A
C
?
3
F
B
D
?
Pair Hunt
Two grids at once — one letter gone, one digit gone. Split your attention and keep both halves sharp.
Neuron Burst
Something is missing. Find it.
Short drills for attention, working memory and reaction speed. A round takes seconds. Every score stays on your device.
Coming to the App Store
Try a round1–9
Which digit is missing?
What you get
P
Letter Hunt
A letter flashes in one cell, then everything empties. Put it back where it was — the right letter in the right square.
3
7
1
5
?
9
2
8
6
Nr Hunt
Nine cells, one digit missing, the clock running. The simplest one to explain and the hardest to beat your own time on.
What it doesn't do
✓
No data collectedNo account, no sign-in, no analytics, no trackers. Your times are written to your device and stay there.
✓
Nothing sent over the networkThe games run fully offline. Nothing about how you play is uploaded, watched or shared.
✓
No in-app purchases, no adsYou buy the app once. Nothing is locked, nothing nags you, no advertising ever appears.
✓
Safe for children, useful at any ageNo chat, no links to strangers, nothing to stumble into. From 3 to 133 — the exercises work the same at every age.
Full details in the privacy policy.