Eye Charts is a professionally designed visual acuity testing app that makes it easy to accurately check, record, and track vision over time in children aged 6 and above, whether you are a parent monitoring a child’s eyesight at home or a healthcare professional performing routine screening in practice. Early detection of myopia allows you to take preventive action, seek medical advice promptly, and prevent pseudomyopia from worsening into myopia or stop nearsightedness from deteriorating further.
DESIGNED TO REDUCE VARIABILITY
Unlike paper charts that fade, warp, or become memorized over time, Eye Charts presents optically accurate optotypes that are randomized for every test. This helps ensure more meaningful results for repeated testing at home, in schools, clinics, or telehealth settings.
Supported charts include:
* Snellen
* ETDRS
* Landolt C
* Tumbling E
* HOTV
* Numbers
* Shapes
The charts use LogMAR scaling of letter size across rows, and support multiple visual acuity notations for scoring, including: Fraction, LogMAR, MAR, Decimal and VAS.
Flexible test distances allow accurate use in small rooms, hallways, or ad‑hoc spaces.
Displayed on iOS and Android devices, Eye Charts is self‑illuminated, so the chart’s visibility does not depend on room lighting or weather. Screen brightness is adjustable and can be set appropriately for longer testing distances such as 6 meters.
Scenarios:
1. Doctor and Patient.
2. Self-diagnosis using a mirror – Stand in front of a mirror with the app in mirror mode, wearing an eye patch over one eye. The effective test distance is twice the distance between you and the mirror.
3. Self-diagnosis using a Bluetooth keyboard – Place the device a few meters away on a table, and use the keyboard arrow keys to indicate what you can read.
SEE TRENDS, NOT JUST SNAPSHOTS
Test results can be recorded for individual subjects and visualized over time using simple line graphs, making it easier to identify:
* Gradual changes in vision
* Stability after intervention
This longitudinal view is valuable for parents monitoring children’s eyesight and for clinicians tracking changes across visits.
INDEPENDENTLY EVALUATED ACCURACY
Eye Charts was previously published as Visual Acuity Charts. Under that name, it was independently evaluated in a peer‑reviewed academic study published in JAMA Ophthalmology and available via PubMed Central on https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7809609/. In that study, researchers objectively compared multiple iPhone‑based visual acuity apps by physically measuring optotype accuracy across devices. Visual Acuity Charts demonstrated the lowest measurement error among the apps evaluated, making it the most accurate app tested in that comparison.
Myopia detection involves several steps, with distance visual acuity testing often being the first. A decline in visual acuity may indicate the onset of myopia, enabling early intervention.
DISCLAIMER:
While this app may replace printed eye charts, it CANNOT replace doctors or optometrists who perform comprehensive eye exams essential for maintaining eye health. The app does not test for strabismus, esotropia, exotropia, hyperopia, or astigmatism—common early vision conditions. Please consult an optometrist regularly and seek professional medical advice at the first signs of visual acuity issues.
App was free a few days ago now patients have to pay because they need it because of covid19Pretty bad and lacking human decency
Developer Response
There had been a 1 week promotion during which the purchase price was zero. App Store does NOT allow a free app to become a paid app, and this app has been a paid app. And you may request a refund from App Store.
Shame on you for profiteering during COVID pandemic!
Reviewforyou*
Profiteering during this crisis when people and companies should be trying to help is unconscionable. Many families are unemployed due to the COVID pandemic and cannot afford to spend valuable resources on an app at this time. Be part of the solution, not the problem at this difficult time. Shame on you! This app was free until just a few days ago. During this COVID crisis, most eye care providers are resorting to telemedicine to monitor patients who need to be followed. This app is useful for visual acuity testing, especially in children, since it includes the Lea and HOTV charts and could be very helpful in the setting of telemedicine. It had been a free app until just a few days ago, when all of a sudden, in the midst of the COVID-19 pandemic, a $4.99 fee was charged. This fee should be removed or at least waived at this time—just as quickly as it was added!
Developer Response
There had been a 1 week promotion during which the purchase price was zero. App Store does NOT allow a free app to become a paid app, and this app has been a paid app. And you may request a refund from App Store.
Better than Snellen chart on paper
WilliamsPiggy
I have been wondering how come the top row of the Snellen chart could be suitable for both 20 feet and 6 meters, as marked in paper base Snellen charts, since 20 feet is 6.096 meters. This app actually gives slightly larger optotype for a 20 feet distance than for a 6 meters distance. The UI design is mobile friendly. The hint is brief, so it took me some fail and try to figure out how to use. After all, intuitive and smooth.
This was free - now it’s not.
A-Aron2020
Update #2: Why are you reporting my concern to Apple support? My issue is NOT about MY purchase experience. My issue is about the many other patients who will need this app in the near future. Give THEM a break. Reduce the price for THEM. HELP THEM, not me. ================Update: If it was just a temporary 1 week free trial, why not extend that for several more weeks to help people out? Or maybe reduce the price to $0.99? Seems like that would be reasonable if you are restricted from changing it to free. ================Hundreds of patients will now suffer as they can’t afford spending money on a single visual acuity check. Shame on the developer for taking advantage of the disadvantaged. Hold down on the comment and like it so it rises to the top of most helpful. Time to look for another option.
Developer Response
There had been a 1 week promotion during which the purchase price was zero. App Store does NOT allow a free app to become a paid app, and this app has been a paid app. And you may request a refund from App Store.
1. Support iPhone 17e, iPad Air (11-inch), iPad Pro (13-inch).
2. Target iOS 26.2.
Version 3.5.1
The developer, zijian huang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
