iDev Tango vs Vocapy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iDev Tango
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iDev Tangoは、AIを活用した次世代の単語帳アプリです。アプリエンジニアが技術用語を効率的に学習できるよう、最新のAI技術と直感的なUIを組み合わせました。 ・AI定義作成機能 AI定義作成機能により、技術用語の意味を瞬時に理解できます。わからない単語を入力するだけで、専門家レベルの説明を自動作成。iOS、Swift、SwiftUIの専門用語も、AIがわかりやすく解説します。 ・フラッシュカードで、効率的に学習 スワイプ操作で直感的に学習できるフラッシュカード機能。理解度に応じた復習システムで、覚えにくい用語も効率的に学習できます。 ・テーマ別整理で、体系的な学習 フォルダ機能で、テーマ別に単語を整理。iOS開発、Swift言語、SwiftUIなど、学習したい分野ごとに単語を分類できます。自分だけのカスタム単語帳を作成し、効率的に学習を進めましょう。 ・オフラインでも学習可能 一度ダウンロードした用語は、オフライン環境でも学習できます。通勤中や移動中など、インターネット接続がない環境でも、いつでもどこでも学習を続けられます。 こんな方におすすめ! ・iOSアプリ開発を学んでいる方 ・SwiftやSwiftUIの技術用語を覚えたい方 ・エンジニアとしてスキルアップしたい方 ・効率的な学習方法を探している方 ・技術書を読む際の用語集として活用したい方 iDev Tangoで技術用語に強いiOSエンジニアに!
Vocapy
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Vocapy — Learn English Words with Images Tired of buying English vocabulary books and never finishing them? Vocapy turns any English word into a personalized learning experience. Simply enter a word, and AI automatically generates its meanings, example sentences, visual images, and native pronunciation. Instead of memorizing boring Japanese translations, learn English words by seeing and hearing the situations in which they are actually used — helping them stick in your memory naturally. Perfect for • Learners preparing for the TOEIC or EIKEN • Anyone who has bought vocabulary books but struggled to keep studying • Anyone who finds memorization difficult • Learners who want to study phrases, phrasal verbs, and idioms as well as individual words Key Features ▷ AI-generated meanings, example sentences, images & audio Vocapy supports not only individual words, but also phrases, phrasal verbs, and idioms such as “party animal” and “spill the beans.” AI identifies the key meanings and automatically generates example sentences, visual images, and native pronunciation audio for each meaning. ▷ Remember words by seeing the situation AI turns the scene described in an example sentence into an image. Instead of simply memorizing translations, you learn each word through the situation where it is actually used. This helps you remember words longer and naturally understand how to use them in context. ▷ Create your own vocabulary books Create and organize your own vocabulary books however you like. Build personalized lists for different goals, such as TOEIC preparation, everyday conversation, or any other learning purpose. ▷ Smart review schedule based on the forgetting curve Vocapy uses the SM-2 algorithm to schedule reviews at the right time — just before you are likely to forget a word. Review efficiently and build long-term memory without having to decide what to study every day. ▷ 4 Learning Modes • Image Cards — Learn at your own pace with images and example sentences • Image Quiz — Guess the meaning from the image • Word Quiz — Match English words with their meanings • English Writing — Write your own sentence using the word and get AI-powered feedback (Pro) ▷ Features that make learning easier to keep up • Daily reminders with customizable notification times • Home screen widget to see today's words at a glance • Learning streaks to help you stay motivated ▷ Preset Vocabulary Books (Pro) Import 100-word vocabulary books for different TOEIC levels — 500 / 600 / 700 / 800 — with a single tap. Start learning right away without having to create your own vocabulary list. Pricing • Free Plan: ¥0 AI image generation: up to 30 images/month / Basic features • Pro Plan: ¥1,000/month or ¥10,000/year (¥833/month) English definitions, usage, contexts, core meanings / All features Terms of Use: https://docs.google.com/document/d/e/2PACX-1vSjmF2K7FKMoW-MiJSjDmmWqzrtJVTfLC1BSUOBMmwn-0lELkoL8h9mUqpl-IwCBfikcxBJgo9HljUz/pub Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vR-HDUH2i3M9i1y_UlDP7mKLBlsdEoSQM-jYnkUcX8o0b3mmPQ5rtW49085ol8gv9IBLu4SjyUdGtHc/pub
Screenshots
Verdict
The clearest difference is in-app purchases: iDev Tango at none against Vocapy's 2. iDev Tango also leads on update cadence (every 2 days vs every 2 weeks). Vocapy's advantage is iOS requirement (13.0 vs 17.6). On price, 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
Both are free to download. Vocapy sells 2 in-app purchases, starting at $5.99 per month. iDev Tango asks for nothing beyond the download.
iDev Tango ships an update every 2 days, Vocapy every 2 weeks. The most recent releases landed on October 12, 2026 and October 11, 2026 respectively.
| Parameter | iDev Tango | Vocapy |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Every 2 weeks |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | shohei yukawa | Shiori Kitayama |
In-app purchases
iDev Tango
No in-app purchases
Vocapy
- PRO$5.991 Month
- PRO 年額$59.991 Year









