# びっくりアプリ vs BlackJack8

The clearest difference is price: BlackJack8 at Free against びっくりアプリ's $1.99. BlackJack8 also leads on ads (none vs shown) and update cadence (every 8 days vs every 4 months). びっくりアプリ's advantage is in-app purchases (none vs 1) and review sentiment (100% vs 67%). On device support and iOS requirement there is nothing between them.

BlackJack8 is free to download; びっくりアプリ costs $1.99 up front. BlackJack8 sells 1 in-app purchase, starting at $29.99 per month. びっくりアプリ asks for nothing beyond the download.

びっくりアプリ ships an update every 4 months, BlackJack8 every 8 days. The most recent releases landed on October 24, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | びっくりアプリ | BlackJack8 |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/id1508282901/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 8 days** |
| Monetization | — | Subscription |
| Size | 20 MB | 61 MB |
| Requires iOS | **14.2** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Yusaku Fujita](https://appshunter.io/developer/1506740830) | [ANYONE INC.](https://appshunter.io/developer/1577319263) |

## What reviewers say

### びっくりアプリ

[App page](https://appshunter.io/ios/app/id1508282901)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is びっくりアプリ free?

びっくりアプリ costs $1.99, with no in-app purchases.

### Is BlackJack8 free?

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

### Do びっくりアプリ or BlackJack8 have ads?

びっくりアプリ shows ads; BlackJack8 does not.

### Which is updated more often, びっくりアプリ or BlackJack8?

びっくりアプリ ships an update every 4 months, and BlackJack8 every 8 days. Most recently, びっくりアプリ was updated on October 24, 2026 and BlackJack8 on November 3, 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.*