Comparison

漸化式ガチャ vs ProbabilityPlayer

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

Head to head
About

漸化式ガチャ

Features
Read full description

漸化式ガチャとは,おいしい数学サイト内で2020年7月21日にリリースした,数学ⅡBまでの漸化式の問題をランダムで3題出題するサービスで,web版の機能を受け継ぎ,さらに強化されたアプリ版になります(iPhone,iPad両対応). 当アプリ版には,web版に加え以下の特徴があります. 1.web版よりも問題数増加,ガチャの組み合わせは現在50460通り(web版は18620通り) 2.ガチャ回し放題,時間制限無し 3.上級のみスイッチ((3)で必ず上級が出るようにできます) 4.追加情報記載(出典や問題の背景となる関連情報が記載されています) 5.タイマー搭載(ガチャを回してから100分まで計測可能で,タイムアタックにご利用できます) 6.新出問題判定機能(新出問題か既出問題かの判別ができます) 7.マーク機能(正解した問題等にタップすることでマーキングすることができます) 8.広告無し 9.初級〜上級の排出問題情報(問題と解答一覧付属.問題のTeXファイル付き) 10.アプリ向けに改善されたおいしい数学漸化式のページへのリンク(漸化式未習者でも1から勉強できます) 11.計算用紙機能(Apple純正のPencilKit使用でアプリ内で遅延なく筆記可能,特にiPadでアプリ内で快適に問題が解けます) 12.ダークモード対応(端末に合わせて自動でライトモードとダークモードの切り替えをします) 初めての方はまず「漸化式ガチャ」でGoogle検索しておいしい数学内にあるweb版を無料でご利用し,体験してみてください. X(Twitter)で「漸化式ガチャ」でも是非検索ください. 1度の購入でiPhone,iPad両方でダウンロードして使えるユニバーサルアプリです. おいしい数学X(Twitter)アカウント @oicmath にて,随時開発の情報発信や質問対応等行っております. ※最新のiOS,iPadOSのアップデート対象外の端末では動作保証できませんのでご注意ください. ※当ページ下部の,デベロッパWebサイトのリンクからもアプリの詳細が確認できます.

About

ProbabilityPlayer

Practice probability problems for the Kyotsu Test, a common Japanese university entrance exam. This app focuses on mathematical probability questions and includes diagrams to aid understanding. It is designed to help students prepare for this specific academic assessment.

Highlights
  • Probability problem practice
  • Kyotsu Test focus
  • Mathematical probability
  • Diagrams included
  • University entrance exam prep
Features
Read full description

This is an app for Kyotsu Test, the test widely used in Japanese university entrance exams, dealing especially with probability problems in mathematics. I have applied to the rights holder to use the test.

Screenshots

漸化式ガチャ4 screens
ProbabilityPlayer4 screens

Verdict

The call

The clearest difference is price: ProbabilityPlayer at Free against 漸化式ガチャ's $6.99. ProbabilityPlayer also leads on ads (none vs shown). 漸化式ガチャ's advantage is in-app purchases (none vs 1). On review sentiment, update cadence, 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

ProbabilityPlayer is free to download; 漸化式ガチャ costs $6.99 up front. ProbabilityPlayer sells 1 one-off in-app purchase. 漸化式ガチャ asks for nothing beyond the download.

UpkeepUpdate frequency

漸化式ガチャ ships an update fortnightly, ProbabilityPlayer monthly. The most recent releases landed on October 4, 2026 and September 27, 2026 respectively.

Scorecard3 real differences · 5 level
漸化式ガチャ versus ProbabilityPlayer: the parameters behind the verdict, then further details
Parameter漸化式ガチャProbabilityPlayer
Price$6.99Free — better
Positive reviews100.0% of reviews100.0% of reviews
Update frequencyFortnightly — betterMonthly
AdsYesNo — better
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size10 MB9 MB
Age rating4+4+
DeveloperAkira HiraokaMotonari Hibi

Customer experience

漸化式ガチャ

Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

ProbabilityPlayer

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

漸化式ガチャ

No in-app purchases

1 purchases

ProbabilityPlayer

One-time1
  • Premium$1.99

Questions

Is 漸化式ガチャ free?
漸化式ガチャ costs $6.99, with no in-app purchases.
Is ProbabilityPlayer free?
ProbabilityPlayer is free to download, with in-app purchases available.
Do 漸化式ガチャ or ProbabilityPlayer have ads?
漸化式ガチャ shows ads; ProbabilityPlayer does not.
Which is updated more often, 漸化式ガチャ or ProbabilityPlayer?
漸化式ガチャ ships an update fortnightly, and ProbabilityPlayer monthly. Most recently, 漸化式ガチャ was updated on October 4, 2026 and ProbabilityPlayer on September 27, 2026.

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