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[iOS] Free: Visual Acuity Charts 4+ (Was $7.99) @ Apple App Store


This is what posted in Apple App Store if you are using iPhone or iPad the check the app.
"The 42-42 Promotion is being held from 2020-04-02 to 2020-05-13 lasting for 42 days. After 13th May the price is back to US$4.99. The free installation is permanent."

App Description:
Prevention is better than cure. Designed for children older than 6, parents with young children, and general practitioners, this app displays optically precise optotypes of eye charts for you to measure distant visual acuity accurately in order to detect nearsightedness or myopia early, so you can take preventive measures and seek help from medical professional early to prevent pseudomyopia from becoming myopia, or prevent nearsightedness from getting worse.

Supported Eye Charts:
1. Snellen Chart, with C, D, E, F, H, K, N, P, R, U V and Z, as defined in BS 4274-1:2003
2. Tumbling E Chart. Option to have shorter middle arm.
3. Landolt C Chart
4. ETDRS Chart, with C, D, H, K, N, O, R, S, V, and Z
5. HOTV Chart
6. ETDRS European-wide Chart, with H, K, O, E, P, X, B, T, M and A
7. Numbers

Predefined Test Distances:
* 6, 5, 4, 3, and 2 meters
* 20, 15, 12, 10, 6 feet

Testing for myopia takes several procedures and the first step is often to check distant visual acuity through a visual acuity chart. And the decrement of visual acuity may indicate the development of myopia.

While this app may replace eye charts in print, however it cannot replace doctors and optometrists who carry out comprehensive tests for your eyes. Please visit optometrists regularly and seek help from medical professional at early signs of visual acuity problems.

Related Stores

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closed Comments




  • +3 votes

    42, the Answer to the Ultimate Question of Life, the Universe, and Everything. :)

  • +1 vote

    Look like a good tool for MBS Telehealth Services. These days many children and teens stay at indoor longer because of the covid-19 pandemic unfortunately, so they risk more of getting myopia.


    I have zero use for this. But I got it anyway!

  • +2 votes

    Hello, your friendly optometrist here. Please use this only as a screening tool and not to monitor deterioration. Children are highly unreliable with their responses and their vision is worth more than a phone app. If you are particularly concerned, contact your optometrist and most will allow an urgent appointment even during this pandemic. Stay safe Australia


      Indeed. However, myopia seems to be the major consequence of using iPad since children often stare at iPad at close distance. Surely excessive brightness and bluglight may cause other eye problems.


    This app had got some sudden jump of poor review and low rating a few weeks ago, apparently many people had thought this app had been free and then became a paid app during the COVID-19 pandemic. There had been a one week promotion starting 17th March, and after the promotion end, some people somehow had become angry. I guess this is probably due to that the App Store does not show the original price of an app on free promotion, while Google Play shows the original price with a strike.

    Anyway, I just gave it a 5-star.


    APparentl;y IA already has this app fromberfory. I never used it

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