Comparison

Cerebrum ID vs K

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

Head to head
About

Cerebrum ID

Features
Read full description

The Cerebrum ID app covers normal cerebrum id. The app includes lateral, inferior and superior aspects in both external and internal views, as applicable. External: landmarks, structures, cortices, Brodmann’s, lobes and blood views. Internal: landmarks, structures, cortices, Brodmann’s, limbic and ventricles views. Coronal: section view. Designed to teach cerebrum structure in two ways; touch the parts and see the names highlight or touch the name to see the part highlight. The detailed text is hidden or viewed at the touch of a button. All views include a drawing whiteboard feature for easy anointment, screen prints direct to Photos app to save, email out or print. • External ID: landmarks, structures, cortices, Brodmann’s, lobes and blood views. • Internal ID: landmarks, structures, cortices, Brodmann’s, limbic and ventricles views. • Coronal ID: section view. • Two finger pan and zoom of all views. • Drawing Whiteboard feature:  ◊ Drawing: freeform lines in red, blue, green or black hue.  ◊ Draw and place text directly on all views.  ◊ Text: 36pt, auto wrap, non-movable in red, blue, green or black hue.  ◊ Eraser: touch and rub lines and text on whiteboard to erase.  ◊ Trash: one tap deletes all whiteboard lines and text.  ◊ Screenshot whiteboard direct to Photos App for easy email out and printing. • iOS 6.0+ required, designed for iPad and iPhone. • Best results on iPad 4th generation/iPhone 5 and newer. The Cerebrum ID app makes learning the cerebrum easy. See the example screen shots. Get the app today!

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.

Screenshots

Cerebrum ID4 screens

Verdict

The call

The clearest difference is price: K at Free against Cerebrum ID's $4.99. K also leads on update cadence (every 14 months vs every 37 months) and iOS requirement (8.0 vs 11.0). Cerebrum ID's advantage is device support (3 vs 1). On ads and in-app purchases 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; Cerebrum ID costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Cerebrum ID ships an update every 37 months, K every 14 months. The most recent releases landed on November 11, 2026 and November 2, 2026 respectively.

Scorecard4 real differences · 5 level
Cerebrum ID versus K: the parameters behind the verdict, then further details
ParameterCerebrum IDK
Price$4.99Free — better
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 37 monthsEvery 14 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS11.08.0 — better
Further details — not scored
Size23 MB57 MB
Age rating4+12+
DeveloperBlue Tree Publishing, Inc.King-Devick Test, LLC

In-app purchases

None

Cerebrum ID

No in-app purchases

None

K

No in-app purchases

Questions

Is Cerebrum ID free?
Cerebrum ID costs $4.99, with no in-app purchases.
Is K free?
K is free to download, with no in-app purchases.
Do Cerebrum ID or K have ads?
Neither Cerebrum ID nor K shows ads.
Which is updated more often, Cerebrum ID or K?
Cerebrum ID ships an update every 37 months, and K every 14 months. Most recently, Cerebrum ID was updated on November 11, 2026 and K on November 2, 2026.

Other comparisons