K vs PL Fest
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
PL Fest
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Cognitive testing at home, with PL Fest Brought to you by the UCR Brain Game Center.
Screenshots
Verdict
The clearest difference is iOS requirement: K at 8.0 against PL Fest's 15.0. On price, update cadence 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
K ships an update every 14 months, PL Fest every 28 months. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.
| Parameter | K | PL Fest |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 14 months — better | Every 28 months |
| Ads | No | — |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPad — better | — |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 57 MB | 132 MB |
| Age rating | 12+ | 4+ |
| Developer | King-Devick Test, LLC | Northeastern University Information Services |
In-app purchases
K
No in-app purchases
PL Fest
No in-app purchases
