# Poker PreFlop Trainer GTO vs Blackjack 21

The clearest difference is price: Poker PreFlop Trainer GTO at Free against Blackjack 21's $9.99. Blackjack 21's advantage is in-app purchases (none vs 3) and device support (4 vs 2). On ads and iOS requirement there is nothing between them.

Poker PreFlop Trainer GTO is free to download; Blackjack 21 costs $9.99 up front. Poker PreFlop Trainer GTO sells 3 in-app purchases, starting at $1.99 per month. Blackjack 21 asks for nothing beyond the download.

## The numbers

| Metric | Poker PreFlop Trainer GTO | Blackjack 21 |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Size | 22 MB | 35 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | +4 |
| Developer | [Ricardo Brancaglion](https://appshunter.io/developer/1191100424) | [Double Down Software](https://appshunter.io/developer/1751632262) |

## What reviewers say

### Poker PreFlop Trainer GTO

[App page](https://appshunter.io/ios/app/poker-preflop-trainer-gto/id6461776324)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Monthly) | $1.99 | per month |
| Pro (Every Two Months) | $2.99 | per 2 months |
| Pro Lifetime | $19.99 | one-time |


### Blackjack 21

[App page](https://appshunter.io/ios/app/blackjack-21-basic-strategy/id6477749240)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Poker PreFlop Trainer GTO free?

Poker PreFlop Trainer GTO is free to download, with in-app purchases available.

### Is Blackjack 21 free?

Blackjack 21 costs $9.99, with no in-app purchases.

### Do Poker PreFlop Trainer GTO or Blackjack 21 have ads?

Neither Poker PreFlop Trainer GTO nor Blackjack 21 shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*