GTO preflop training

Stop guessing preflop.
Start knowing.

The simulator that puts you against real hands at a 6-max table, corrects every mistake instantly, and forces you to drill exactly your weakest spots — until it becomes automatic.

Train for free Try without signing up →

✓ No card · 100% free · Nothing to install

6-max poker table in GTO Poker Lab showing the player hand with RAISE and FOLD options
0+
hands trained
0
GTO drills + random mode
0
combos per range chart
100%
free forever
The problem

Preflop is unforgiving

You don't bleed your bankroll on a missed river. You lose it hand after hand, in three-second decisions you never review: an open you shouldn't have made, a marginal 3-bet call, a fold that was too timid against a squeeze.

The problem isn't that you don't know the theory. It's that you haven't automated it under pressure, in the right position, against the right sizing. Reading a range and executing it in a real game are two different skills. Here you train the second one.

You play blindMarginal hands on instinct, with no idea if they're +EV.
You hesitate under pressureYou don't know when to defend, 3-bet or fold.
You repeat your leaksNo feedback, no review — the same mistake every week.
Everything you need

A complete preflop lab

Drills, ranges, stats and a coach that spots your leaks. In a single app, free.

8 drills + random mode

OR, 3-Bet, Squeeze, Cold 4-Bet and defenses. Every spot real, isolated and repeatable until you master it.

Stats and streak

Overall accuracy, streak, XP and breakdown by drill and position. Your real progress, not a feeling.

GTO range charts

13×13 grid per position colored RAISE / LIMP / FOLD. The exact range, instantly.

Gamification

Level, XP, daily streak, achievements and leaderboard. Preflop training goes from chore to habit.

Spaced repetition

Feeds your mistakes back at the optimal moment. You don't redo what you already know. See how →

AI coach

Analyzes your history and spots real leaks: where you over-defend or fold hands that are +EV.

Cross-platform (PWA)

Install it on mobile straight from the browser and use it like a native app. No app stores.

Free, no friction

One click and you're in. No forms, no card, no downloads.

The science of learning

The system remembers what you forget

Solving 50 random hands isn't training: you already knew most of them, and the two or three you missed you'll miss again next week. GTO Poker Lab doesn't work like that.

1
You miss a hand. The system flags that exact drill + position + hand combination that's costing you EV.
2
Prioritized review. It comes back more often — in mixed mode, ~30% of the questions are your own mistakes.
3
Mastered after 3 correct answers. Once you get it right three times in a row, it leaves the queue. Now it's long-term memory.
  • It's not cramming: you drill exactly your weakest spots.
  • Automatic prioritization based on your errors, not generic exercises.
Try spaced repetition free
How it works

From zero to automatic in 3 steps

1

Sign in in one click

No forms, no friction. Sign in and you're in.

2

Decide at the table

We sit you at a 6-max with a real hand. You choose Fold, Call, Raise or 3-Bet — and the size in BB.

3

Feedback + review

You instantly see the correct GTO play. Your mistakes go back into the queue until you master them.

Range charts

The exact range, one tap away

A full 13×13 grid per position for every drill —Open Raise, 3Bet/Call, Squeeze, Cold 4Bet, Limp— each with its own action legend. Check the correct range before, during or after training.

Open Raise 3Bet / Call Squeeze Cold 4Bet Limp / Raise
13 by 13 GTO range chart with a color-coded action legend — Open Raise 13 by 13 GTO range chart with a color-coded action legend — 3Bet / Call 13 by 13 GTO range chart with a color-coded action legend — Squeeze 13 by 13 GTO range chart with a color-coded action legend — Cold 4Bet 13 by 13 GTO range chart with a color-coded action legend — Limp / Raise
Open Raise
AI coach

Spot the leak you didn't even know you had

Analyzes your hand history and tells you what to fix, not just what you missed: positions where you over-defend, spots where you fold +EV hands, sizings off GTO.

Analyze my game
Where am I losing EV preflop?
Leak detected: you defend too wide in BB vs squeeze. Fold combos like Q9o and J8s here.
Your HJ open is solid (99% GTO). Keep it up.
Suggested adjustment: lower your 3-bet/call vs CO by 6%. I've added it to your review queue.
What they say

Less intuition, more winrate

Sample testimonials

"I spent two years playing preflop on intuition. In three weeks I stopped defending my blinds with trash against 3-bets. You can see it in my winrate."

Nemesis_NL50Online NL50 reg · 🔥 21-day streak

"What sold me is that I don't redo what I already know. The system keeps throwing me the hands I miss, and now I don't miss them."

gto_grind88Cash grinder · NL100

"The AI coach pointed out a leak in my defense vs squeeze that I didn't even know I had. I adjusted the range and stopped bleeding BBs there."

Zorro_del_riverCash reg · NL25
Questions

Frequently asked questions

Is it really free? +
Yes. Training, checking the range charts, viewing stats and using spaced repetition is free. All you need is to sign in with Google.
Do I need prior experience? +
None in particular. If you know the basic rules of Hold'em, start with Open Raise and the range charts. If you already play regularly, jump straight into random mode or the defense drills against 3-bet and squeeze.
How does spaced repetition work? +
Every hand you miss gets flagged and comes back with priority, mixed into your normal training, until you get it right three times in a row. At that point it's considered mastered and stops repeating: you train long-term memory, you don't cram overnight.
What is GTO and why train it? +
GTO (Game Theory Optimal) is the mathematically balanced game that no opponent can exploit. Training it preflop gives you a solid baseline to later deviate from with judgment against exploitable opponents — but first you need to know what that baseline is.
Can I install it on mobile? +
Yes. It's a PWA: from your mobile browser you can add it to your home screen and use it like a native app, without going through any app store.
Is my data safe? +
Yes. We sign you in via Google OAuth: we only receive your email and profile name to identify your account. We never see your password.

Your next preflop mistake is going to cost you BBs.

Either you train it now, or you pay for it at the table. Start free and let spaced repetition turn your leaks into instincts.

Train for free No card · No install · No excuses