# DEM Calculator vs Sharp Chart 2020 LogMAR Chart

The clearest difference is review sentiment: Sharp Chart 2020 LogMAR Chart at 100% against DEM Calculator's 40%. Sharp Chart 2020 LogMAR Chart also leads on rating (5.0 vs 1.0). DEM Calculator's advantage is update cadence (monthly vs every 3 months) and iOS requirement (8.0 vs 15.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. DEM Calculator sells 1 one-off in-app purchase and Sharp Chart 2020 LogMAR Chart sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Sharp Chart 2020 LogMAR Chart holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 40% of DEM Calculator's written reviews are positive against 100% of Sharp Chart 2020 LogMAR Chart's.

DEM Calculator ships an update monthly, Sharp Chart 2020 LogMAR Chart every 3 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | DEM Calculator | Sharp Chart 2020 LogMAR Chart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/dem-calculator/id1173363940/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sharp-chart-2020-logmar-chart/id1500513811/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 43 MB | 23 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 12+ | 4+ |
| Developer | [MakeMind](https://appshunter.io/developer/950546232) | [Optical Directions Consulting](https://appshunter.io/developer/309309098) |

## What reviewers say

### DEM Calculator

[App page](https://appshunter.io/ios/app/dem-calculator/id1173363940)

This medical aid assists test administrators in quickly calculating and assessing patient scores for the Developmental Eye Movement Test. It automatically computes number naming speed and eye movement abilities based on age or grade, highlighting at-risk scores.

**Highlights:** Automatic score calculation, Number naming speed assessment, Saccadic eye movement analysis, Age/grade based scoring, Error recording, Risk highlighting

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock grades and ages | $31.99 | one-time |


### Sharp Chart 2020 LogMAR Chart

[App page](https://appshunter.io/ios/app/sharp-chart-2020-logmar-chart/id1500513811)

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:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access All Areas | $1.99 | per 7 days |
| Access All Areas | $3.99 | per month |
| Access All Areas | $22.49 | per year |
| Access All Areas | $94.99 | one-time |


## Frequently asked questions

### Is DEM Calculator free?

DEM Calculator is free to download, with in-app purchases available.

### Is Sharp Chart 2020 LogMAR Chart free?

Sharp Chart 2020 LogMAR Chart is free to download, with in-app purchases available.

### Which has better reviews, DEM Calculator or Sharp Chart 2020 LogMAR Chart?

Sharp Chart 2020 LogMAR Chart is rated higher. DEM Calculator averages 1.0 out of 5 from 2 ratings, while Sharp Chart 2020 LogMAR Chart averages 5.0 from 1 ratings.

### Do DEM Calculator or Sharp Chart 2020 LogMAR Chart have ads?

Neither DEM Calculator nor Sharp Chart 2020 LogMAR Chart shows ads.

### Which is updated more often, DEM Calculator or Sharp Chart 2020 LogMAR Chart?

DEM Calculator ships an update monthly, and Sharp Chart 2020 LogMAR Chart every 3 months. Most recently, DEM Calculator was updated on October 24, 2026 and Sharp Chart 2020 LogMAR Chart on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*