Blackjack Strategy Trainer 21
We build a blackjack trainer, so treat this as a biased-but-transparent guide: we will tell you exactly where a competitor beats us and where we think we win. The goal here is the same one a good trainer has — get you to the right decision, fast — not to crown ourselves.
How we judge a blackjack trainer
Every app below is measured against four things that actually move your results:
- Does it drill your weak spots? Random hands are fine, but the fastest way to improve is to see the hands you get wrong more often than the ones you already know. That is spaced repetition, and most trainers do not do it.
- Does it match the rules you play? Basic strategy is not one chart. It shifts with S17 vs H17 and, in Europe and much of Asia, with No Hole Card (ENHC). A trainer locked to US rules can teach you a play that is wrong at your local table.
- Does it give instant, correct feedback? You should learn the right answer the moment you make a decision, not after a full session.
- What does it cost, and is that cost justified for your goal? Learning basic strategy and learning to count cards are different jobs. Paying for the second when you only need the first is wasted money.
Quick comparison
| Trainer | Price | Platforms | Rule sets | Spaced repetition | Best for |
|---|---|---|---|---|---|
| Blackjack Strategy Trainer 21 | Free (ads) | Android, iOS | S17, H17, ENHC | Yes | Learning basic strategy for free, and European rules |
| Blackjack Apprenticeship | Free + paid | iOS, Android, web | Configurable (US-focused) | Yes | Serious card counting and advantage play |
| BlackjackInfo (Ken Smith) | Free (web) | Web | Configurable (US-focused) | No | A quick, trusted web strategy engine and reference |
| Casino Vérité Blackjack (Verité) | Paid | Windows | Deeply configurable | Drill modes | Old-school counters who want a serious desktop simulator |
| Assorted mobile trainers | Free / paid | iOS, Android | Usually US only | Rare | Casual, occasional practice |
Now the detail — and the honest verdict on each.
1. Blackjack Strategy Trainer 21 — best free trainer, and the one to use for European rules
This is our app, so read the rest of the list to keep us honest. What it does well is narrow and deliberate: it deals random hands, asks for your decision, corrects you instantly, and then tracks the hands you get wrong — below 80% accuracy after at least three attempts — and serves them to you more often. That adaptive weighting (the app calls it spaced repetition) is the difference between recognizing a chart and actually recalling the right play under pressure.
It is also one of the very few trainers, at any price, that supports European No Hole Card (ENHC) alongside S17 and H17. Most trainers assume US rules where the dealer takes a hole card; if you play in Europe or much of Asia, training on the wrong rule set quietly teaches you the wrong doubling and splitting plays against a dealer ace or ten.
Where it falls short: it is a focused basic-strategy trainer — it does not teach card counting, betting spreads or deviations. If your goal is to become an advantage player, this is not the tool for that job. It is free with ads, has no paywall, and is available on both Android and iOS.
Best for: anyone learning or sharpening basic strategy for free, and anyone who plays European ENHC tables.
2. Blackjack Apprenticeship — the most complete, if you are serious about counting
Blackjack Apprenticeship is the best-known name in this space, and deservedly so. Beyond basic strategy it drills card counting, deck estimation, betting correlation and playing deviations, with a large library of training material behind it. For someone genuinely working toward advantage play, it is the most complete option here.
Where it falls short: its free tier covers basic drills, but most of its depth — counting, deviations, the full training path — sits behind a paid plan and is aimed at counters. If you only want to stop making basic-strategy mistakes, much of it is machinery you will not use. It is also US-rules-focused, so European players get less out of it.
Best for: aspiring card counters and advantage players who will use the counting drills.
3. BlackjackInfo — the trusted web reference
BlackjackInfo, long associated with Ken Smith, has been a reference point for players for years. Its strategy engine will generate the correct basic-strategy chart for a given rule set, and its articles are solid. It is a great place to look something up quickly on the web.
Where it falls short: it is a reference and a light web trainer, not an adaptive practice app — there is no spaced repetition to grind your weak hands, and it nudges you toward its own products. Use it to check a play, not to drill one.
Best for: a fast, credible web lookup and a configurable chart.
4. Casino Vérité Blackjack — the serious desktop simulator
Casino Vérité Blackjack (often just "Verité") is the veteran's tool: a deeply configurable Windows simulator with drill modes for strategy and counting that advantage players have used for a long time. If you want to model specific rule sets and penetration in detail, few things match it.
Where it falls short: it is paid, Windows-only, and its interface shows its age. It is overkill — and the wrong form factor — for someone who just wants to practice basic strategy on their phone during a commute.
Best for: committed counters who want a powerful desktop simulator and do not care about polish.
5. The assorted mobile trainers
Search either app store and you will find a long tail of smaller blackjack trainers — Blackjack Ace, various "card counting coach" apps, and others. Some are fine for casual, occasional practice. As a group, though, they tend to share the same two gaps: they rarely do spaced repetition, and they almost always assume US rules only. Check both before you commit time to one.
Want the free option with adaptive practice and ENHC?
The Blackjack Strategy Trainer 21 app focuses your practice on the hands you get wrong (below 80% accuracy, after at least three attempts), and it supports S17, H17 and European No Hole Card rules.
So which blackjack trainer should you use?
- You want to learn basic strategy for free: start with the basic strategy fundamentals and drill them in Blackjack Strategy Trainer 21.
- You play European (ENHC) tables: use a trainer that supports ENHC — most do not.
- You want to become a card counter: Blackjack Apprenticeship or Casino Vérité are built for that.
- You just need to check a play: BlackjackInfo's web engine is a fast, trusted reference.
Whatever you pick, the math underneath is the same. Perfect basic strategy pulls the house edge down to around 0.5% — see exactly how much each rule is worth in our guide to the blackjack house edge by rule set — and no app changes that number for you. It only changes how quickly you get there.