Calculate VA vs Vision
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculate VA
Instantly convert between common visual acuity measurements. This tool is designed for eye care professionals needing to fluidly switch between Snellen, Decimal, logMAR, and ETDRS Letter formats. Get accurate conversions with a single tap.
- Instant visual acuity conversions
- Supports Snellen 20/20
- Supports Snellen 6/6
- Supports Decimal
- Supports logMAR
- Supports ETDRS Letters
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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.
Vision
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This application, thanks to the iPad, works as an IOL simulator based on the type of IOL that is selected. The doctor will set the parameters of the patient’s pathology and, thanks to the iPad CAMERA, he will be able to see the surrounding environment through the IOL type that is selected by the patient/surgeon. This app requires LiDAR Scanner on iPad.
Screenshots
Verdict
The clearest difference is update cadence: Vision at every 5 weeks against Calculate VA's every 12 months. On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Calculate VA ships an update every 12 months, Vision every 5 weeks. The most recent releases landed on September 17, 2026 and September 16, 2026 respectively.
| Parameter | Calculate VA | Vision |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 12 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad — better | iPad |
| Requires iOS | 16.6 | 15.5 — better |
| Further details — not scored | ||
| Size | 1 MB | 262 MB |
| Age rating | 12+ | 12+ |
| Developer | David Kramer | SBM Sistemi s.r.l. |
In-app purchases
Calculate VA
No in-app purchases
Vision
No in-app purchases
