Comparison

ProbabilityPlayer vs UTokyo One

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

Head to head
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.

About

UTokyo One

Features
Read full description

UTokyo One(UTONE)は、東京大学で学ぶ皆さんの日々のキャンパスライフと、より深い学修を強力にサポートする公式アプリです。 大学からの重要なお知らせを見逃さずキャッチし、自身の学びの軌跡をスマートフォンでいつでも振り返ることができます。 UTokyo Accountでログインするだけで、安全かつスムーズに以下の機能をご利用いただけます。 【主な機能】 ① 大学からのお知らせ閲覧(Myキーワード機能搭載) 大学からのお知らせをアプリ上で手軽に確認できます。自分が気になる言葉をあらかじめ設定しておくと、その言葉が含まれるお知らせに「Myキーワード」タグが自動で付きます。膨大な配信情報の中から自分に必要な情報だけがパッと目に飛び込んでくるため、大切な通知の見逃しをしっかり防ぎます。(今後のバージョンアップでUTASやUTOLに掲載されるお知らせ・掲示とも連携予定) ② 学修ポートフォリオ 日々の授業での学びや、課外活動などの記録を蓄積・振り返ることができる機能です。自身の学修の軌跡を可視化することで、今後の目標設定やより深い学びへのステップアップをサポートします。 【対象ユーザー】 東京大学の学生 ※ご利用には「UTokyo Account」が必要です。 【今後の展開について】 UTokyo Oneは、皆さんの学生生活をより豊かにするため、今後も順次機能の追加やバージョンアップを予定しています。新しいキャンパスライフのパートナーとして、ぜひご活用ください。

Screenshots

ProbabilityPlayer4 screens
UTokyo One4 screens

Verdict

The call

The clearest difference is in-app purchases: UTokyo One at none against ProbabilityPlayer's 1. UTokyo One also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, ads and device support 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

Both are free to download. ProbabilityPlayer sells 1 one-off in-app purchase. UTokyo One asks for nothing beyond the download.

UpkeepUpdate frequency

ProbabilityPlayer ships an update monthly, UTokyo One every 5 weeks. The most recent releases landed on September 27, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 6 level
ProbabilityPlayer versus UTokyo One: the parameters behind the verdict, then further details
ParameterProbabilityPlayerUTokyo One
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyMonthly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.015.0 — better
Further details — not scored
Size9 MB90 MB
Age rating4+17+
DeveloperMotonari HibiThe University of Tokyo

In-app purchases

1 purchases

ProbabilityPlayer

One-time1
  • Premium$1.99
None

UTokyo One

No in-app purchases

Questions

Is ProbabilityPlayer free?
ProbabilityPlayer is free to download, with in-app purchases available.
Is UTokyo One free?
UTokyo One is free to download, with no in-app purchases.
Do ProbabilityPlayer or UTokyo One have ads?
Neither ProbabilityPlayer nor UTokyo One shows ads.
Which is updated more often, ProbabilityPlayer or UTokyo One?
ProbabilityPlayer ships an update monthly, and UTokyo One every 5 weeks. Most recently, ProbabilityPlayer was updated on September 27, 2026 and UTokyo One on October 9, 2026.

Other comparisons