GTO Trainer · Texas Hold'em decision practice

Practise Hold'em decisions and see what each one is worth.

Play full hands or drill one spot at a time. Every decision is graded in big blinds of EV — by Monte Carlo against a villain range that narrows street by street, or by solver-style preflop charts — with a plain-English reason for each option. Cash and tournaments with ICM, 2–9 players, English and 中文. Training only — no real money.

Start practising See the features

200Table formats: 2–9 players × cash or MTT × stack × stage

19Hand-tuned 6-max preflop charts

4Ratings per decision: Best, Good, Inaccuracy, Blunder

2Languages: English and 中文

gto.vber-ai.com

GTO Trainer grading a flop decision: an EV table for raise, call and fold with the pot-odds explanation

01 The problem

Studying poker strategy usually means expensive software, or charts with no explanations.

Solvers are slow and expensive

Desktop solvers cost hundreds of dollars and take minutes per spot — and you still have to know which spots to run.

Charts don't tell you why

A preflop chart says "fold". It doesn't say how much the other options lose, or what changes on the bubble.

Results hide mistakes

Win a pot with a bad call and it feels right. Without EV, you learn from luck instead of decisions.

02 Features

Real screenshots of the running app. Stats come from a practice session played for these screenshots.

EV grading

Every option, priced in big blinds

Best, Good, Inaccuracy or Blunder — with the reason

What it does — after each decision, the Analysis panel shows the EV of every option, how often the villain folds, calls or raises, your equity against the range that takes each action, and the pot odds you needed.

Options within simulation noise of the best are tagged "≈best" and count as correct
Pot-odds prompt on every call: "Call X to win Y · need Z% equity"
Minimum-defence-frequency and ICM tips where they matter
Hand summary separates the result (luck) from the EV you lost (your control)

Preflop drill with the 13×13 raise/call/fold grid

Preflop & spot drills

Drill exactly the spot you're weak in

Preflop charts, postflop spots, push/fold and 3-way pots

What it does — preflop drills grade you against chart frequencies and show the full 13×13 grid with your hand highlighted. The postflop spot filter deals only the situations you pick — for example "Flop · Facing a bet · Middle pair".

Spot filter by street, situation, hand strength and pot type (single-raised, 3-bet, multiway)
Earlier streets are auto-played so you land in the spot you asked for
Push/fold below 12bb, 3-bet-or-jam between 13bb and 25bb, deep play above that
Drills favour mixed and borderline hands — the ones worth practising

Stats view with KPI tiles and accuracy by street and situation

Stats & review

Find your leaks, then fix them

Accuracy and EV loss by street, situation, hand, pot, position and game

What it does — every graded decision feeds your stats. "Work on these first" lists your three weakest areas, and the Mistakes log lets you redo each one.

Six breakdowns: street, situation, hand strength, pot type, position and game
Redo mistakes one by one, or all in order
Export hand histories (.txt) and decisions (.csv, opens correctly in Excel)
A status bar of your last 16 decisions, using shapes as well as colours

Stealth mode & 中文

Looks like work. Speaks two languages.

An IDE disguise with a boss key, and a full Chinese interface

What it does — stealth mode restyles the trainer as an IntelliJ-style Java project — practice modes become .java files — and Esc flips to a page of fake code. Switch the whole app between English and 中文 at any time.

Dark (Darcula) and light (IntelliJ Light) themes
Keyboard first: F fold, C check/call, 1–5 bet sizes, R raise, A all-in, Esc boss key
Colour-blind-safe palette: orange and blue, never red against green
Language follows your browser on first visit, then remembers your choice

03 Everything included

Free, in your browser, with no account and no real money.

EV for every option

See what each choice is worth in big blinds.

≈

Fair grading

Close calls within simulation noise count as correct.

13²

Range grids

13×13 charts with your hand highlighted.

ICM

Tournament ICM

Bubble and final-table pressure built into every decision.

2–9

Any table size

Heads-up to full ring, cash or tournament, 10bb to 100bb.

⌖

Spot filter

Drill exactly the street, situation and hand you choose.

↺

Mistake review

Redo every inaccuracy and blunder until it sticks.

中

English & 中文

Switch the whole app between languages at any time.

04 Privacy & responsible play

A study tool, not a gambling product.

No network requestsThere's no backend, analytics or telemetry — and the Content Security Policy enforces it.
Your data stays in your browserStats, review log, hand histories and settings live in localStorage. Clearing browser data removes them.
No accountOpen the page and play. Exports are files on your own computer.
No real moneyGTO Trainer doesn't offer or promote gambling. Follow the laws where you live and play responsibly.

05 FAQ

Is this a solver?

No — it's a GTO-style practice tool. It approximates solver strategy with hand-tuned charts and a fast model, so every decision can be graded instantly in the browser.

Where do the preflop charts come from?

6-max 100bb cash uses 19 hand-tuned, solver-style charts. Other table sizes, stack depths and tournament stages use ranges generated for that format.

Does it cover tournaments?

Yes: stacks from 10bb to 100bb, push/fold and 3-bet-jam regimes, and bubble and final-table stages with ICM.

Can I use it in Chinese?

Yes. The whole interface, explanations and exports switch between English and 中文.

What is stealth mode?

An optional look that makes the trainer resemble a Java IDE, with Esc as a boss key that shows a page of code.

Is my data uploaded?

Never. The app makes no network requests at all.

Your next decision, graded.

Open the trainer and play a hand — no sign-up, no download, no real money.

Start practising → Ask about custom work