Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
Real英会話
ネイティブが実際に使う英会話フレーズを集結した10年間のトップセラー英語学習アプリ。
$7.99 · In-app purchases
PRICE
$7.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
51 ratings · Top 5%
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Real英会話: map the core Education workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Offer a wider variety of topics and advanced lessons.
Assumption to check: Limited course content and depth.
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate more interactive exercises and speaking practices.
Assumption to check: Lack of interactivity in lessons.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance tracking with detailed analytics and feedback.
Assumption to check: Inadequate progress tracking features.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce tiered pricing or a freemium model.
Assumption to check: High subscription cost for some users.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
ネイティブが実際に使う英会話フレーズを集結した10年間のトップセラー英語学習アプリ。 ● 3200以上のフレーズ + 新しいフレーズを更新 ● 全フレーズに例文、コメント、音声付き ● 自動再生、音声認識で発音チェック、４種類のクイズ ● 知りたいフレーズをテリー先生に質問 ◎「Real英会話」について 英会話講師テリー先生が作った英語学習アプリです。ここでは難しい単語や英文法などにとらわれず、実際にネイティブが使う生きた日常英語フレーズを丸ごと覚える学習法を提供しています。フレーズ全てに例文がついており、シチュエーションが分かりやすく使い方を簡単にイメージする事ができます。英文をタップすることでネイティブの音声を瞬時に聞く事ができ、「こういう時ネイティブはこう言う」をコンセプトとしています。 また、知りたいフレーズが掲載されてない場合は「◯◯は英語でなんと言いますか?」とテリー先生にフレーズリクエストで質問しましょう。今まで150,000以上のリクエストに回答して参りました。 ４種類のフレーズクイズで楽しみながら自然にフレーズを覚え、自信がついてきたらゲームセンターでみなさんと競い合って下さい。 自分の空いた時間に楽しく簡単に英会話表現が身に付きます。一日1フレーズだけでも英語表現を身につけましょう。 ◎ 特徴 • 新しいフレーズ更新 • 日常英会話3100フレーズ(全て例文と音声付き) • 音声認識で発音練習 • 4種類のクイズゲーム（リスニング・スピーキング・ディクテーション・スピード） • 間隔反復システム採用 • フレーズリクエスト機能と掲示板 • 自動再生モード(音楽のように聞き流せます) ◎ 掲載フレーズ(サンプル) - Before you know it.「あっと言う間に」 - I wouldn't say...「〜とは言えない」 - You asked for it.「自業自得」 - Let's leave it at that.「そういう事にしておこう」 - I was tied up with something.「ちょっと用事があった」 ◎ カテゴリー 親友の会話、恋人の話、食べる時、車の中で、あいさつ、初対面の話題作り、好きと嫌い、待ち合わせ、仕事、電話で、買い物、ことわざ、怒るとき、体と健康、クラスルーム、感謝するとき、感情、性格、パソコン、エンターテイメント ご利用契約 https://realeikaiwa.ltbox.co.jp/terms_of_use プライバシーポリシー https://realeikaiwa.ltbox.co.jp/privacy_policy
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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BUILD KIT DIFFICULTY
Intermediate
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
