Cortex Brain TrainerCortex Brain Trainer
Sharpen your mind, one rep at a time.
Seventeen brain games, skill drills and classic puzzles in one calm, private app. Plus Peak Hours, which reveals when your mind is sharpest. Pay once, and nothing ever leaves your device.
Free for 3 days, then €3.99 once. No subscription, ever.
Everything it needs.
Nothing it doesn't.
The breadth of a real brain trainer, the calm of a focused tool, and Peak Hours you will not find anywhere else.
Find when your mind is sharpest
A quick reaction check, any time of day. Over time it charts your sharpest hours, all on your device.
Memory, focus, reading and logic
N-Back, Stroop, Schulte, Speed Reader and more, each built around a real task, not a gimmick.
Learn a trick, then drill it
Mental Math teaches a real shortcut, then lets you practise until it is second nature.
A closer look
See it in action
Private by design. Yours for good.
No accounts, no analytics, no cloud that isn't yours. Just games, and your own progress.
Nothing leaves your device
No account, no ads, no third-party trackers. Your scores and streaks stay on your phone.
One calm payment
Every game is free for 3 days, then a single purchase unlocks everything. No subscription, ever.
Sharpen your mind, one rep at a time.
Free for 3 days, then €3.99 once. No subscription, ever.
Specifications
- Price
- €3.99 once
- Trial
- 3 days free
- Platforms
- iOS · Android
- Languages
- EN · NL · DE · FR · ES · IT · PT · SV · NB
- Category
- Games
Questions
Is Cortex a subscription?
No. Every game is free for 3 days, then a single one-time purchase unlocks everything for good. No subscription, no ads, no recurring charges.
What is Peak Hours?
A quick reaction check you can take any time of day. Over time it charts when your mind is sharpest, whether you are a morning lark, a night owl, or steady all day. It stays on your device.
Does Cortex work offline?
Yes. Everything runs on your device with no account and no connection. Your bests, streaks and settings are stored locally.
What data does Cortex collect?
None. No account, no analytics, no third-party trackers. If your device backs up to iCloud or Google, that backup is yours and controlled by you.
Which files can the Speed Reader import?
TXT, PDF, DOCX and EPUB. Imported files are read and processed entirely on your device and are never uploaded.
Are Sudoku and Word Search brain training?
No. They are included as classic puzzles for enjoyment, not as cognitive training.
How do you keep your brain sharp?
Short, varied, and daily beats long and occasional. A few minutes of different challenges, memory, attention, reflexes, mental math, keeps more of your mind engaged than repeating one puzzle. Cortex packs seventeen games and skill drills into calm daily sessions, and Peak Hours shows you when your mind is sharpest, all on your device with no subscription.
Do brain training apps actually work?
They will not raise your IQ, and any honest app should say so. What they do well is build a daily habit of focus and quick thinking, and make the practice enjoyable enough that you keep it up. Cortex is built around that: varied, genuinely fun sessions you finish, one-time purchase, nothing tracked.
How can I improve my focus and memory?
Train little and often, mix the type of challenge, and remove friction so you actually show up. Working-memory drills like n-back, attention tasks like Schulte tables, and quick mental math all help when done as a short daily ritual. Cortex bundles those into one calm app: pay once, no account, works offline.
