# checkbase: Cognitive Baseline — Test focus & reaction time

> Test focus & reaction time (iPhone/iPad app by Artjoms Sevcenko.)

- Source: https://appshunter.io/ios/app/checkbase-cognitive-baseline/id6768623609 (this page in markdown: same URL + `.md`)
- Developer: [Artjoms Sevcenko](https://appshunter.io/developer/1896590726)
- Category: Lifestyle, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.4 · 5 MB
- Languages: American English
- Released: 2026-06-08
- Data updated: 2026-09-29
- User reviews in markdown: https://appshunter.io/ios/app/checkbase-cognitive-baseline/id6768623609/reviews.md

## What is checkbase?

checkbase is a premium cognitive benchmarking utility designed to test your mental sharpness, focus, and reaction performance through a series of rapid-fire mini-games. Whether you are analyzing end-of-day mental fatigue, or challenging your baseline reflexes, checkbase provides instant insight into your current cognitive state.

MODES FOR EVERY MOMENT 
• Fatigue Tracker: Track your daily mental stamina. Are you at peak readiness, or experiencing a slight delay? 
• Social Mode: A high-energy experience designed to track your delay in a more entertaining way. 

DYNAMIC MINI-GAMES: Challenge your focus with a rotating battery of tasks.

YOUR COGNITIVE VERDICT
After completing a circuit, checkbase compares your performance against your established baseline. Instantly see if you are at your "Optimal" peak performance, or if you are showing signs of cognitive drag or reaction delay.

PREMIUM DESIGN & HAPTICS Built natively for iOS, checkbase: Cognitive Baseline utilizes liquid mesh gradients and advanced CoreMotion haptics to deliver a sensory-rich, distraction-free experience.

BUILT FOR YOUR LIFESTYLE
• Detailed performance tracking and insights
• Morning baseline check-ins

Disclaimer: checkbase is designed for entertainment and self-awareness purposes only. It is not a medical device, nor should it be used to diagnose any condition, assess driving safety, or determine your ability to perform hazardous tasks.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Appreciation Tip | $2.99 | one-time |
| Super Supporter Tip | $4.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-06-08

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-29.*