Chapter 01

Welcome to Preflop+

Preflop+ is a poker training tool built around Nash equilibrium theory. Learn optimal preflop decisions, practice equity estimation, master pot odds, and build custom ranges for mathematically sound play.

What You'll Learn

Preflop+ covers every skill you need for strong preflop play. Explore the features below or follow the tutorial from start to finish.

Nash Charts

Browse optimal Nash equilibrium preflop ranges

Training Modules

Five specialised trainers with ELO tracking

Poker Calculators

Equity, pot odds, MDF, geometric sizing & more

My Ranges

Create, edit, and manage custom ranges

Equity Drills

Estimate hand equity quickly and accurately

Pot Odds Trainer

Learn when you have enough equity to call

Click any feature above to jump to its tutorial, or use the sidebar to navigate at your own pace.

Chapter 02

Home Screen

The home screen is your central hub. A card-based layout gives you quick access to every feature in the app.

Skill Rating Dashboard

At the top, a hero card displays your overall skill rating:

Combined ELO	Your aggregate rating across all training modules
Nash Accuracy	Your correct-answer percentage in Nash training
Equity Accuracy	Your correct-answer percentage in equity drills
Current Streak	Consecutive days you've completed training — keep it going!
Greeting	A personalised message based on your skill progression level

Tap the hero card to jump straight into a training session.

Navigation Cards

Nash Charts	Browse optimal Nash equilibrium preflop ranges
Train Me	Access all five training modules
Poker Maths	Open the suite of poker calculators
My Ranges	Create, edit, and manage custom ranges
Go Pro	Unlock premium features (free users only)

Top Bar

Settings	App preferences and account management (gear icon)
Account	View subscription status or upgrade to Pro
Share	Share the app with friends

Chapter 03

Nash Charts

The reference tool at the heart of Preflop+. Nash Charts show you the mathematically optimal action for every hand in every preflop scenario.

The Hand Matrix

A 13x13 hand matrix displays all 169 unique starting hands:

Diagonal	Pocket pairs (AA, KK, QQ, ... , 22) running top-left to bottom-right
Above	Suited hands (AKs, AQs, etc.)
Below	Offsuit hands (AKo, AQo, etc.)

Each cell is colour-coded by frequency — brighter colours mean higher play frequency, muted colours mean fold. Tap any cell to see the exact action frequency for that hand.

Configuring the Scenario

1
Number of Players
Select your table size: 2 to 9 players. Each size changes which positions are available.
2
Ante
Choose the ante structure: No Ante, 10%, 12.5%, 20%, or BB Ante. Antes widen ranges because there's more money in the pot.
3
Stack Size
Select effective stack depth from 5 BB to 30 BB. Use arrow buttons to page through sizes. Shorter stacks mean wider shoving ranges.
4
Action Type
Choose: Shove (go all-in first), Call (an opponent shoved and you decide whether to call), Rejam (an opponent raised and you re-shove all-in over them), or Call Rejam (you opened, an opponent went all-in over your raise, and you decide whether to call).
5
Hero & Villain Position
Select your seat (UTG, LJ, HJ, CO, BTN, SB, BB). For Call/Rejam actions, also select the opponent's position.

Start with simple scenarios (e.g., SB vs BB shove at 10 BB) to build intuition. Compare how ranges change as stack depth increases and notice how antes widen your ranges.

Chapter 04

Nash Trainer

Practice optimal preflop decisions based on Nash equilibrium theory. The trainer uses an ELO rating system to track your improvement over time.

Configure Your Session

Marginal Spots Only

Toggle on to focus on close, borderline decisions where the correct answer isn't obvious. Great for advanced practice.

Decision Points

Choose which actions to practise: Shove, Call, Rejam, and/or Call Rejam. Toggle each on or off.

Ante Levels

Select which ante structures to include: No Ante, 10%, 12.5%, 20%, BB Ante.

Players & Stack Sizes

Toggle table sizes (2-9 players) and stack depth ranges (5-10, 10-15, 15-20, 20-25, 25-30 BB).

During Training

1
Read the Scenario
A poker table is displayed with your seat (Hero) and the opponent's seat (Villain) highlighted. Stack size, positions, action type, and ante level are shown.
2
View Your Cards
Your hole cards are shown face-up.
3
Make Your Decision
Tap Yes or No to answer whether you should take the action with this hand.

Results

Instant Feedback

After each answer, see correct/incorrect feedback, the full range matrix with your hand highlighted, and the correct action frequency explained.

ELO Rating

Your ELO rating tracks your long-term improvement. It goes up for correct answers and down for incorrect ones, with harder questions carrying more weight.

Session Summary

See your updated ELO, total questions answered, pass/fail percentage, and your last 10 results as a visual streak.

Chapter 05

Equity Drills

Learn to estimate hand equity accurately and quickly across different scenarios and difficulty levels.

Configure Your Drill

Difficulty

Easy (3 options, wide gaps), Normal (5 options, moderate gaps), or Hard (6 options, narrow gaps).

Spot Type

All Spots, Cards Only (specific vs specific), Ranges Only (range vs range), or Cards vs Ranges.

Street

Preflop, Flop, or Turn — each with community cards shown as applicable.

During Training

1
View the Setup
Your hero cards are displayed along with the opponent's hand or range, plus any board cards.
2
Estimate the Equity
Multiple-choice options show equity percentage ranges (e.g., "35-45%", "45-55%"). Tap the range you believe is correct.
3
Review the Result
The correct equity is revealed with your selection highlighted green (correct) or red (incorrect).

Start on Easy to build a feel for common matchups. Learn the rules of thumb: pairs vs overcards (~55/45), dominated hands (~70/30).

Chapter 06

Pot Odds Trainer

Learn whether you have enough equity to profitably call a bet in any situation.

Options

Extra Info Toggle

When on, your exact equity is shown alongside the question (easier). Turn it off for a harder challenge where you estimate equity yourself.

During Training

1
Read the Table
A poker table is dealt with 3, 5, or 6 players. The board shows a flop, turn, or river.
2
Assess the Situation
Your hero cards, the villain's cards, the pot size, and the bet to call are all displayed.
3
Make Your Call
Tap Yes or No — do you have enough equity to continue?

Results Breakdown

Hero Equity	Your actual equity percentage against the villain
Required Equity	The minimum equity needed to break even on a call
Pot Size	Total pot before your decision
Bet to Call	How much you need to put in
Calling EV	Expected value of calling (positive = profitable)

Remember the formula: Required Equity = Bet to Call / (Pot + Bet to Call). Practice with extra info off once you're comfortable.

Chapter 07

Combinatorics Trainer

Learn to count hand combinations and understand how your hole cards act as blockers that reduce the opponent's possible holdings.

During Training

1
View the Setup
Your hero cards are displayed along with the board (flop/turn/river) and the villain's range shown as a 13x13 grid.
2
Count the Combos
You're asked how many combos of a specific hand type the villain has. Choose from 6 multiple-choice options.
3
Learn from Results
The correct combo count is revealed with blocker effects explained — how your specific hole cards reduce the villain's possible holdings.

Hand Types You'll Practise

Made Hands

High Card, Pair, Two Pair, Three-of-a-Kind, Straight, Flush, Full House, Four-of-a-Kind, Straight Flush.

Drawing Hands

Gutshot, Open-Ended Straight Draw (OESD), and Flush Draw.

Combo counting is essential for range analysis. When you know how many combinations of strong hands your opponent can have, you make better decisions about calling, folding, or bluffing.

Chapter 08

Ranges Trainer

Memorise and apply your custom preflop ranges through targeted practice sessions.

Configure Your Session

Select Range

Choose which of your custom ranges to train with from your saved ranges in "My Ranges".

Filters

Filter by hero action (Open, 3-Bet, Call, Shove, etc.), stack sizes, and table sizes to focus your practice.

During Training

1
Read the Scenario
A poker table shows your position and game setup (e.g., "UTG Open at 20 BB in a 6-max game").
2
View Your Hand
Your hero hand is displayed face-up.
3
Answer
Tap Yes or No — do you take this action with this hand?

Results

Feedback

After each answer, the full range grid is shown with your hand highlighted so you can see exactly where it falls. Your last 10 results are tracked as a visual streak.

Create your ranges first in the Range Editor, then use this trainer to memorise them. Focus on borderline hands — those are the ones you'll get wrong most often at the table.

Chapter 09

Poker Math Calculators

A suite of mathematical tools accessible from the Poker Maths card on the home screen. Use these for real-time calculations during study or review.

Equity Calculator

Calculate Hand Equity

Set up 2 to 4 players, enter specific hole cards or select ranges using the poker keyboard, optionally add board cards, and view real-time equity percentages that update instantly as you change inputs.

Betting Math Calculator

Both Sides of a Bet

Enter pot size and bet size to see both perspectives simultaneously. Facing a bet: pot odds ratio and equity needed. When betting: MDF, Alpha (breakeven bluff frequency), and optimal value-to-bluff ratio. Quick presets: 25%, 33%, 50%, 75%, 100%, up to 500% pot.

Pot Odds Calculator

Focused Pot Odds Tool

Enter pot size and bet to call. See pot odds as percentage and ratio, required equity, bet as percentage of pot, and total pot after call.

MDF Calculator

Minimum Defense Frequency

Enter bet size and pot size. See MDF percentage, value-to-bluff ratio, bluff percentage, fold equity, and breakeven bluff frequency (Alpha).

Geometric Sizing Calculator

Multi-Street Bet Planning

Enter pot size and effective stack, select remaining streets (2-5). See the optimal geometric bet size and a street-by-street breakdown showing bet amount, pot size after each bet, and updated SPR — helping you naturally get all-in by the river.

Hand Rankings

Equity-Based Hand Rankings

View all hands ranked by equity against random opponents. Use the slider to select a hand percentile (5% to 100%) and see the 13x13 matrix colour-coded from red (strongest) through yellow (mid-range) to blue (weakest).

Chapter 10

My Ranges

Create, edit, and manage your personal preflop range library. Build ranges from scratch or explore the built-in sample range to see how the editor works.

Range List

Sample Range

A pre-loaded sample range is included to showcase the editor's features. It's view-only and marked with a lock icon — use it to explore how ranges are structured before building your own.

Custom Ranges

Ranges you've created. Fully editable. Long-press or swipe for options: Edit, Duplicate, Rename, Delete, or Export as a share code.

Import

Tap the cloud icon to download ranges from coaching sites or stables. If you're a student, enter the download code provided by your coach to import their custom ranges into Preflop+ for reference and training.

Range Editor

1
Set the Context
Choose table size (2-9), stack size (5-250 BB), hero action (Open, Call, 3-Bet, 4-Bet, 5-Bet, Shove, Limp, ISO-Raise), hero position, and villain position.
2
Edit the Matrix
Tap cells on the 13x13 hand matrix to add or remove hands. Use the frequency slider to set how often you play each hand (10% to 100%).
3
Manage Overlays
Add overlays for mixed strategies (e.g., sometimes 3-bet, sometimes call). Each overlay has its own frequency and visual layer on the matrix.

Deleting the app will delete all your custom ranges. Use the export option on your range list cards to back up your ranges — you can re-import them later.

Build your ranges here first, then use the Ranges Trainer to memorise them through repetition.

Chapter 11

Settings & Pro

Customise your experience and unlock the full power of Preflop+ with a Pro subscription.

Display & Preferences

Stack Display	Show effective stacks as BB count or M-value
Ante Format	Display antes as fractions or decimals
Position Names	Classic (MP1, MP2) or modern (LJ, HJ) labels
Clear Demarcation	Enhanced visual clarity for range boundaries

Support & Community

Rate Us	Leave an App Store review
Send Feedback	Email the development team with suggestions
Share App	Send the app link to friends
Our Apps	Browse other ThinkGTO apps (Postflop+, Solver+, etc.)

Upgrading to Pro

Free users can access core features with daily limits. Pro unlocks everything:

What Pro Unlocks

Unlimited training attempts, full Nash chart access across all stack sizes and positions, all calculators and trainers, detailed stats and analysis, no ads, and range import/export.

Subscription Options

Monthly (recurring), Yearly (best value per month), or Lifetime (one-time purchase). Access from the home screen "Go Pro" card, settings, or when you hit a daily limit.

Chapter 12

Poker Concepts Glossary

Quick reference for key terms used throughout the app.

Nash Equilibrium

A game theory strategy where neither player can improve by changing their strategy alone. In poker, it defines unexploitable preflop ranges.

Equity

Your percentage chance of winning the pot at showdown.

Pot Odds

The ratio of the current pot to the cost of a call. If your equity exceeds the pot odds requirement, calling is profitable.

MDF (Minimum Defense Frequency)

The minimum percentage of your range you must continue with to prevent your opponent from profiting with any bluff.

Alpha

The breakeven bluff frequency — how often a bluff needs to succeed to be profitable. Alpha = Bet / (Bet + Pot).

EV (Expected Value)

The average amount you expect to win or lose with a decision over the long run. Positive EV = profitable.

Combos / Combinations

The number of specific card combinations that make up a hand. E.g., there are 6 combos of any pocket pair.

Blockers

Cards in your hand that reduce the number of combinations your opponent can hold. E.g., holding an Ace "blocks" opponent from having AA.

SPR (Stack-to-Pot Ratio)

Effective stack divided by the pot. Lower SPR = more committed to the pot.

Geometric Sizing

A bet sizing strategy that divides remaining stack evenly across streets (as a percentage of pot) to naturally get all-in by the river.

Key Actions

Shove — all-in preflop. Rejam — re-shove over a raise. 3-Bet / 4-Bet / 5-Bet — successive re-raises. Open — first voluntary raise. ISO-Raise — isolation raise against a limper.

ELO Rating

A skill rating system (borrowed from chess) that adjusts based on performance. Higher = better. Starting value is 1000.

Range & Frequency

A range is the set of all hands you would play in a given situation, shown as a 13x13 matrix. Frequency is how often you take an action with a hand (100% = always, 50% = mixed strategy).

BB & M-Value

BB (Big Blind) — stack sizes are measured in BB to normalise across stakes. M-Value — your stack divided by blinds + antes per orbit, showing how many orbits you can survive.