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
neo文庫
neo文庫は iPad でも iPhone でも使える電子書籍アプリです。
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 neo文庫: map the core Books 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
Implement advanced filtering and sorting options.
Assumption to check: Users often find it hard to manage large libraries effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Add visual progress indicators and statistics.
Assumption to check: Users desire better tracking of reading progress.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate social sharing features for users to share their reading lists.
Assumption to check: Limited social sharing options.
Validate with people who use this workflow before building.
Hypothesis 4
Utilize algorithms to provide tailored book suggestions.
Assumption to check: Users want personalized recommendations.
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
neo文庫は iPad でも iPhone でも使える電子書籍アプリです。 ●パラパラページめくり 2本指ページめくりで連続してめくり戻すこともできます ●端正な縦書き表示 ルビ、縦中横、欧文、句読点や括弧類などの組み方を再現 ●内蔵辞書、バックライト明るさ調節などに対応 ●作品を選びやすい 作家別・作品名順のほかランキング500、分野別、児童書分野別リストあり インターネットの図書館青空文庫でテキストファイルで公開されている17,000作品以上読み放題【著作権存続作品を含む】 本文検索、内蔵辞書引き、大辞林連携、大辞泉連携、ダウンロードした作品を書棚に分類整理、図書カードwebページ表示 （※大辞林と大辞泉は他社製品です） 文字サイズは文庫本、えほん、大活字、太明朝、太大活字をワンタッチで選べます 背景色は20色、文字色は白黒それぞれ3色から選べます 表示書体はヒラギノ明朝、ヒラギノ角ゴシック、それぞれ太字も選べます 好みの名前で本棚を追加し分類できます。本棚の内容は入手順/未読順/作家別/作品名順で表示できます。 青空文庫の注記情報、ルビ・字下げ・地寄せ・地付き・漢文返り点・訓点送り仮名・改ページ・改丁・改見開き・挿絵表示・傍点・傍線などに対応。 ●どのような作品をダウンロードしたかの情報種集はいっさいおこないません。 ご注意 ・作品のダウンロードには携帯ネットワークまたはWiFiのネット環境が必要です。(作品は内蔵していません) ※読み上げとVoiceOverには対応していません。VoiceOverでお使いの場合は弊社の別アプリ『豊平文庫Lite』をご検討ください。
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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.
SUGGESTED BUILD STACK
React Native
Expo
Supabase
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React Navigation
Zustand
BUILD KIT DIFFICULTY
Advanced
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.
