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.
Worth 4 Dot
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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
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.
- 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
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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
Verdict
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
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.
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.
| Parameter | Worth 4 Dot | Sharp Chart 2020 LogMAR Chart |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 8 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple TV — better |
| Requires iOS | 12.2 — better | 15.6 |
| Further details — not scored | ||
| Size | 4 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Neovix, Inc. | Optical Directions Consulting |
In-app purchases
Worth 4 Dot
No in-app purchases
Sharp Chart 2020 LogMAR Chart
- Access All Areas$1.997 Days
- Access All Areas3 Days trial$3.991 Month
- Access All Areas1 Month trial$22.491 Year
- Access All Areas$94.99





