# Calculate VA — Calculator for Visual Acuity

> Visual acuity calculator for optometrists and ophthalmologists. (iPhone/iPad app by David Kramer.)

- Source: https://appshunter.io/ios/app/calculate-va/id1425990457 (this page in markdown: same URL + `.md`)
- Developer: [David Kramer](https://appshunter.io/developer/1425990456)
- Category: Medical, Utilities
- Price: Free
- Rating: 5.00/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 12+
- Requires: iOS 16.6 · 1 MB
- Languages: American English
- Released: 2018-08-19
- Data updated: 2026-06-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/calculate-va/id1425990457/reviews.md

## What is Calculate VA?

Calculate VA gives you a quick and accurate way to easily convert between common measures of visual acuity. Conversions are made instantly when you enter one of the visual acuity measurements and press "Calculate". Choose from:

* Snellen 20
* Snellen 6
* Decimal
* logMAR
* ETDRS Letters

This is useful for any optometrist or ophthalmologist who needs to convert fluidly between all 5 of the common visual acuity measures.

## Key features

- Instant visual acuity conversions
- Supports Snellen 20/20
- Supports Snellen 6/6
- Supports Decimal
- Supports logMAR
- Supports ETDRS Letters

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/calculate-va/id1425990457/reviews.md

### 5/5 — Great Resource!

*2018-08-20*

This is a great resource!  Very well done and the price is right!

**Developer response:** Thanks for the positive feedback!

## Frequently asked questions about Calculate VA

### What visual acuity formats does Calculate VA support?

Calculate VA supports conversions between Snellen 20/20, Snellen 6/6, Decimal, logMAR, and ETDRS Letters. This comprehensive range ensures you can work with all common measures.

### Is Calculate VA free to use?

Yes, Calculate VA is completely free to download and use. There are no hidden costs or in-app purchases required.

### Does Calculate VA have ads?

No, Calculate VA is ad-free. You can perform your calculations without any interruptions from advertisements.

### What devices is Calculate VA available on?

Calculate VA is available for both iPhone and iPad. This allows eye care professionals to use it on their preferred Apple devices.

### How often is Calculate VA updated?

The latest version, 3.1, was last updated on December 2, 2025. This indicates ongoing support and potential for future improvements.

### What is the age rating for Calculate VA?

Calculate VA has an age rating of 12+. This means it is suitable for users aged 12 and older.

### How accurate are the conversions in Calculate VA?

The app is designed to provide quick and accurate conversions between common visual acuity measures. Users have rated it highly, with an average of 5.0 stars from 3 ratings.

### Who developed Calculate VA?

Calculate VA was developed by David Kramer. The app was first released on August 19, 2018.

## Version history (last 5 releases)

### 3.1 — 2025-12-02

App has been updated to a fresher interface, with easier to use inputs. App will also now remember your inputs from last session.  NEW Dark Mode support in version 3.1

### 3 — 2025-11-29

App has been updated to a fresher interface, with easier to use inputs. App will also now remember your inputs from last session.

### 2.5 — 2022-04-28

Fixed fatal error which happened when pressing Calculate before entering in any data.

### 2.2 — 2020-07-27

Updated to allow for a comma to be used to separate the integral part of a number from the decimal part, as is common in European countries.

### 2.1 — 2020-04-22

User interface has been modernized utilizing SwiftUI.  Requires iOS 13 or higher.

## Apps similar to Calculate VA

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Control LITE](https://appshunter.io/ios/app/control-lite/id1361955533) | — | Free | Medical |
| [Slit Lamp Camera](https://appshunter.io/ios/app/slit-lamp-camera/id6736861390) | 5.0 (1) | $1.99 | Medical |
| [eETDRS Visual Acuity Test](https://appshunter.io/ios/app/eetdrs-visual-acuity-test/id1551492695) | — | Free | Medical |
| [HOTV Visual Acuity Test](https://appshunter.io/ios/app/hotv-visual-acuity-test/id1551492109) | — | Free | Medical |
| [IOL Reference](https://appshunter.io/ios/app/iol-reference/id1626671895) | 4.7 (15) | Free | Medical |
| [Eye-Check](https://appshunter.io/ios/app/eye-check/id1643416389) | 5.0 (4) | Free | Medical |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*