Made a free blackjack trainer with tips and stat tracking and deck estimation. Works great in mobile too.

When I looked for a free tool to practice blackjack, I wasn't really able to find one that had the configurations and polish that I was looking for.

So I made this completely free trainer that teaches you when you make mistakes and also lets you see a heatmap of the errors you made. For advanced players I'd recommend enabling count based deviations.

https://www.blackjacktrainer.fyi/

Feel free to try it out and let me know what you think!
 

This is the best ever Blackjack trainer!  I’ve tried it and loved it. It is “Built by players, for players,” yes, this is the trainer of the player. 

The only advice from me is you make the font of the Hi-Lo running count 10 times larger. 

Hi Aceside, thanks a lot! I really appreciate the feedback.

Are you playing through mobile or through your desktop? I can look into addressing the count font size.

I use an iPhone. 

Great, if you refresh, the deck RC and TC numbers should be much bigger now.

Thanks for the suggestion!

I’ve tried it again and come up with a second advice. You put the “Hit” and “Stand” buttons in the center part of the iPhone screen, so that your thumb can reach the “Hit” button easily.

Actually, I’m right-handed, so please put the “Hit” button a little toward the right side. 

I added a toggle to flip the button layout, the hit and stand buttons will then be on the right side of the screen.

Let me know if that works for you.

Your toggle option is very creative!  However, I prefer this following button layout:

”Surr” “Split” “Stand” “Hit” “Double”

because players use “Hit” a lot more often.

Thanks everyone for trying it out. Here's what's new since I created it initially.

New features

• Global Top-50 Leaderboard — anonymous auto-generated name, rename yourself once you've staked your spot, tiered styling for top ranks, "You" row pinned on mobile.
• Mobile-first redesign — bigger cards, stable felt height, drag-to-dismiss bottom sheet, larger count-HUD chips, reverse-action-bar setting toggle for thumb reach, polished top bar / insurance toast.
• Casino-style multi-hand (2 spots) — bet two spots per round, splits play right-to-left like a real pit, BJ confetti syncs across hands.
• Weak-spot drill — focused practice page that watches your mistake history and rotates a list of your worst basic-strategy cells (hard, soft, pairs, surrender). One decision per deal at a neutral count, graduate a cell with 3-in-a-row, results don't touch your real stats. Cold-start list for new players too.
• Strategy charts overhaul — 1D and 2D basic-strategy charts, deviation reference chart, finer-grained accuracy heatmap, click any mistake → jumps to the matching chart cell.
• Accuracy-over-time + Net-over-time charts — daily accuracy with auto-scaled Y axis, net bankroll over time. Click the accuracy chip to scroll right to it.
• Lifetime Stats + Records panel — persistent tracking separate from session stats, dedicated Records view.
• Multiple-choice quiz mode + stakes presets — plus push-21 standoff handling and a new insurance audio cue.
• Deal speed setting — pick your pace; pre-flip pauses removed, hole-card reveal halved.
• Broke-recovery overlay — graceful UX when you tap out instead of a dead end.
• Feedback widget — upvote/downvote with optional comment, right in the app.

There are too many useless features, I believe.  Nowadays, the most common blackjack rule is H17 8-deck 75% penetration. Table minimum is at least $15 and players cannot spread too widely.  Single and double deck games are almost extinct. 

Changing "8D' to "6D" would be more accurate.  The only crowd who has to deal with many of the 8-deck monstrosities are the unfortunate east-coast dwellers who don't get away from there much.

Single deck is accurately described as almost extinct, but double deck hardly so.  Again, the east coast myopic view appears to be in place. There are plenty of double decks all over the western United States. Maybe more than there are 8-deck games.

I don't mind if most people don't use most of the features, it's there for people who want them.

I'm even considering adding deviations for single/double deck for optimal play. But I'm not sure where to find a reliable source for this.

These 6-deck games usually exist in the high limit rooms; however, these rooms are often not operational these days. In the whole New York State, I’ve only seen two 2-deck games, but trust me, they are gimmicks…

Really great trainer!!

Being able to change the counting system if not already in there would be good I think.

Phil