21 Veintiuno

Learn to play blackjack properly

Veintiuno is an iPhone app that teaches basic strategy hand by hand, with a 14-day path, exams and a consultant that solves any hand.

What it is, and what it isn't

It is an educational tool. No real money is involved, there are no chips and no wagers, and it has no connection to any casino or betting operator.

Using an electronic device at a live blackjack table is forbidden by casinos and illegal in many jurisdictions. Veintiuno is built for studying at home, not for taking to a table.

What's inside

A practice table that corrects you on every decision.
A 14-day path: one concept, one drill and one exam per day.
Strategy charts for different rule sets (S17/H17, DAS, surrender, with and without a hole card).
Hi-Lo counting explained honestly: what it is, what it is really worth, and where it doesn't work.
A hand consultant with the expected value of every option.
Ten languages, careful sound and haptics.

Veintiuno Pro

The first three days of the path are free. Veintiuno Pro unlocks the remaining eleven lessons, the hand consultant and the mistake heat map. Pricing and renewal details are in the terms.

Responsible play

If gambling has stopped being fun, ask for help. In Spain: 900 200 225 (free, confidential helpline). Elsewhere, look for your country's public service.