Comparison

ディアビアイ vs COMAS Trainer+

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

Head to head
About

ディアビアイ

Features
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ディアビアイは、自分に合った頑張り方、取り組み方を見つけることをサポートし学力アップを目指すだけでなく、「やり方を工夫すればできることが増える」という成功体験を増やすことで、学習以外でもワクワクしながら取り組む気持ちを育てます。 ※このアプリは教育機関や学習塾など学習補助用のアプリです。ご利用には専用アカウントが必要となりますので、インストール前に公式HP(https://www.diabi.site)からお問い合わせください。 【アプリの主な機能】 ■アビリティチェック  目と頭の使い方のチェックで、4つの学習のベースとなる力の得手不得手を理解します。 ■トレーニング  12種類、約1200問のオリジナルトレーニングを用意。ゲーム感覚で楽しく学べます。 ■マイページ  個々の特性に合わせた学習方法やおススメのトレーニングを確認することができ、支援方法や成長を可視化します。 ※本アプリは学びのサポートを目的としており学力向上を保証するものではありません。

About

COMAS Trainer+

Features
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COMAS Trainer+ — Speak Fluently Trainer+ is your AI-powered speaking partner for mastering English and Japanese. Practice real conversations, build confidence, and turn every interaction into measurable progress. Why Trainer+ Trainer+ focuses on what truly drives language acquisition: consistent speaking practice, active vocabulary development, and real-time feedback. Key Features Real-Life Scenario Practice: Practice speaking through structured, practical conversations, from introductions to real business situations. Bilingual AI Support: Receive explanations in your native language when needed and overcome communication barriers more efficiently. Instant Feedback and Coaching: Improve your sentence structure and word choice with immediate, actionable feedback. Personalized Flashcards: Automatically convert your conversations into customized vocabulary review sets based on your actual usage. Active Vocabulary Tracking: Track the words you actively use and monitor your progress over time. Designed for Measurable Progress Trainer+ helps you build consistent speaking habits, develop an active and usable vocabulary, and gain confidence in real-world communication. Learn by Speaking Trainer+ supports daily practice and long-term improvement through consistent, structured interaction. COMAS Trainer+ offers an auto-renewable monthly subscription to unlock full access. Pricing is displayed at sign-up. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your Apple ID Account Settings. Privacy Policy: https://yourteacher.ai/privacy-policy/ Terms Of Use: https://yourteacher.ai/terms-of-use/

Screenshots

ディアビアイ3 screens
COMAS Trainer+4 screens

Verdict

The call

The clearest difference is in-app purchases: ディアビアイ at none against COMAS Trainer+'s 1. ディアビアイ also leads on iOS requirement (13.0 vs 16.4). 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. COMAS Trainer+ sells 1 in-app purchase, starting at $16.00 per month. ディアビアイ asks for nothing beyond the download.

UpkeepUpdate frequency

ディアビアイ ships an update every 8 days, COMAS Trainer+ every 2 weeks. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 4 level
ディアビアイ versus COMAS Trainer+: the parameters behind the verdict, then further details
ParameterディアビアイCOMAS Trainer+
PriceFreeFree
Update frequencyEvery 8 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.4
Further details — not scored
Size55 MB109 MB
Age rating4+12+
DeveloperTECH Planning LLC.Teacher AI

In-app purchases

None

ディアビアイ

No in-app purchases

1 purchases

COMAS Trainer+

Subscriptions1
  • Comas - 1 month$16.001 Month

Questions

Is ディアビアイ free?
ディアビアイ is free to download, with no in-app purchases.
Is COMAS Trainer+ free?
COMAS Trainer+ is free to download, with in-app purchases available.
Do ディアビアイ or COMAS Trainer+ have ads?
Neither ディアビアイ nor COMAS Trainer+ shows ads.
Which is updated more often, ディアビアイ or COMAS Trainer+?
ディアビアイ ships an update every 8 days, and COMAS Trainer+ every 2 weeks. Most recently, ディアビアイ was updated on October 21, 2026 and COMAS Trainer+ on October 24, 2026.

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