requirement (12.0 vs 15.5). Eolas Medical's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price 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. Eye Chart HD sells 2 in-app purchases, starting at $2.99 per month. Eolas Medical asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Eye Chart HD holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Eolas Medical has 372 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 33% of Eye Chart HD's written reviews are positive against 19% of Eolas Medical's.

UpkeepUpdate frequency

Eye Chart HD ships an update every 6 months, Eolas Medical every 6 days. The most recent releases landed on October 17, 2026 and October 18, 2026 respectively.

Scorecard8 real differences · 2 level
Eye Chart HD versus Eolas Medical: the parameters behind the verdict, then further details
ParameterEye Chart HDEolas Medical
PriceFreeFree
Rating5.0 (5 ratings) — better4.2 (372 ratings)
Positive reviews33.3% of reviews — better18.8% of reviews
Number of ratings5372 — better
Update frequencyEvery 6 monthsEvery 6 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPod
Requires iOS12.0 — better15.5
Further details — not scored
Size31 MB127 MB
Age rating4+17+
DeveloperDok LLCEolas Medical LTD

Customer experience

Eye Chart HD

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews30 reviews
Positive33.3%
Neutral10.0%
Negative56.7%

Eolas Medical

All ratings372 ratings
Positive78.8%
Neutral2.7%
Negative18.5%
Written reviews64 reviews
Positive18.8%
Neutral3.1%
Negative78.1%

Bugs and requests

Eye Chart HD

Not enough reviews yet to summarise bugs or requests.

Eolas Medical

Reported bugs

9 issues
  • Broken hyperlinks within articles
  • Keyboard doesn't pop up automatically in search
  • Content fails to load on WiFi and data networks
  • App crashes or freezes on startup
  • Server connection drops during use
Show 4 more
  • Search suggestions don't auto-populate
  • WikEM inaccessible past loading screen
  • Inconsistent body systems display
  • Slow download attempts on app open

Requested features

10 requests
  • Restore standalone WikEM app
  • Reduce navigation steps to access WikEM
  • Implement dark mode/dark theme
  • Add favorites/bookmarking functionality
  • Improve search algorithm accuracy
Show 5 more
  • Enable offline content download
  • Add collaborative checklist features
  • Optimize iPad/tablet interface
  • Restore MDCalc integration
  • Simplify app navigation structure

In-app purchases

2 purchases

Eye Chart HD

Subscriptions1
  • Professional Subscription$2.991 Month
One-time1
  • Eye Chart HD Full Version$0.99
None

Eolas Medical

No in-app purchases

Questions

Is Eye Chart HD free?
Eye Chart HD is free to download, with in-app purchases available.
Is Eolas Medical free?
Eolas Medical is free to download, with no in-app purchases.
Which has better reviews, Eye Chart HD or Eolas Medical?
Eye Chart HD is rated higher. Eye Chart HD averages 5.0 out of 5 from 5 ratings, while Eolas Medical averages 4.2 from 372 ratings.
Do Eye Chart HD or Eolas Medical have ads?
Eye Chart HD shows ads; Eolas Medical does not.
Which is updated more often, Eye Chart HD or Eolas Medical?
Eye Chart HD ships an update every 6 months, and Eolas Medical every 6 days. Most recently, Eye Chart HD was updated on October 17, 2026 and Eolas Medical on October 18, 2026.

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