# K vs Chart2020 Lite

The clearest difference is rating: K at 5.0 against Chart2020 Lite's 1.0. K also leads on in-app purchases (none vs 4) and iOS requirement (8.0 vs 12.0). Chart2020 Lite's advantage is update cadence (every 3 months vs every 14 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Chart2020 Lite sells 4 in-app purchases, starting at $7.99 per 7 days. K asks for nothing beyond the download.

K holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

K ships an update every 14 months, Chart2020 Lite every 3 months. The most recent releases landed on September 30, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | K | Chart2020 Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/k-d-test-pro-reading/id1068456746/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/chart2020-lite/id1364522406/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 3 months** |
| Monetization | **Free** | Subscription |
| Size | 57 MB | 58 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPad | iPad |
| Age rating | 12+ | 4+ |
| Developer | [King-Devick Test, LLC](https://appshunter.io/developer/424793545) | [Shemesh Health Solutions PTY Ltd](https://appshunter.io/developer/578849338) |

## What reviewers say

### K

[App page](https://appshunter.io/ios/app/k-d-test-pro-reading/id1068456746)

This application facilitates the administration of a rapid eye movement test for reading assessment. It compares performance against age-related norms for individuals aged 6-14+, helping to identify potential candidates for reading intervention programs.

**Highlights:** Reads numbers from test cards, Measures speed and accuracy, Compares results to age norms, Identifies candidates for intervention, Administered in under two minutes, Validated by peer-reviewed studies

**Features:** macOS Compatibility

**In-app purchases:** none


### Chart2020 Lite

[App page](https://appshunter.io/ios/app/chart2020-lite/id1364522406)

This app provides a digital eye chart with various testing options, including different chart types and masking features. It offers remote control capabilities via a companion iPhone app or an optional Bluetooth remote, making it suitable for professional and home use.

**Highlights:** Multiple chart types (Sloan/Snellen, Balancing, Astigmatism), Customizable testing distance, Variety of letter/number/symbol sets, Masking and randomization options, Companion iPhone app for remote control, Optional Bluetooth remote control

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $7.99 | per 7 days |
| Weekly Subscription | $7.99 | per 7 days |
| Monthly Subscription | $19.99 | per month |
| Yearly Subscription | $149.99 | per year |


## Frequently asked questions

### Is K free?

K is free to download, with no in-app purchases.

### Is Chart2020 Lite free?

Chart2020 Lite is free to download, with in-app purchases available.

### Which has better reviews, K or Chart2020 Lite?

K is rated higher. K averages 5.0 out of 5 from 1 ratings, while Chart2020 Lite averages 1.0 from 1 ratings.

### Do K or Chart2020 Lite have ads?

Neither K nor Chart2020 Lite shows ads.

### Which is updated more often, K or Chart2020 Lite?

K ships an update every 14 months, and Chart2020 Lite every 3 months. Most recently, K was updated on September 30, 2026 and Chart2020 Lite on October 14, 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.*