# BlackJack8 vs SEED by じゃんけんポーカー

The clearest difference is in-app purchases: SEED by じゃんけんポーカー at none against BlackJack8's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. BlackJack8 sells 1 in-app purchase, starting at $29.99 per month. SEED by じゃんけんポーカー asks for nothing beyond the download.

BlackJack8 ships an update every 8 days, SEED by じゃんけんポーカー every 9 days. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | BlackJack8 | SEED by じゃんけんポーカー |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 9 days |
| Monetization | Subscription | — |
| Size | 61 MB | 78 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ANYONE INC.](https://appshunter.io/developer/1577319263) | [1900 Co.](https://appshunter.io/developer/1630961217) |

## What reviewers say

### BlackJack8

[App page](https://appshunter.io/ios/app/blackjack8/id1577319261)

Learn and master card counting strategies for blackjack. This app offers three distinct counting systems and data analysis tools to help you predict remaining cards and optimize your gameplay. It's designed for both beginners and advanced players seeking to improve their decision-making at the table.

**Highlights:** Card counting strategy training, Three counting systems (Hi-Lo, Hi Opt II, Zen), Data analysis for decision making, Predict remaining cards, EXP (expected value) calculation, Beginner and advanced modes

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription(1 month) | $29.99 | per month |


### SEED by じゃんけんポーカー

[App page](https://appshunter.io/ios/app/seed-by/id6757753733)

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

**In-app purchases:** none


## Frequently asked questions

### Is BlackJack8 free?

BlackJack8 is free to download, with in-app purchases available.

### Is SEED by じゃんけんポーカー free?

SEED by じゃんけんポーカー is free to download, with no in-app purchases.

### Do BlackJack8 or SEED by じゃんけんポーカー have ads?

Neither BlackJack8 nor SEED by じゃんけんポーカー shows ads.

### Which is updated more often, BlackJack8 or SEED by じゃんけんポーカー?

BlackJack8 ships an update every 8 days, and SEED by じゃんけんポーカー every 9 days. Most recently, BlackJack8 was updated on October 15, 2026 and SEED by じゃんけんポーカー on October 11, 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.*