Ten right in a row lights up DEKKA. One wrong answer and the streak is gone.
Range
Answers under a hundred. Times tables and small sums.
Operations
Round
Add DEKKA to your home screen.
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First place
0 correct
Enter your name — up to five letters.
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Week of Aug 17
0 correct
Same seven puzzles for everyone. One scored try each.
New here? Tap today. There's no submit button — the answer sends itself.
Sends a text with your score and a link. They get the same puzzle — see if they can beat you.
Agora
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Your rhythm
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Versus
Same code, same problems.
A one-time race. Set the tier, share the code — everyone who enters plays the identical round. No leaderboard, no history. Just a fair fight.
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Type a code to see what it opens.
Create
Builds a code from your Practice settings.
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Stats
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Answer speed
—avg per answer
—fastest ever
—speed change
Avg answer speed · last 30 daily rounds
Performance by tier
Miss rate by operation
Records
—best daily score
—best streak
—tier
Score trend
Daily scores · last 30 rounds
Score trends by tier
TierLast 8 weeksAvg
Streak efficiency
—in a streak ≥5
—best hour
Consistency
Days played per week · last 8 weeks
A short analysis written from your numbers.
About
Made for Julian.
Built by his dad over a handful of evenings in 2026, after a Nintendo DS game called Brain Age. Julian was heading into seventh grade and needed his math facts to become automatic.
Will Wallace has spent twenty-five years in public education — math teacher, counselor, and now a high school assistant principal on California's Central Coast.
Why it works
askesis — ἄσκησις — training
Euclid didn't discover geometry. He put it in order, one proposition at a time.
Practice on some app won't make you smarter. It can help make the facts automatic — so your mind is free for the hard parts, when the hard parts come.
Ten in a row is a DEKKA.
The words
DEKKAδέκαten — ten right in a row
HEKTOἑκατόνhundred
KILOχίλιοιthousand
KENONκενόνthe void — the gap in the equation
KAIROSκαιρόςthe decisive moment
SEIRAσειράa cord, a chain
EUREKAεὕρηκαI have found it — Archimedes
LOGOSλόγοςreason — and, in Euclid, ratio
ASKESISἄσκησιςtraining, practice, discipline
No accounts, no ads. Daily scores are stored anonymously — name, score, and date only — to power the Agora leaderboard. Practice scores stay on this phone only.