BrainBenchmarks was created to provide high-precision, accessible, and scientifically grounded cognitive assessment telemetry.
We build for local-first privacy, sub-millisecond paint sync alignment, and complete research transparency. We explicitly reject intrusive ads that trigger layout shifts (CLS) to preserve timing accuracy and provide professional-grade performance logs.
Our cognitive measurement models map standard psychological frameworks (such as Hick's Law for choice reaction and Miller's Law for working memory span capacity). All demographic percentile curves are derived from peer-reviewed cognitive science datasets.
We believe you own your cognitive data. Your performance logs are stored securely in your browser's local cache (IndexedDB). No personal metrics are uploaded to cloud servers unless you explicitly configure the optional edge-sync backup engine.