Eye Chart HD vs LooC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Randomized Snellen charts
- Tumbling E charts
- Pocket vision screener
- Line randomization
- Chart selector
- Near vision chart (subscription)
- Amsler Grid (subscription)
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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.”
LooC
Monitor your eye health and vision changes from anywhere. This app offers multiple tests including near and distance vision, color perception, and an Amsler grid. Save and share your results to track your progress.
- Near Vision Test
- Distance Vision Test
- Color Vision Test
- Amsler Test
- Share and save results
- Facial recognition
- Color diagrams
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Keep in track of your eye health whenever you want and wherever you are. Check if and how your eye vision changes. Learn more about your eyes with four different LooC tests: 1. Near Vision 2. Distance Vision 3. Color Vision 4. Amsler Test 5. Share and save results Easy in usage, LooC uses innovative tests and the latest software to measure your eyesight. This is how it works: - Facial recognition - Color diagrams - Determination – field of visual
Screenshots
Verdict
The clearest difference is in-app purchases: LooC at none against Eye Chart HD's 2. LooC also leads on ads (none vs shown) and review sentiment (65% vs 33%). On price, rating, update cadence and iOS requirement 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
Both are free to download. Eye Chart HD sells 2 in-app purchases, starting at $2.99 per month. LooC asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.4 for Eye Chart HD against 4.4 for LooC. Both are backed by a comparable volume of ratings — 7 and 25 respectively. Written reviews are what separate them: 33% of Eye Chart HD's written reviews are positive against 65% of LooC's.
Eye Chart HD ships an update every 6 months, LooC every 4 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.
| Parameter | Eye Chart HD | LooC |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) — better | 4.4 (25 ratings) |
| Positive reviews | 33.3% of reviews | 64.5% of reviews — better |
| Number of ratings | 7 | 25 — better |
| Update frequency | Every 6 months | Every 4 months — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 31 MB | 29 MB |
| Age rating | 4+ | 12+ |
| Developer | Dok LLC | LooC GmbH |
Customer experience
Eye Chart HD
LooC
In-app purchases
Eye Chart HD
- Professional Subscription$2.991 Month
- Eye Chart HD Full Version$0.99
LooC
No in-app purchases








