Comparison

びっくりアプリ vs BlackJack8

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

びっくりアプリ

Features
Read full description

ボタンを押したら、ドッキリをかけられるアプリです。 ボタンを押すと骸骨が出現して、ユーザーを驚かせます。その時のiphoneの傾き具合をセンサによって、計測してビビり度を判定します ビビリ度とは、iPhoneのセンサで、iPhoneが、どれくらい傾いたかを計測し、その傾き具合によって、ビビリ度を三段階に判定します。 注意:使用するときは、iphoneの左側にあるサイレントスイッチをオフにしてください。(これをしなければ音が出ません)

About

BlackJack8

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
Read full description

The number of cards remaining can be predicted by inputting cards. Players can predict the number of cards remaining by inputting cards, and deriving the best strategy by themselves. Three counting systems are introduced. HI AND LOW(FOR GENERAL BEGINNERS) HI OPT II(FOR ADVANCED AND CAUTIOUS PLAYERS) ZEN(FOR ADVANCED PLAYERS) Data analysis to determine when to make a decision.The number is set to be added to the EXP (expected value) of the method, which is considered independently. The higher the system count, the better it is for the player.g can be predicted by inputting cards.Players can predict the number of cards remainingby inputting cards, and deriving the best strategy by themselves.Three counting systems are introduced.HI AND LOW(FOR GENERAL BEGINNERS)HI OPT II(FOR ADVANCED AND CAUTIOUS PLAYERS)ZEN(FOR ADVANCED PLAYERS)Data analysis to determine when to make a decision.The number is set to be added to the EXP(expected value) of the method, which is considered independently. The higher the system count, thebetter it is for the player. ※You will need to purchase a subscription to access this app. Term of use => https://oncasi.win/terms-and-conditions/

Screenshots

びっくりアプリ3 screens
BlackJack84 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
びっくりアプリ versus BlackJack8: the parameters behind the verdict, then further details
ParameterびっくりアプリBlackJack8
Price$1.99Free — better
Rating1.0 (1 ratings) — better—
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings1 — better—
Update frequencyEvery 4 monthsEvery 8 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
Monetization—Subscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.2 — better15.6
Further details — not scored
Size20 MB61 MB
Age rating9+4+
DeveloperYusaku FujitaANYONE INC.

Customer experience

びっくりアプリ

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

BlackJack8

Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

びっくりアプリ

No in-app purchases

1 purchases

BlackJack8

Subscriptions1
  • Subscription(1 month)1 Month trial$29.991 Month

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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