Comparison

Chart2020 Connect vs K

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

Head to head
About

Chart2020 Connect

Features
Read full description

Chart2020® CONNECT is a professional-grade vision testing solution with CONNECT Personalities: 1. iPad optimized profession-grade vision tests; 2. Controller for Chart2020 CHART2020 CONTROLLER PERSONALITY: CONNECT is a controller for Chart2020, the premier visual acuity and ocular performance platform, utilizing gestures and one-touch, hiding “docks” -> Wirelessly, synchronously manages Chart2020 functions -> One-button access to extensive library of tests (no more FUNC / CTRL / F# key combination memorization) -> Provide private views of eye test content / answers (stereo acuity, contrast sensitivity, (e)ETDRS) -> Adds patient entry fields with iPad simplicity to add and manage patients for “Wizard-driven” tests, test administration, and reports management -> Live view of patient monitor -> Intuitive icons used across both platforms -> Intuitive gestures for acuity chart “Intelligent” letter randomization, multiple types of masking / isolation / crowding, as wells as navigation through your test sequences -> Display of distance media (images, movies, education, marketing) -> Synchronous drag and drop of test sequence tests -> Use in multiple exam rooms with unique identities -> Selective display of rich variety of LogMAR, Sloan compliant optotypes (Tumbling E and C, Low vision, HOTV, Sloan Numbers, Japanese, Korean, Arabic, Russian, Hebrew, Greek)

About

K

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
Read full description

King-Devick Variable Color Contrast Sensitivity Chart is an iPad/iPhone-based product application that allows clinicians to monitor and track the progression of Age-Related Macular Degeneration (AMD) from non-exudative (dry) AMD to exudative (wet) AMD. It is critical to know when exudative (wet) AMD begins to occur so the treatment with a-VEGF injections can begin. King-Devick Variable Color Contrast Sensitivity Chart has been proven to be a helpful tool in detecting progression of disease in Age-Related Macular Degeneration. King-Devick Variable Contrast Sensitivity Chart can be used by the patient as a simple home-screening tool monitored by clinician’s staff remotely or in-office screening. Our Terms of Use are available here https://kingdevicktest.com/terms-of-service/

Screenshots

K1 screens

Verdict

The call

The clearest difference is update cadence: Chart2020 Connect at fortnightly against K's every 32 months. K's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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. Chart2020 Connect sells 4 one-off in-app purchases and K sells 1 in-app purchase, starting at $51.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Chart2020 Connect ships an update fortnightly, K every 32 months. The most recent releases landed on October 26, 2026 and November 3, 2026 respectively.

Scorecard2 real differences · 7 level
Chart2020 Connect versus K: the parameters behind the verdict, then further details
ParameterChart2020 ConnectK
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyFortnightly — betterEvery 32 months
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPadiPhone, iPad, iPod — better
Requires iOS8.08.0
Further details — not scored
Size62 MB64 MB
Age rating4+12+
DeveloperShemesh Health Solutions PTY LtdKing-Devick Test, LLC

In-app purchases

4 purchases

Chart2020 Connect

One-time4
  • 10 emails$9.99
  • 25 emails$21.99
  • 50 emails$44.99
Show 1 more
  • 100 emails$84.99
1 purchases

K

Subscriptions1
  • Annual Subscription$51.991 Year

Questions

Is Chart2020 Connect free?
Chart2020 Connect is free to download, with in-app purchases available.
Is K free?
K is free to download, with in-app purchases available.
Do Chart2020 Connect or K have ads?
Neither Chart2020 Connect nor K shows ads.
Which is updated more often, Chart2020 Connect or K?
Chart2020 Connect ships an update fortnightly, and K every 32 months. Most recently, Chart2020 Connect was updated on October 26, 2026 and K on November 3, 2026.

Other comparisons