# Vision Toolbox vs K

The clearest difference is price: K at Free against Vision Toolbox's $59.99. K also leads on rating (5.0 vs 1.0) and device support (3 vs 1). Vision Toolbox's advantage is in-app purchases (none vs 1). On ratings volume, update cadence and ads there is nothing between them.

K is free to download; Vision Toolbox costs $59.99 up front. K sells 1 in-app purchase, starting at $51.99 per year. Vision Toolbox 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.

Vision Toolbox ships an update every 34 months, K every 32 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Vision Toolbox | K |
| --- | --- | --- |
| Price | $59.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/vision-toolbox/id435675708/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/k-d-color-contrast-sensitivity/id1530827184/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 32 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 579 MB | 64 MB |
| Requires iOS | 15.6 | **8.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Potters Bar Eye Care Limited](https://appshunter.io/developer/314208688) | [King-Devick Test, LLC](https://appshunter.io/developer/424793545) |

## What reviewers say

### Vision Toolbox

[App page](https://appshunter.io/ios/app/vision-toolbox/id435675708)

This application provides eye care professionals with over 500 digital test screens and images for vision assessment and screening. It offers a comprehensive suite of tools for near vision, distance vision, patient education, and dispensing, all accessible on an iPad.

**Highlights:** Over 500 test screens and images, Near vision assessment tools, 3-meter distance vision assessment, Patient education images and videos, Digital dispensing tools, On-screen rulers and protractors, Eye-related calculation toolkit

**Features:** macOS Compatibility

**In-app purchases:** none


### K

[App page](https://appshunter.io/ios/app/k-d-color-contrast-sensitivity/id1530827184)

This application helps clinicians monitor and track the progression of Age-Related Macular Degeneration (AMD). It can be used by patients for home screening, with results remotely monitored by clinical staff. Early detection of wet AMD is crucial for timely treatment.

**Highlights:** Monitor AMD progression, Track dry to wet AMD, Home screening tool, Remote monitoring by clinicians, Early detection of wet AMD

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $51.99 | per year |


## Frequently asked questions

### Is Vision Toolbox free?

Vision Toolbox costs $59.99, with no in-app purchases.

### Is K free?

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

### Which has better reviews, Vision Toolbox or K?

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

### Do Vision Toolbox or K have ads?

Neither Vision Toolbox nor K shows ads.

### Which is updated more often, Vision Toolbox or K?

Vision Toolbox ships an update every 34 months, and K every 32 months. Most recently, Vision Toolbox was updated on November 1, 2026 and K on November 3, 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.*