Comparison

Worth 4 Dot vs Sharp Chart 2020 LogMAR Chart

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Worth 4 Dot

Features
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Worth 4 Dot: Suppression Test Features: - Adjustable dot size - Adjustable dot separation - Ability to alter contrast of individual dots - Ability to alter colour properties to correctly match red/green anaglyph filters. - Calculates angular subtense based on chosen working distance

About

Sharp Chart 2020 LogMAR Chart

This app projects a visual acuity chart onto a large screen for eye examinations. It offers various optotypes and visual acuity nomenclatures, with advanced features and additional charts available through in-app purchases. It can also be controlled via voice commands and integrated with smart home lighting.

Highlights
  • Projected letter chart via AirPlay
  • Multiple optotypes and visual acuity nomenclatures
  • Customizable charts with imported images/videos
  • Dark Mode for consulting rooms
  • Siri voice control
  • HomeKit lighting integration
Features
Read full description

A letter chart app designed to be used via AirPlay to a large screen (TV or computer monitor). Use either an Apple TV connected to a TV, a cable, or use a TV with built-int AirPlay such as the latest Samsung or LG. And now you can also run the app directly on an Apple TV, without the need for an iPhone or iPad! Has everything you'd expect, including multiple optotypes (sloan, illiterate E, landolt C, pictorial, international sloan) and multiple Visual Acuity nomenclatures (metric, imperial, decimal and logMAR). The basic letter chart is free. Larger letters, further optotypes, other charts require an in-app purchase. The charts you'd expect are all here: - cross-cylinder charts - binocular vision such as a 4-dot test - duochrome - confusion lines around single letters or a single row - low contrast - single line, both horizontal and vertical - and more You can even import your own images and videos to create your own chart. Configure a chart then save it as a shortcut with a simple drag-and-drop operation. Use Dark Mode for a dark consulting room. Great for mobile workers, keep your chart on your iPhone and just take an Apple TV to connect to a television at your destination. Use HomeKit lights in your consulting room? Have them switch automatically as you change charts! Want to use Siri to control your charts by voice? Now you can! Our Terms of Use can be found at this link: https://www.ausoptom.com/sharpchart/terms.html

Screenshots

Worth 4 Dot2 screens
Sharp Chart 2020 LogMAR Chart1 screens

Verdict

The call

The clearest difference is in-app purchases: Worth 4 Dot at none against Sharp Chart 2020 LogMAR Chart's 4. Worth 4 Dot also leads on iOS requirement (12.2 vs 15.6). Sharp Chart 2020 LogMAR Chart's advantage is update cadence (every 3 months vs every 8 months). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sharp Chart 2020 LogMAR Chart sells 4 in-app purchases, starting at $1.99 per 7 days. Worth 4 Dot asks for nothing beyond the download.

UpkeepUpdate frequency

Worth 4 Dot ships an update every 8 months, Sharp Chart 2020 LogMAR Chart every 3 months. The most recent releases landed on September 26, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
Worth 4 Dot versus Sharp Chart 2020 LogMAR Chart: the parameters behind the verdict, then further details
ParameterWorth 4 DotSharp Chart 2020 LogMAR Chart
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 8 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple TV — better
Requires iOS12.2 — better15.6
Further details — not scored
Size4 MB23 MB
Age rating4+4+
DeveloperNeovix, Inc.Optical Directions Consulting

In-app purchases

None

Worth 4 Dot

No in-app purchases

4 purchases

Sharp Chart 2020 LogMAR Chart

Subscriptions3
  • Access All Areas$1.997 Days
  • Access All Areas3 Days trial$3.991 Month
  • Access All Areas1 Month trial$22.491 Year
One-time1
  • Access All Areas$94.99

Questions

Is Worth 4 Dot free?
Worth 4 Dot is free to download, with no in-app purchases.
Is Sharp Chart 2020 LogMAR Chart free?
Sharp Chart 2020 LogMAR Chart is free to download, with in-app purchases available.
Do Worth 4 Dot or Sharp Chart 2020 LogMAR Chart have ads?
Neither Worth 4 Dot nor Sharp Chart 2020 LogMAR Chart shows ads.
Which is updated more often, Worth 4 Dot or Sharp Chart 2020 LogMAR Chart?
Worth 4 Dot ships an update every 8 months, and Sharp Chart 2020 LogMAR Chart every 3 months. Most recently, Worth 4 Dot was updated on September 26, 2026 and Sharp Chart 2020 LogMAR Chart on September 30, 2026.

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