# Pick21 Solitaire vs Blackjack Strategy Trainer 21

The clearest difference is in-app purchases: Blackjack Strategy Trainer 21 at none against Pick21 Solitaire's 1. Blackjack Strategy Trainer 21 also leads on iOS requirement (15.0 vs 26.1). Pick21 Solitaire's advantage is ads (none vs shown) and update cadence (every 2 days vs weekly). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Pick21 Solitaire sells 1 one-off in-app purchase. Blackjack Strategy Trainer 21 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Pick21 Solitaire against 5.0 for Blackjack Strategy Trainer 21. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Pick21 Solitaire ships an update every 2 days, Blackjack Strategy Trainer 21 weekly. Both last shipped on November 5, 2026.

## The numbers

| Metric | Pick21 Solitaire | Blackjack Strategy Trainer 21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/pick21-solitaire/id6755499573/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/blackjack-strategy-trainer-21/id6773344208/reviews) |
| Number of ratings | 2 | 2 |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | **Free** | Ad-supported |
| Size | 10 MB | 83 MB |
| Requires iOS | 26.1 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gabriel Knuth](https://appshunter.io/developer/1854250138) | [CWTI Ltd](https://appshunter.io/developer/1853539145) |

## What reviewers say

### Pick21 Solitaire

[App page](https://appshunter.io/ios/app/pick21-solitaire/id6755499573)

This card game offers a unique twist on solitaire, challenging players to combine cards to reach 21. It's easy to pick up but offers engaging gameplay for both quick breaks and extended play sessions.

**Highlights:** Combine cards to hit 21, Fast-paced gameplay, High score system, Simple to learn, Suitable for short sessions

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pick 21 Developer Tip | $1.99 | one-time |


### Blackjack Strategy Trainer 21

[App page](https://appshunter.io/ios/app/blackjack-strategy-trainer-21/id6773344208)

Master blackjack with a strategy trainer that uses spaced repetition to adapt to your learning. Practice every hand decision with instant feedback and learn from structured lessons. Supports multiple rule sets for realistic casino training.

**Highlights:** Spaced repetition learning, Practice hit, stand, double, split, surrender, Supports S17, H17, and ENHC rule sets, Full basic strategy chart, Structured lessons for beginners, Realistic casino practice environment, Cloud sync across devices

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

**In-app purchases:** none


## Frequently asked questions

### Is Pick21 Solitaire free?

Pick21 Solitaire is free to download, with in-app purchases available.

### Is Blackjack Strategy Trainer 21 free?

Blackjack Strategy Trainer 21 is free to download, with no in-app purchases.

### Which has better reviews, Pick21 Solitaire or Blackjack Strategy Trainer 21?

Pick21 Solitaire and Blackjack Strategy Trainer 21 are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do Pick21 Solitaire or Blackjack Strategy Trainer 21 have ads?

Blackjack Strategy Trainer 21 shows ads; Pick21 Solitaire does not.

### Which is updated more often, Pick21 Solitaire or Blackjack Strategy Trainer 21?

Pick21 Solitaire ships an update every 2 days, and Blackjack Strategy Trainer 21 weekly. Most recently, Pick21 Solitaire was updated on November 5, 2026 and Blackjack Strategy Trainer 21 on November 5, 2026.

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