Comparison

MotiTan vs bayes_lab

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

Head to head
About

MotiTan

This app uses AI to create a fun and effective way to learn English vocabulary. It offers various game modes, including quests and real-time online battles, to help users memorize words through engaging challenges. Track your progress and compete with others to improve your English skills.

Highlights
  • AI-powered personalized learning
  • Gamified vocabulary quests
  • Real-time online battles
  • Progress tracking and visualization
  • Character collection and customization
  • Monthly rankings and rewards
  • Friend challenges and collaboration
Read full description

"Just one more battle." Before you know it, you know more words than you did yesterday. The joy of winning a quick match overlaps with the pure satisfaction of realizing you actually remembered the word when it mattered. ■ 50-second real-time vocabulary battles Jump into quick 50-second quiz battles against friends or other players in real time. Each match is fast and focused, making it easy to fit meaningful vocabulary practice into short breaks during your day. You can compete in the Citizen League rankings, or choose to practice comfortably without joining the league. ■ Adventure mode with instant explanations Meet each word naturally in Adventure mode. Learn vocabulary through clear pictures, audio pronunciations, and example sentences while answering quizzes. If you make a mistake, explanations appear immediately so you can correct your understanding on the spot. You can also look up words anytime using the built-in dictionary. ■ Smart word books and custom review Keep your vocabulary organized automatically. Your word book sorts words based on how well you know them, helping you review weak or almost-forgotten terms before they slip away. You can also create your own custom word books for specific goals. Take a vocabulary level check to measure your current knowledge and select the ideal course for your level. ■ Listen on the go Turn on audio autoplay to listen to your words wherever you are. Adjust audio through 7 speed settings ranging from 0.5x to 3.0x. Background playback keeps audio running smoothly even when your screen is locked. Keep track of your consistency with learning records, complete missions, and dress up your characters. ■ Courses for English speakers Expand your vocabulary in Japanese, Korean, Chinese (Mandarin), Spanish, French, or German: - Japanese: Conversation, JLPT, Kids - Korean: Conversation, TOPIK, Kids - Chinese: Conversation, HSK, AP Chinese, Kids - Spanish: Conversation, DELE, AP Spanish, Kids - French: Conversation, DELF/DALF, TEF/TCF Canada, Kids - German: Conversation, Goethe-Zertifikat, Kids ■ Sister app integration MotiTan is made by Astran in Tokyo. You can log in with the same account across both MotiTan and our sister conversation app, MotiSpi, to build your vocabulary and conversational skills together. ■ Free to start MotiTan is free to start. Some features include paid plans and usage limits. A Family plan is also available for parents managing their family's learning experience. Terms of Use https://motitown.com/notification/document/legal-privacy/riyokiyaku Privacy Policy https://motitown.com/notification/document/legal-privacy/motitan AP is a trademark registered by the College Board, which is not affiliated with, and does not endorse, this app.

About

bayes_lab

Features
Read full description

むずかしい数式なしで「ベイズ統計」を学び、あなたのデータ(CSV)でそのまま確かめられる、学習・実験アプリです。 ■ はじめてでも迷わない「基礎ガイド」 ベイズって何? → 公式の意味 → 何に使える? → 応用、と段階的に学べます。 ■ 学ぶ(学習図鑑) ・ベイズ統計/事前分布・事後分布 ・ポアソン分布/Gamma-Poissonモデル ・Beta-Binomialモデル/A・B比較/3群以上の比較 ・正規分布・Student-t分布/ロバスト推定 ・過分散/負の二項分布/ゼロ過剰ポアソン/情報のある事前分布 図とやさしい言葉、具体例つきで解説します。 ■ 試す(実験) CSVを読み込むと、列名から解析タイプを自動で判定します。 ・成功率・不良率(Beta-Binomial):真の成功率の範囲を推定 ・A/B・多群比較:どちらが良いかを「確率」で判定 ・件数データ(Gamma-Poisson):過分散・ゼロ過剰も自動チェックし、次回の予測まで ・連続値の比較:平均差・95%信用区間。外れ値に強いロバスト推定も併記 結果は確率と幅で日本語解説。出てきた用語はワンタップで学習図鑑へ。 ■ 残す・共有する ・解析結果の履歴保存/検索/タグ付け ・PDFレポート出力 ・過去の実績を事前分布に取り込んで再解析 ■ 確認する(クイズ) 初級・中級・高度のレベル別で、理解度をチェックできます。 すべて端末内で完結します。アカウント登録もネット接続も不要で、データは一切収集しません。 ※ 本アプリは教育・検証用です。医療・法務・金融など高リスクな最終判断にそのまま使わないでください。実務導入時は、モデルの妥当性・データ品質・監査ログ・レポート再現性をご確認ください。

Screenshots

MotiTan4 screens
bayes_lab4 screens

Verdict

The call

The clearest difference is in-app purchases: bayes_lab at none against MotiTan's 16. bayes_lab also leads on ads (none vs shown) and update cadence (daily vs weekly). MotiTan's advantage is iOS requirement (15.0 vs 26.4). On price 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. MotiTan sells 16 in-app purchases, starting at $9.99 per month. bayes_lab asks for nothing beyond the download.

UpkeepUpdate frequency

MotiTan ships an update weekly, bayes_lab daily. The most recent releases landed on October 20, 2026 and October 16, 2026 respectively.

Scorecard4 real differences · 6 level
MotiTan versus bayes_lab: the parameters behind the verdict, then further details
ParameterMotiTanbayes_lab
PriceFreeFree
Rating4.7 (151 ratings) — better—
Positive reviews52.6% of reviews—
Number of ratings151 — better—
Update frequencyWeeklyDaily — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.4
Further details — not scored
Size410 MB3 MB
Age rating4+4+
DeveloperAstran Inc.BeeKnowledgeDesign,Inc.

In-app purchases

16 purchases

MotiTan

Subscriptions6
  • 1ヶ月プラン$9.991 Month
  • 1ヶ月プラン(キャンペーン)3 Days trial$9.991 Month
  • 12ヶ月プラン(キャンペーン)3 Days trial$49.991 Year
Show 3 more
  • 12ヶ月プラン$59.991 Year
  • ファミリープラン(キャンペーン)3 Days trial$59.991 Year
  • ファミリープラン$69.991 Year
One-time10
  • コイン 1,000枚$0.49
  • モチベイト原石×1$0.99
  • コイン 5,000枚$2.99
Show 7 more
  • モチベイト原石×6$3.99
  • モチベイト原石×12$5.99
  • コイン 20,000枚$8.99
  • モチベイト原石×30$12.99
  • モチベイト原石×60$24.99
  • モチベイト原石×85$29.99
  • コイン 100,000枚$39.99
None

bayes_lab

No in-app purchases

Questions

Is MotiTan free?
MotiTan is free to download, with in-app purchases available.
Is bayes_lab free?
bayes_lab is free to download, with no in-app purchases.
Do MotiTan or bayes_lab have ads?
MotiTan shows ads; bayes_lab does not.
Which is updated more often, MotiTan or bayes_lab?
MotiTan ships an update weekly, and bayes_lab daily. Most recently, MotiTan was updated on October 20, 2026 and bayes_lab on October 16, 2026.

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