BrainTrain — free brain-training games

BrainTrain is a two-minute cognitive warm-up before real work: Number Memory, Sequence Recall and Speed Maths, each with difficulty that climbs automatically until you miss — so the session always sits at the edge of your ability. The Full Gauntlet cycles all three.

After every session you get an analytics summary, and one click turns it into a PDF report (generated in your browser with jsPDF — nothing is uploaded). Streaks and best scores live in your browser's own storage.

Technology: single-file HTML5 + CSS3 + vanilla JavaScript, jsPDF from CDN for the report, localStorage for stats. No server, no login, no tracking.

Apps like this — small, focused, genuinely useful — are a standard crew build. If your organisation wants its own training game, calculator or micro-tool, ask for a free quote.

What it does

• Number Memory — recall digits as they grow from 3 to 15+
• Sequence Recall — alphanumeric sequences that mix and lengthen
• Speed Math — timed four-option arithmetic under pressure
• Full Gauntlet — all three modes cycle in one session
• Session report as a downloadable PDF, plus saved streaks and scores

Want one like this of your own?

Every free app in this store doubles as a working sample of what the crew builds for clients: practice tools, calculators, trackers, training games. Small scope, one fast file, no logins and no tracking. If your school, clinic, warehouse or studio needs its own version, this is a standard crew job.

Get a free quote for your app ideaSee client work