# Double Down: Blackjack Trainer — Strategy Chart, EV & Counting

> Blackjack trainer teaching strategy through expected value and probabilities. (iPhone/iPad app by Neeraj Aggarwal.)

- Source: https://appshunter.io/ios/app/double-down-blackjack-trainer/id6777006186 (this page in markdown: same URL + `.md`)
- Developer: [Neeraj Aggarwal](https://appshunter.io/developer/1877631231)
- Category: Games, Education, Card
- Price: Free
- Rating: 4.50/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 22 MB
- Languages: American English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France) and 34 more
- Released: 2026-06-12
- Data updated: 2026-09-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/double-down-blackjack-trainer/id6777006186/reviews.md

## What is Double Down?

Double Down is the blackjack trainer that shows its work.

Most apps just tell you the "correct" move. Double Down teaches you the math behind it — the expected value (EV) of every decision — so you stop memorizing a chart and start genuinely understanding the game.

No Double Down account required; optional iCloud sync and Game Center achievements use your Apple account.

HOW IT WORKS
• Deal a real hand and choose your play — hit, stand, double, split, or surrender.
• Get instant feedback on whether it was the EV-optimal decision.
• Tap to see exactly why.

SEE THE MATH
Every hand opens into a clear, honest breakdown:
• Expected value of each action, side by side
• Win / push / loss probabilities
• Your bust risk if you hit
• The dealer's full distribution of final totals

TRAIN FOR YOUR EXACT TABLE
Basic strategy changes with the rules — so configure them all:
• 1–8 decks
• Dealer hits or stands on soft 17 (H17 / S17)
• 3:2 vs 6:5 blackjack payouts
• Late, early, or no surrender
• Double after split, resplits, hit split aces
• Even the Free Bet variant

TRACK YOUR PROGRESS
• Accuracy, streaks, and decisions over time
• Performance broken down by situation
• Your recent mistakes, so you always know what to drill next
• Open lessons and focused drills directly from Progress
• Save and restore your learning progress in a local file

LEARN THE CONCEPTS
Ten focused lessons on the probability and expected value beneath basic strategy — hard totals, soft totals, pairs, doubling, surrender, and how each rule change moves the math.

DESIGNED TO FOCUS
A quiet, premium, ad-free experience with a beautiful Day and Night theme. Practice works locally; optional iCloud sync and Game Center achievements use Apple's services when enabled.

Product-usage analytics help guide improvements. Your individual hands and practice history are not sent to TelemetryDeck.

Double Down is an educational strategy trainer: no real money is staked and no wagers are placed.

## Key features

- Expected value breakdown
- Win/push/loss probabilities
- Customizable table rules
- Progress tracking
- Focused strategy lessons
- Ad-free experience


## Frequently asked questions about Double Down

### Does Double Down have ads?

No, Double Down offers a premium, ad-free experience designed for focused practice.

### How does Double Down teach strategy?

Instead of just memorizing charts, Double Down breaks down the expected value (EV) and probabilities of each decision, helping users understand the math behind optimal play.

### Can I customize the blackjack rules in Double Down?

Yes, you can configure various rules including number of decks, dealer soft 17 rules, payouts, surrender options, and doubling rules to match your specific table.

### Does Double Down require an account?

No account is required for core functionality. Optional iCloud sync and Game Center achievements utilize your Apple account.

### What kind of progress tracking does Double Down offer?

It tracks accuracy, streaks, and decisions over time, breaking down performance by situation and highlighting recent mistakes for targeted practice.

### Is Double Down suitable for beginners?

Yes, with ten focused lessons on probability and expected value, it's designed to help users learn the concepts beneath basic strategy.

### What devices does Double Down support?

Double Down is available on Mac, iPhone, and iPad, offering a consistent experience across Apple devices.

### How often is Double Down updated?

The app was last updated on September 8, 2026, with version 1.9, indicating active development and improvements.

## Version history (last 5 releases)

### 1.9 — 2026-09-08

- Save and restore your learning progress
- Open a relevant lesson or focused drill directly from Progress tab
- Improve performance and reliability

### 1.8 — 2026-08-31

- Adds a Challenge a friend option to any finished practice hand
- Adds an original-bets-only settlement option for European no-hole-card rules
- Performance & reliability improvements

### 1.7 — 2026-08-14

- Performance & reliability improvements

### 1.6 — 2026-08-10

- Adds a private, adaptive Daily Coach on Learn that turns costly and repeated strategy misses into short spaced-review sessions
- Adds a Card Counting Lab for Hi-Lo tags, running and true counts, and Illustrious 18 index-play practice
- Adds playable friend challenges that keep each player's move hidden until both have made their call
- Makes the Hand of the Day widget interactive, so you can answer and reveal the best play from your Home Screen
- Improves accessibility, performance, and progress-history reliability throughout the app

### 1.5 — 2026-08-04

- Performance & reliability improvements

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## More apps by Neeraj Aggarwal

- [LocoPoko: Poker Chip Tracker](https://appshunter.io/ios/app/locopoko-poker-chip-tracker/id6759246398)
- [Mahjong Mind: Learn & Play](https://appshunter.io/ios/app/mahjong-mind-learn-and-play/id6776985264)
- [Tether Tantrum](https://appshunter.io/ios/app/tether-tantrum/id6777026828)
- [Pass Party: One-Phone Games](https://appshunter.io/ios/app/pass-party-one-phone-games/id6778178204)

All apps by Neeraj Aggarwal: https://appshunter.io/developer/1877631231

## Related topics

[double down blackjack](https://appshunter.io/ios/topics/double-down-blackjack) · [card counting blackjack](https://appshunter.io/ios/topics/card-counting-blackjack) · [blackjack trainer pro](https://appshunter.io/ios/topics/blackjack-trainer-pro)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-10.*