Comparison

K vs Easy DEM

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

Head to head
About

K

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
Read full description

The King-Devick Test involves reading aloud a series of single digit numbers from left to right on three test cards. Performance is based on speed and accuracy and results are instantly compared to age-related normative data for subjects 6-14+ years old. Testing administrators can quickly identify subjects that may be prime candidates for the King-Devick Reading Acceleration Program as an effective intervention. -Reliable: K-D Test has been extensively researched and validated by peer-reviewed studies -Quick: K-D Test Pro Reading can be easily administered in two minutes or less -Objective: Performance immediately compared to age-related normative data for subjects 6-14+ years old This app is intended ONLY for professional users with an existing K-D Test Pro Reading account.

About

Easy DEM

This application assists in administering and scoring the DEM Test, designed for use with official Bernell materials. It offers patient management, test timing, and video recording capabilities for detailed analysis. Data is stored offline for enhanced privacy.

Highlights
  • Patient management
  • Test timing and administration
  • Manual test entry
  • Clinical diagnostic indication display
  • Video recording of examinations
  • Biometric locking (FaceID/TouchID)
Features
Read full description

Important: Please note that this application is designed to be used exclusively with the official DEM Test materials from Bernell. The use of photocopies or unauthorized versions of the test materials is strictly prohibited and constitutes a copyright violation. For accurate and compliant results, we encourage you to acquire the original materials from Bernell. Easy DEM facilitates taking the DEM Test by providing a comprehensive tool for administration and scoring. - Patient management: find all your tests for a patient in one place - Timing and administration of vertical and horizontal tests - Option to manually enter tests conducted outside the application - Display of clinical diagnostic indication (Type I, II, III, IV) when results are significant - French and English dataset, for ages 6 to 13 - Video recording: record the patient during the examination and review the exam later to refine your diagnosis - Biometric locking: secure access to the application with FaceId or TouchId All data is saved 100% offline, ensuring complete confidentiality of health data. The Easy DEM application is a tool for administration, calculation, and visualization; Easy DEM is not a diagnostic tool. Its use does not replace the official materials of Bernell, the owner of the DEM test paper supports.

Screenshots

Easy DEM4 screens

Verdict

The call

The clearest difference is price: K at Free against Easy DEM's $24.99. K also leads on iOS requirement (8.0 vs 17.6). Easy DEM's advantage is update cadence (weekly vs every 14 months). On ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

K is free to download; Easy DEM costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

K ships an update every 14 months, Easy DEM weekly. The most recent releases landed on June 26, 2026 and September 16, 2026 respectively.

Scorecard4 real differences · 6 level
K versus Easy DEM: the parameters behind the verdict, then further details
ParameterKEasy DEM
PriceFree — better$24.99
Rating5.0 (1 ratings) — better—
Positive reviews—100.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 14 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPadiPhone, iPad — better
Requires iOS8.0 — better17.6
Further details — not scored
Size57 MB5 MB
Age rating12+17+
DeveloperKing-Devick Test LLCDokitek

Customer experience

K

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Easy DEM

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

K

No in-app purchases

None

Easy DEM

No in-app purchases

Questions

Is K free?
K is free to download, with no in-app purchases.
Is Easy DEM free?
Easy DEM costs $24.99, with no in-app purchases.
Do K or Easy DEM have ads?
Neither K nor Easy DEM shows ads.
Which is updated more often, K or Easy DEM?
K ships an update every 14 months, and Easy DEM weekly. Most recently, K was updated on June 26, 2026 and Easy DEM on September 16, 2026.

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